[PATCH 00/43] [RFC] modeset rework, part 1

[PATCH 00/43] [RFC] modeset rework, part 1

[Daniel Vetter]

Hi all,

This patch bomb is just the prep work for the actual rework ;-)

The goal of this little adventure is to move away from the crtc helper code,
which has the fundamental assumption that encoders and crtc can be
enabled/disabled in any order, as long as we take care of depencies.

Our hw works differently. We already have tons of ugly cases where crtc code
enable encoder hw (or encoder->mode_set enables stuff that should only be
enabled in enocder->commit) to work around these issues. But on the disable side
we can't pull off similar tricks - there we actually need to rework the modeset
sequence that controls all this.

Quick summary of the changes in here - the patches that actually introduce a new
concept all have rather extensive commit messages to explain things:
- Add new encoder->enable/disable functions which are directly called from the
  crtc->enable/disable function. This ensures that the encoder's can be
  enabled/disabled at a very specific in the modeset sequence, controlled by our
  platform specific code.
- Rework the dpms code - our code has mostly 1:1 connector:encoder mappings and
  does support cloning on on a few encoders, so we can simplify things quite a
  bit. Also only ever disable/enable the entire output pipeline - this ensures
  that we obey the right sequence of enabling/disabling things. For cloneable
  encoders this requires a bit of special handling to ensure that outputs can
  still be disabled individually, but it simplifies the common case quite a bit.
- Add infrastructure to read out the current hw state. No amount of careful
  ordering will help us if we brick the hw on the first modesetup. Which could
  happen if we just randomly disable things, oblivious to the state set up by
  the bios. Hence we need to be able to read that out. As a benefit, we grow a
  few generic functions useful to cross-check our modeset code with actual hw
  state.
- A few little changes/cleanups in a few encoders to make the above less
  onerous.

Things that are still needed:
- Reworking the modeset code - the current copy&pasted code still pretty much
  works like the crtc helper and doesn't disable things correctly yet.
- Once the above is in place, add new hooks to enable special connectors at the
  right place. I'm thinking of encoder->pre_enable and encoder->post_disable,
  which would each run after/before the plane/pipe/plls.
- Actually fix the cpu edp bugs (and port the hsw dp code) with the new hooks.

And further out, i.e. auxiliary benefits:
- Fix up our confusion in the resume path - we enable a few encoders by accident
  when restoring registers.
- Clean things up by moving a few of the existing hacks around, e.g. the edp pll
  enabling or the lvds/pll enabling.
- fastboot - the hw state readout code is neat prep work for that, the patch
  itself lists some of the missing bits.
- Fixing all the bugs turned up by the more stringent cross-checking the new
  code allows - the last patch in this series gives a glimpse, but I plan to add
  much more after the modeset sequence has saner semantics.

Patch series lightly tested, atm I'm beating on it with my machines. Due to lack
of hw, I'm looking for people with TV out and dvo encoders ...

Comments, flames, ideas and rants highly welcome. I hope that I can send out and
RFC with the new modeset code in a few days at most.

Cheers, Daniel

Daniel Vetter (43):
  drm/i915: introduce for_each_encoder_on_crtc
  drm/i915: add crtc->enable/disable vfuncs insted of dpms
  drm/i915: rip out crtc prepare/commit indirection
  drm/i915: add direct encoder disable/enable infrastructure
  drm/i915: add missing gen2 pipe A quirk entries
  drm/i915: rip out the overlay pipe A workaround
  drm/i915: prepare load-detect pipe code for dpms changes
  drm/i915/hdmi: convert to encoder->disable/enable
  drm/i915/tv: convert to encoder enable/disable
  drm/i915/lvds: ditch ->prepare special case
  drm/i915/lvds: convert to encoder disable/enable
  drm/i915/dp: convert to encoder disable/enable
  drm/i915: create VLV_DSIPLAY_BASE #define
  drm/i915: group ADPA #defines together
  drm/i915: add inte_crt->adpa_reg
  drm/i915/crt: convert to encoder disable/enable
  drm/i915/sdvo: convert to encoder disabl/enable
  drm/i915: simplify dvo dpms interface
  drm/i915: simplify possible_clones computation
  drm/i915: add port parameter to intel_hdmi_init
  drm/i915: convert dpms functions of dvo/sdvo/crt
  drm/i915: rip out encoder->disable/enable checks
  drm/i915: clean up encoder_prepare/commit
  drm/fb helper: don't call drm_crtc_helper_set_config
  drm: remove the list_head from drm_mode_set
  drm/i915: copy&paste drm_crtc_helper_set_config
  drm/i915: call set_base directly
  drm/i915: inline intel_best_encoder
  drm/i915: copy&paste drm_crtc_helper_set_mode
  drm/i915: simplify intel_crtc_prepare_encoders
  drm/i915: rip out encoder->prepare/commit
  drm/i915: call crtc functions directly
  drm/i915: WARN when trying to enabled an unused crtc
  drm/i915: Add interfaces to read out encoder/connector hw state
  drm/i915/dp: implement get_hw_state
  drm/i915/hdmi: implement get_hw_state
  drm/i915/tv: implement get_hw_state
  drm/i915/lvds: implement get_hw_state
  drm/i915/crt: implement get_hw_state
  drm/i915/sdvo: implement get_hw_state
  drm/i915/dvo: implement get_hw_state
  drm/i915: read out the modeset hw state at load and resume time
  drm/i915: check connector hw/sw state

 drivers/gpu/drm/drm_fb_helper.c      |    2 +-
 drivers/gpu/drm/i915/dvo.h           |   15 +-
 drivers/gpu/drm/i915/dvo_ch7017.c    |   21 +-
 drivers/gpu/drm/i915/dvo_ch7xxx.c    |   17 +-
 drivers/gpu/drm/i915/dvo_ivch.c      |   23 +-
 drivers/gpu/drm/i915/dvo_sil164.c    |   20 +-
 drivers/gpu/drm/i915/dvo_tfp410.c    |   18 +-
 drivers/gpu/drm/i915/i915_drv.c      |    3 +-
 drivers/gpu/drm/i915/i915_drv.h      |    8 +-
 drivers/gpu/drm/i915/i915_reg.h      |   52 +-
 drivers/gpu/drm/i915/intel_crt.c     |  157 ++++--
 drivers/gpu/drm/i915/intel_ddi.c     |   59 ++-
 drivers/gpu/drm/i915/intel_display.c | 1006 ++++++++++++++++++++++++++--------
 drivers/gpu/drm/i915/intel_dp.c      |  178 ++++---
 drivers/gpu/drm/i915/intel_drv.h     |   64 ++-
 drivers/gpu/drm/i915/intel_dvo.c     |  105 +++-
 drivers/gpu/drm/i915/intel_hdmi.c    |  203 ++++---
 drivers/gpu/drm/i915/intel_lvds.c    |   91 ++--
 drivers/gpu/drm/i915/intel_overlay.c |   58 +--
 drivers/gpu/drm/i915/intel_sdvo.c    |  178 +++++--
 drivers/gpu/drm/i915/intel_tv.c      |   56 ++-
 include/drm/drm_crtc.h               |    2 -
 22 files changed, 1645 insertions(+), 691 deletions(-)

-- 
1.7.7.6

[PATCH 01/43] drm/i915: introduce for_each_encoder_on_crtc

[Daniel Vetter]

We already have this pattern at quite a few places, and moving part of
the modeset helper stuff into the driver will add more.

v2: Don't clobber the crtc struct name with the macro parameter ...

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.h      |    4 +++
 drivers/gpu/drm/i915/intel_display.c |   38 ++++++++-------------------------
 drivers/gpu/drm/i915/intel_dp.c      |   22 +++++--------------
 3 files changed, 19 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a0c15ab..aa24fc1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -79,6 +79,10 @@ enum port {
 
 #define for_each_pipe(p) for ((p) = 0; (p) < dev_priv->num_pipe; (p)++)
 
+#define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
+	list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
+		if ((intel_encoder)->base.crtc == (__crtc))
+
 struct intel_pch_pll {
 	int refcount; /* count of number of CRTCs sharing this PLL */
 	int active; /* count of number of active CRTCs (i.e. DPMS on) */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3fbc802..72b73f8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -627,11 +627,10 @@ static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock
 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
-		if (encoder->base.crtc == crtc && encoder->type == type)
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		if (encoder->type == type)
 			return true;
 
 	return false;
@@ -2805,16 +2804,13 @@ static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
 static bool intel_crtc_driving_pch(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 
 	/*
 	 * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
 	 * must be driven by its own crtc; no sharing is possible.
 	 */
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 
 		/* On Haswell, LPT PCH handles the VGA connection via FDI, and Haswell
 		 * CPU handles all others */
@@ -3703,16 +3699,12 @@ static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct drm_encoder *encoder;
 	struct drm_connector *connector;
+	struct intel_encoder *intel_encoder;
 	unsigned int display_bpc = UINT_MAX, bpc;
 
 	/* Walk the encoders & connectors on this crtc, get min bpc */
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
-
-		if (encoder->crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
 
 		if (intel_encoder->type == INTEL_OUTPUT_LVDS) {
 			unsigned int lvds_bpc;
@@ -3744,7 +3736,7 @@ static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
 		/* Not one of the known troublemakers, check the EDID */
 		list_for_each_entry(connector, &dev->mode_config.connector_list,
 				    head) {
-			if (connector->encoder != encoder)
+			if (connector->encoder != &intel_encoder->base)
 				continue;
 
 			/* Don't use an invalid EDID bpc value */
@@ -4213,15 +4205,11 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 	u32 dspcntr, pipeconf, vsyncshift;
 	bool ok, has_reduced_clock = false, is_sdvo = false;
 	bool is_lvds = false, is_tv = false, is_dp = false;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 	const intel_limit_t *limit;
 	int ret;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
@@ -4524,15 +4512,11 @@ static int ironlake_get_refclk(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_encoder *encoder;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *edp_encoder = NULL;
 	int num_connectors = 0;
 	bool is_lvds = false;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
@@ -4569,7 +4553,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 	u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
 	bool ok, has_reduced_clock = false, is_sdvo = false;
 	bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder, *edp_encoder = NULL;
 	const intel_limit_t *limit;
 	int ret;
@@ -4580,10 +4563,7 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 	bool dither;
 	bool is_cpu_edp = false, is_pch_edp = false;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 76a7080..096947d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -793,8 +793,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		 struct drm_display_mode *adjusted_mode)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_encoder *encoder;
+	struct intel_encoder *encoder;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int lane_count = 4;
@@ -804,13 +803,9 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 	/*
 	 * Find the lane count in the intel_encoder private
 	 */
-	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		struct intel_dp *intel_dp;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
-		if (encoder->crtc != crtc)
-			continue;
-
-		intel_dp = enc_to_intel_dp(encoder);
 		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
 		    intel_dp->base.type == INTEL_OUTPUT_EDP)
 		{
@@ -2404,16 +2399,11 @@ int
 intel_trans_dp_port_sel(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_encoder *encoder;
+	struct intel_encoder *encoder;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		struct intel_dp *intel_dp;
-
-		if (encoder->crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
-		intel_dp = enc_to_intel_dp(encoder);
 		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
 		    intel_dp->base.type == INTEL_OUTPUT_EDP)
 			return intel_dp->output_reg;
-- 
1.7.7.6

[PATCH 02/43] drm/i915: add crtc->enable/disable vfuncs insted of dpms

[Daniel Vetter]

Because that's what we're essentially calling. This is the first step
in untangling the crtc_helper induced dpms handling mess we have - at
the crtc level we only have 2 states and the magic is just in selectin
which one (and atm there isn't even much magic, but on recent
platforms where not even the crt output has more than 2 states we
could do better).

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.h      |    3 +-
 drivers/gpu/drm/i915/intel_display.c |   62 ++++++++++------------------------
 2 files changed, 20 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index aa24fc1..111d1e5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -238,7 +238,6 @@ struct drm_i915_error_state {
 };
 
 struct drm_i915_display_funcs {
-	void (*dpms)(struct drm_crtc *crtc, int mode);
 	bool (*fbc_enabled)(struct drm_device *dev);
 	void (*enable_fbc)(struct drm_crtc *crtc, unsigned long interval);
 	void (*disable_fbc)(struct drm_device *dev);
@@ -255,6 +254,8 @@ struct drm_i915_display_funcs {
 			     struct drm_display_mode *adjusted_mode,
 			     int x, int y,
 			     struct drm_framebuffer *old_fb);
+	void (*crtc_enable)(struct drm_crtc *crtc);
+	void (*crtc_disable)(struct drm_crtc *crtc);
 	void (*off)(struct drm_crtc *crtc);
 	void (*write_eld)(struct drm_connector *connector,
 			  struct drm_crtc *crtc);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 72b73f8..072f94d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3299,30 +3299,6 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 	mutex_unlock(&dev->struct_mutex);
 }
 
-static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
-{
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	int pipe = intel_crtc->pipe;
-	int plane = intel_crtc->plane;
-
-	/* XXX: When our outputs are all unaware of DPMS modes other than off
-	 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
-	 */
-	switch (mode) {
-	case DRM_MODE_DPMS_ON:
-	case DRM_MODE_DPMS_STANDBY:
-	case DRM_MODE_DPMS_SUSPEND:
-		DRM_DEBUG_KMS("crtc %d/%d dpms on\n", pipe, plane);
-		ironlake_crtc_enable(crtc);
-		break;
-
-	case DRM_MODE_DPMS_OFF:
-		DRM_DEBUG_KMS("crtc %d/%d dpms off\n", pipe, plane);
-		ironlake_crtc_disable(crtc);
-		break;
-	}
-}
-
 static void ironlake_crtc_off(struct drm_crtc *crtc)
 {
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@@ -3402,23 +3378,6 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 	intel_update_watermarks(dev);
 }
 
-static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
-{
-	/* XXX: When our outputs are all unaware of DPMS modes other than off
-	 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
-	 */
-	switch (mode) {
-	case DRM_MODE_DPMS_ON:
-	case DRM_MODE_DPMS_STANDBY:
-	case DRM_MODE_DPMS_SUSPEND:
-		i9xx_crtc_enable(crtc);
-		break;
-	case DRM_MODE_DPMS_OFF:
-		i9xx_crtc_disable(crtc);
-		break;
-	}
-}
-
 static void i9xx_crtc_off(struct drm_crtc *crtc)
 {
 }
@@ -3440,7 +3399,20 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
 
 	intel_crtc->dpms_mode = mode;
 
-	dev_priv->display.dpms(crtc, mode);
+	/* XXX: When our outputs are all unaware of DPMS modes other than off
+	 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
+	 */
+	switch (mode) {
+	case DRM_MODE_DPMS_ON:
+	case DRM_MODE_DPMS_STANDBY:
+	case DRM_MODE_DPMS_SUSPEND:
+		dev_priv->display.crtc_enable(crtc);
+		break;
+
+	case DRM_MODE_DPMS_OFF:
+		dev_priv->display.crtc_disable(crtc);
+		break;
+	}
 
 	if (!dev->primary->master)
 		return;
@@ -6940,13 +6912,15 @@ static void intel_init_display(struct drm_device *dev)
 
 	/* We always want a DPMS function */
 	if (HAS_PCH_SPLIT(dev)) {
-		dev_priv->display.dpms = ironlake_crtc_dpms;
 		dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
+		dev_priv->display.crtc_enable = ironlake_crtc_enable;
+		dev_priv->display.crtc_disable = ironlake_crtc_disable;
 		dev_priv->display.off = ironlake_crtc_off;
 		dev_priv->display.update_plane = ironlake_update_plane;
 	} else {
-		dev_priv->display.dpms = i9xx_crtc_dpms;
 		dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
+		dev_priv->display.crtc_enable = i9xx_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
 		dev_priv->display.off = i9xx_crtc_off;
 		dev_priv->display.update_plane = i9xx_update_plane;
 	}
-- 
1.7.7.6

[PATCH 03/43] drm/i915: rip out crtc prepare/commit indirection

[Daniel Vetter]

Just impendance matching with the the crtc helper stuff.

... and somehow the design of this all ended up in this commit here,
too ;-)

The big plan is that a new set of display_funcs that take crtc take
full responsibility of a modeset (and call down into object-specific
callbacks and functions). The platform-specific callbacks simply know
best what the proper order is.

This has the drawback that we can't do minimal change-overs any more
if a modeset just disables one encoder in a cloned configuration
(because we will only expose a disabl/enable action that takes
down/sets up the entire crtc including all encoders). Imo that's the
only sane way to do it though:
- The use-case for this is pretty minimal, even when presenting (at
  least sane people) should use a dual-screen output so that you can
  see your notes on your panel. Clone mode is imo BS.
- With all the clone mode constrains, shared resources, and special
  ordering requirements (which differ even on the same platform
  sometimes for different outputs) there's no way we'd get this right
  for all cases. Especially since this is a under-used feature.
- And to top it off: On haswell even dp link re-training requires us
  to take down the entire display pipe - otherwise the chip dies.

So the only sane way is to do a full modeset on every crtc where the
output config changes in any way.

To support atomic modeset we'd then add one more function to allocate
global and shared objects in the best ways (e.g. fdi links, pch plls,
...). The crtc functions would then simply use the pre-allocated stuff
(and shouldn't be able to fail, ever). We could even do all the object
pinning in there (and maybe try to defragment the global gtt if we
fail)!

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   37 +--------------------------------
 1 files changed, 2 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 072f94d..608046f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3457,34 +3457,6 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
 	}
 }
 
-/* Prepare for a mode set.
- *
- * Note we could be a lot smarter here.  We need to figure out which outputs
- * will be enabled, which disabled (in short, how the config will changes)
- * and perform the minimum necessary steps to accomplish that, e.g. updating
- * watermarks, FBC configuration, making sure PLLs are programmed correctly,
- * panel fitting is in the proper state, etc.
- */
-static void i9xx_crtc_prepare(struct drm_crtc *crtc)
-{
-	i9xx_crtc_disable(crtc);
-}
-
-static void i9xx_crtc_commit(struct drm_crtc *crtc)
-{
-	i9xx_crtc_enable(crtc);
-}
-
-static void ironlake_crtc_prepare(struct drm_crtc *crtc)
-{
-	ironlake_crtc_disable(crtc);
-}
-
-static void ironlake_crtc_commit(struct drm_crtc *crtc)
-{
-	ironlake_crtc_enable(crtc);
-}
-
 void intel_encoder_prepare(struct drm_encoder *encoder)
 {
 	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
@@ -6598,13 +6570,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	intel_crtc->active = true; /* force the pipe off on setup_init_config */
 	intel_crtc->bpp = 24; /* default for pre-Ironlake */
 
-	if (HAS_PCH_SPLIT(dev)) {
-		intel_helper_funcs.prepare = ironlake_crtc_prepare;
-		intel_helper_funcs.commit = ironlake_crtc_commit;
-	} else {
-		intel_helper_funcs.prepare = i9xx_crtc_prepare;
-		intel_helper_funcs.commit = i9xx_crtc_commit;
-	}
+	intel_helper_funcs.prepare = dev_priv->display.crtc_disable;
+	intel_helper_funcs.commit = dev_priv->display.crtc_enable;
 
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
 
-- 
1.7.7.6

[PATCH 04/43] drm/i915: add direct encoder disable/enable infrastructure

[Daniel Vetter]

Just prep work, not yet put to some use.

Note that because we're still using the crtc helper to switch modes
(and their complicated way to do partial modesets), we need to call
the encoder's disable function unconditionally.

But once this is cleaned up we should call the encoder's disable
function unconditionally, because then we know that we'll only call it
if the encoder is actually enabled. Also note that we then need to be
careful about which crtc we're filtering the encoder list on: We want
to filter on the crtc of the _current_ mode, not the one we're about
to set up.

For the enabling side we need to do the same trick. And again, we
should be able to simplify this quite a bit when things have settled
into place.

Also note that this simply does not take cloning into account, so dpms
needs to be handled specially for the few outputs where we even bother
with it.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   38 ++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_drv.h     |    2 +
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 608046f..58fda88 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3147,13 +3147,16 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_encoder *encoder;
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
 	u32 temp;
 	bool is_pch_port;
 
+	/* XXX: For compatability with the crtc helper code, call the encoder's
+	 * enable function unconditionally for now. */
 	if (intel_crtc->active)
-		return;
+		goto encoders;
 
 	intel_crtc->active = true;
 	intel_update_watermarks(dev);
@@ -3200,6 +3203,12 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 	mutex_unlock(&dev->struct_mutex);
 
 	intel_crtc_update_cursor(crtc, true);
+
+encoders:
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->enable)
+			encoder->enable(encoder);
+	}
 }
 
 static void ironlake_crtc_disable(struct drm_crtc *crtc)
@@ -3207,10 +3216,18 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_encoder *encoder;
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
 	u32 reg, temp;
 
+	/* XXX: For compatability with the crtc helper code, call the encoder's
+	 * disable function unconditionally for now. */
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->disable)
+			encoder->disable(encoder);
+	}
+
 	if (!intel_crtc->active)
 		return;
 
@@ -3328,11 +3345,14 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_encoder *encoder;
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
 
+	/* XXX: For compatability with the crtc helper code, call the encoder's
+	 * enable function unconditionally for now. */
 	if (intel_crtc->active)
-		return;
+		goto encoders;
 
 	intel_crtc->active = true;
 	intel_update_watermarks(dev);
@@ -3347,6 +3367,12 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
 	/* Give the overlay scaler a chance to enable if it's on this pipe */
 	intel_crtc_dpms_overlay(intel_crtc, true);
 	intel_crtc_update_cursor(crtc, true);
+
+encoders:
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->enable)
+			encoder->enable(encoder);
+	}
 }
 
 static void i9xx_crtc_disable(struct drm_crtc *crtc)
@@ -3354,9 +3380,17 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_encoder *encoder;
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
 
+	/* XXX: For compatability with the crtc helper code, call the encoder's
+	 * disable function unconditionally for now. */
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->disable)
+			encoder->disable(encoder);
+	}
+
 	if (!intel_crtc->active)
 		return;
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index cc1573b..7224f4d 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -153,6 +153,8 @@ struct intel_encoder {
 	int type;
 	bool needs_tv_clock;
 	void (*hot_plug)(struct intel_encoder *);
+	void (*enable)(struct intel_encoder *);
+	void (*disable)(struct intel_encoder *);
 	int crtc_mask;
 	int clone_mask;
 };
-- 
1.7.7.6

[PATCH 05/43] drm/i915: add missing gen2 pipe A quirk entries

[Daniel Vetter]

For some odd reason we've missed i830 and a i855 variant. Also
kill the two now redundant i830 entries.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |    8 ++------
 1 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 58fda88..52b70ea 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7046,21 +7046,17 @@ static struct intel_quirk intel_quirks[] = {
 	/* HP Mini needs pipe A force quirk (LP: #322104) */
 	{ 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
 
-	/* Thinkpad R31 needs pipe A force quirk */
-	{ 0x3577, 0x1014, 0x0505, quirk_pipea_force },
 	/* Toshiba Protege R-205, S-209 needs pipe A force quirk */
 	{ 0x2592, 0x1179, 0x0001, quirk_pipea_force },
 
-	/* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
-	{ 0x3577,  0x1014, 0x0513, quirk_pipea_force },
-	/* ThinkPad X40 needs pipe A force quirk */
-
 	/* ThinkPad T60 needs pipe A force quirk (bug #16494) */
 	{ 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
 
 	/* 855 & before need to leave pipe A & dpll A up */
 	{ 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
 	{ 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
+	{ 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
+	{ 0x358e, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
 
 	/* Lenovo U160 cannot use SSC on LVDS */
 	{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
-- 
1.7.7.6

[PATCH 06/43] drm/i915: rip out the overlay pipe A workaround

[Daniel Vetter]

Now that all affected i830M systems have the pipe A quirk set,
we don't need to do any special dances in the overlay code any
longer. And reading through the code I'm rather dubios that it
actually does what it claims to do ...

As a nice benefit this rips out a users of the crtc helper dpms
callback.

v2: As suggested by Chris Wilson, replace the code by an appropriate
WARN to ensure that the pipe A is indeed running.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_overlay.c |   58 +---------------------------------
 1 files changed, 1 insertions(+), 57 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 830d0dd..c0f4858 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -235,54 +235,6 @@ static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
 	return 0;
 }
 
-/* Workaround for i830 bug where pipe a must be enable to change control regs */
-static int
-i830_activate_pipe_a(struct drm_device *dev)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	struct intel_crtc *crtc;
-	struct drm_crtc_helper_funcs *crtc_funcs;
-	struct drm_display_mode vesa_640x480 = {
-		DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
-			 752, 800, 0, 480, 489, 492, 525, 0,
-			 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
-	}, *mode;
-
-	crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[0]);
-	if (crtc->dpms_mode == DRM_MODE_DPMS_ON)
-		return 0;
-
-	/* most i8xx have pipe a forced on, so don't trust dpms mode */
-	if (I915_READ(_PIPEACONF) & PIPECONF_ENABLE)
-		return 0;
-
-	crtc_funcs = crtc->base.helper_private;
-	if (crtc_funcs->dpms == NULL)
-		return 0;
-
-	DRM_DEBUG_DRIVER("Enabling pipe A in order to enable overlay\n");
-
-	mode = drm_mode_duplicate(dev, &vesa_640x480);
-
-	if (!drm_crtc_helper_set_mode(&crtc->base, mode,
-				       crtc->base.x, crtc->base.y,
-				       crtc->base.fb))
-		return 0;
-
-	crtc_funcs->dpms(&crtc->base, DRM_MODE_DPMS_ON);
-	return 1;
-}
-
-static void
-i830_deactivate_pipe_a(struct drm_device *dev)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[0];
-	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
-
-	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
-}
-
 /* overlay needs to be disable in OCMD reg */
 static int intel_overlay_on(struct intel_overlay *overlay)
 {
@@ -290,17 +242,12 @@ static int intel_overlay_on(struct intel_overlay *overlay)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
 	struct drm_i915_gem_request *request;
-	int pipe_a_quirk = 0;
 	int ret;
 
 	BUG_ON(overlay->active);
 	overlay->active = 1;
 
-	if (IS_I830(dev)) {
-		pipe_a_quirk = i830_activate_pipe_a(dev);
-		if (pipe_a_quirk < 0)
-			return pipe_a_quirk;
-	}
+	WARN_ON(IS_I830(dev) && !(dev_priv->quirks & QUIRK_PIPEA_FORCE));
 
 	request = kzalloc(sizeof(*request), GFP_KERNEL);
 	if (request == NULL) {
@@ -322,9 +269,6 @@ static int intel_overlay_on(struct intel_overlay *overlay)
 
 	ret = intel_overlay_do_wait_request(overlay, request, NULL);
 out:
-	if (pipe_a_quirk)
-		i830_deactivate_pipe_a(dev);
-
 	return ret;
 }
 
-- 
1.7.7.6

[PATCH 07/43] drm/i915: prepare load-detect pipe code for dpms changes

[Daniel Vetter]

A few things need adjustement:
- Change the dpms state by calling the dpms connector function and
  not some crtc helper internal callbacks. Otherwise this will break
  once we switch to our own dpms handling.
- Instead of tracking and restoring intel_crtc->dpms_mode use the
  connector's dpms variable - the former relies on the dpms compuation
  rules used by the crtc helper. And it would break when the encoder
  is cloned and the other output has a different dpms state. But luckily
  no one is crazy enough for that.
- Properly clear the connector -> encoder -> crtc linking, even when
  failing (note that the crtc helper removes the encoder -> crtc link
  in disabled_unused_functions for us).

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   38 ++++++++++++---------------------
 1 files changed, 14 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 52b70ea..562ad86 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5570,21 +5570,12 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 	if (encoder->crtc) {
 		crtc = encoder->crtc;
 
-		intel_crtc = to_intel_crtc(crtc);
-		old->dpms_mode = intel_crtc->dpms_mode;
+		old->dpms_mode = connector->dpms;
 		old->load_detect_temp = false;
 
 		/* Make sure the crtc and connector are running */
-		if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
-			struct drm_encoder_helper_funcs *encoder_funcs;
-			struct drm_crtc_helper_funcs *crtc_funcs;
-
-			crtc_funcs = crtc->helper_private;
-			crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
-
-			encoder_funcs = encoder->helper_private;
-			encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
-		}
+		if (connector->dpms != DRM_MODE_DPMS_ON)
+			connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
 
 		return true;
 	}
@@ -5612,7 +5603,7 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 	connector->encoder = encoder;
 
 	intel_crtc = to_intel_crtc(crtc);
-	old->dpms_mode = intel_crtc->dpms_mode;
+	old->dpms_mode = connector->dpms;
 	old->load_detect_temp = true;
 	old->release_fb = NULL;
 
@@ -5637,22 +5628,25 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 		DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
 	if (IS_ERR(crtc->fb)) {
 		DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
-		crtc->fb = old_fb;
-		return false;
+		goto fail;
 	}
 
 	if (!drm_crtc_helper_set_mode(crtc, mode, 0, 0, old_fb)) {
 		DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
 		if (old->release_fb)
 			old->release_fb->funcs->destroy(old->release_fb);
-		crtc->fb = old_fb;
-		return false;
+		goto fail;
 	}
 
 	/* let the connector get through one full cycle before testing */
 	intel_wait_for_vblank(dev, intel_crtc->pipe);
 
 	return true;
+fail:
+	connector->encoder = NULL;
+	encoder->crtc = NULL;
+	crtc->fb = old_fb;
+	return false;
 }
 
 void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
@@ -5661,9 +5655,6 @@ void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_device *dev = encoder->dev;
-	struct drm_crtc *crtc = encoder->crtc;
-	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
-	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 
 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
 		      connector->base.id, drm_get_connector_name(connector),
@@ -5671,6 +5662,7 @@ void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
 
 	if (old->load_detect_temp) {
 		connector->encoder = NULL;
+		encoder->crtc = NULL;
 		drm_helper_disable_unused_functions(dev);
 
 		if (old->release_fb)
@@ -5680,10 +5672,8 @@ void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
 	}
 
 	/* Switch crtc and encoder back off if necessary */
-	if (old->dpms_mode != DRM_MODE_DPMS_ON) {
-		encoder_funcs->dpms(encoder, old->dpms_mode);
-		crtc_funcs->dpms(crtc, old->dpms_mode);
-	}
+	if (old->dpms_mode != DRM_MODE_DPMS_ON)
+		connector->funcs->dpms(connector, old->dpms_mode);
 }
 
 /* Returns the clock of the currently programmed mode of the given pipe. */
-- 
1.7.7.6

[PATCH 08/43] drm/i915/hdmi: convert to encoder->disable/enable

[Daniel Vetter]

I've picked hdmi as the first encoder to convert because it's rather
simple:
- no cloning possible
- no differences between prepare/commit and dpms off/on switching.

A few changes are required to do so:
- Split up the dpms code into an enable/disable function and wire it
  up with the intel encoder.
- Noop out the existing encoder prepare/commit functions used by the
  crtc helper - our crtc enable/disable code now calls back into the
  encoder enable/disable code at the right spot.
- Create new helper functions to handle dpms changes.
- Add intel_encoder->connectors_active to better track dpms state. Atm
  this is unused, but it will be useful to correctly disable the
  entire display pipe for cloned configurations. Also note that for
  now this is only useful in the dpms code - thanks to the crtc
  helper's dpms confusion across a modeset operation we can't (yet)
  rely on this having a sensible value in all circumstances.
- Rip out the encoder helper dpms callback, if this is still getting
  called somewhere we have a bug. The slight issue with that is that
  the crtc helper abuses dpms off to disable unused functions. Hence
  we also need to implement a default encoder disable function to do
  just that with the new encoder->disable callback.
- Note that we drop the cpt modeset verification in the commit
  callback, too. The right place to do this would be in the crtc's
  enable function, _after_ all the encoders are set up. But because
  not all encoders are converted yet, we can't do that. Hence disable
  this check temporarily as a minor concession to bisectability.

v2: Squash the dpms mode to only the supported values -
connector->dpms is for internal tracking only, we can hence avoid
needless state-changes a bit whithout causing harm.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_ddi.c     |   28 +++++---
 drivers/gpu/drm/i915/intel_display.c |   49 +++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |    8 ++-
 drivers/gpu/drm/i915/intel_hdmi.c    |  126 +++++++++++++++++++++++-----------
 4 files changed, 160 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index f33fe1a..b71303c 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -729,21 +729,16 @@ void intel_ddi_mode_set(struct drm_encoder *encoder,
 	intel_hdmi->set_infoframes(encoder, adjusted_mode);
 }
 
-void intel_ddi_dpms(struct drm_encoder *encoder, int mode)
+void intel_enable_ddi(struct intel_encoder *encoder)
 {
-	struct drm_device *dev = encoder->dev;
+	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 	int port = intel_hdmi->ddi_port;
 	u32 temp;
 
 	temp = I915_READ(DDI_BUF_CTL(port));
-
-	if (mode != DRM_MODE_DPMS_ON) {
-		temp &= ~DDI_BUF_CTL_ENABLE;
-	} else {
-		temp |= DDI_BUF_CTL_ENABLE;
-	}
+	temp |= DDI_BUF_CTL_ENABLE;
 
 	/* Enable DDI_BUF_CTL. In HDMI/DVI mode, the port width,
 	 * and swing/emphasis values are ignored so nothing special needs
@@ -752,3 +747,18 @@ void intel_ddi_dpms(struct drm_encoder *encoder, int mode)
 	I915_WRITE(DDI_BUF_CTL(port),
 			temp);
 }
+
+void intel_disable_ddi(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
+	int port = intel_hdmi->ddi_port;
+	u32 temp;
+
+	temp = I915_READ(DDI_BUF_CTL(port));
+	temp &= ~DDI_BUF_CTL_ENABLE;
+
+	I915_WRITE(DDI_BUF_CTL(port),
+			temp);
+}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 562ad86..62acf98 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3511,6 +3511,17 @@ void intel_encoder_commit(struct drm_encoder *encoder)
 		intel_cpt_verify_modeset(dev, intel_crtc->pipe);
 }
 
+void intel_encoder_noop(struct drm_encoder *encoder)
+{
+}
+
+void intel_encoder_disable(struct drm_encoder *encoder)
+{
+	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
+
+	intel_encoder->disable(intel_encoder);
+}
+
 void intel_encoder_destroy(struct drm_encoder *encoder)
 {
 	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
@@ -3519,6 +3530,44 @@ void intel_encoder_destroy(struct drm_encoder *encoder)
 	kfree(intel_encoder);
 }
 
+/* Simple dpms helper for encodres with just one connector, no cloning and only
+ * one kind of off state. It clamps all !ON modes to fully OFF and changes the
+ * state of the entire output pipe. */
+void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
+{
+	if (mode == DRM_MODE_DPMS_ON) {
+		encoder->connectors_active = true;
+
+		intel_crtc_dpms(encoder->base.crtc, DRM_MODE_DPMS_ON);
+	} else {
+		encoder->connectors_active = false;
+
+		intel_crtc_dpms(encoder->base.crtc, DRM_MODE_DPMS_OFF);
+	}
+}
+
+/* Even simpler default implementation, if there's really no special case to
+ * consider. */
+void intel_connector_dpms(struct drm_connector *connector, int mode)
+{
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+
+	/* All the simple cases only support two dpms states. */
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
+	if (mode == connector->dpms)
+		return;
+
+	connector->dpms = mode;
+
+	/* Only need to change hw state when actually enabled */
+	if (encoder->base.crtc)
+		intel_encoder_dpms(encoder, mode);
+	else
+		encoder->connectors_active = false;
+}
+
 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
 				  struct drm_display_mode *mode,
 				  struct drm_display_mode *adjusted_mode)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 7224f4d..40f50c2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -152,6 +152,7 @@ struct intel_encoder {
 	struct drm_encoder base;
 	int type;
 	bool needs_tv_clock;
+	bool connectors_active;
 	void (*hot_plug)(struct intel_encoder *);
 	void (*enable)(struct intel_encoder *);
 	void (*disable)(struct intel_encoder *);
@@ -390,7 +391,11 @@ extern enum drm_connector_status intel_panel_detect(struct drm_device *dev);
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
 extern void intel_encoder_prepare(struct drm_encoder *encoder);
 extern void intel_encoder_commit(struct drm_encoder *encoder);
+extern void intel_encoder_noop(struct drm_encoder *encoder);
+extern void intel_encoder_disable(struct drm_encoder *encoder);
 extern void intel_encoder_destroy(struct drm_encoder *encoder);
+extern void intel_encoder_dpms(struct intel_encoder *encoder, int mode);
+extern void intel_connector_dpms(struct drm_connector *, int mode);
 
 static inline struct intel_encoder *intel_attached_encoder(struct drm_connector *connector)
 {
@@ -496,7 +501,8 @@ extern void intel_gpu_ips_teardown(void);
 extern void intel_enable_gt_powersave(struct drm_device *dev);
 extern void intel_disable_gt_powersave(struct drm_device *dev);
 
-extern void intel_ddi_dpms(struct drm_encoder *encoder, int mode);
+extern void intel_enable_ddi(struct intel_encoder *encoder);
+extern void intel_disable_ddi(struct intel_encoder *encoder);
 extern void intel_ddi_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 5b2c88c..188399f 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -601,11 +601,11 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 	intel_hdmi->set_infoframes(encoder, adjusted_mode);
 }
 
-static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
+static void intel_enable_hdmi(struct intel_encoder *encoder)
 {
-	struct drm_device *dev = encoder->dev;
+	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 	u32 temp;
 	u32 enable_bits = SDVO_ENABLE;
 
@@ -617,31 +617,12 @@ static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 	/* HW workaround for IBX, we need to move the port to transcoder A
 	 * before disabling it. */
 	if (HAS_PCH_IBX(dev)) {
-		struct drm_crtc *crtc = encoder->crtc;
+		struct drm_crtc *crtc = encoder->base.crtc;
 		int pipe = crtc ? to_intel_crtc(crtc)->pipe : -1;
 
-		if (mode != DRM_MODE_DPMS_ON) {
-			if (temp & SDVO_PIPE_B_SELECT) {
-				temp &= ~SDVO_PIPE_B_SELECT;
-				I915_WRITE(intel_hdmi->sdvox_reg, temp);
-				POSTING_READ(intel_hdmi->sdvox_reg);
-
-				/* Again we need to write this twice. */
-				I915_WRITE(intel_hdmi->sdvox_reg, temp);
-				POSTING_READ(intel_hdmi->sdvox_reg);
-
-				/* Transcoder selection bits only update
-				 * effectively on vblank. */
-				if (crtc)
-					intel_wait_for_vblank(dev, pipe);
-				else
-					msleep(50);
-			}
-		} else {
-			/* Restore the transcoder select bit. */
-			if (pipe == PIPE_B)
-				enable_bits |= SDVO_PIPE_B_SELECT;
-		}
+		/* Restore the transcoder select bit. */
+		if (pipe == PIPE_B)
+			enable_bits |= SDVO_PIPE_B_SELECT;
 	}
 
 	/* HW workaround, need to toggle enable bit off and on for 12bpc, but
@@ -652,12 +633,67 @@ static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 		POSTING_READ(intel_hdmi->sdvox_reg);
 	}
 
-	if (mode != DRM_MODE_DPMS_ON) {
-		temp &= ~enable_bits;
-	} else {
-		temp |= enable_bits;
+	temp |= enable_bits;
+
+	I915_WRITE(intel_hdmi->sdvox_reg, temp);
+	POSTING_READ(intel_hdmi->sdvox_reg);
+
+	/* HW workaround, need to write this twice for issue that may result
+	 * in first write getting masked.
+	 */
+	if (HAS_PCH_SPLIT(dev)) {
+		I915_WRITE(intel_hdmi->sdvox_reg, temp);
+		POSTING_READ(intel_hdmi->sdvox_reg);
+	}
+}
+
+static void intel_disable_hdmi(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
+	u32 temp;
+	u32 enable_bits = SDVO_ENABLE;
+
+	if (intel_hdmi->has_audio)
+		enable_bits |= SDVO_AUDIO_ENABLE;
+
+	temp = I915_READ(intel_hdmi->sdvox_reg);
+
+	/* HW workaround for IBX, we need to move the port to transcoder A
+	 * before disabling it. */
+	if (HAS_PCH_IBX(dev)) {
+		struct drm_crtc *crtc = encoder->base.crtc;
+		int pipe = crtc ? to_intel_crtc(crtc)->pipe : -1;
+
+		if (temp & SDVO_PIPE_B_SELECT) {
+			temp &= ~SDVO_PIPE_B_SELECT;
+			I915_WRITE(intel_hdmi->sdvox_reg, temp);
+			POSTING_READ(intel_hdmi->sdvox_reg);
+
+			/* Again we need to write this twice. */
+			I915_WRITE(intel_hdmi->sdvox_reg, temp);
+			POSTING_READ(intel_hdmi->sdvox_reg);
+
+			/* Transcoder selection bits only update
+			 * effectively on vblank. */
+			if (crtc)
+				intel_wait_for_vblank(dev, pipe);
+			else
+				msleep(50);
+		}
 	}
 
+	/* HW workaround, need to toggle enable bit off and on for 12bpc, but
+	 * we do this anyway which shows more stable in testing.
+	 */
+	if (HAS_PCH_SPLIT(dev)) {
+		I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
+		POSTING_READ(intel_hdmi->sdvox_reg);
+	}
+
+	temp &= ~enable_bits;
+
 	I915_WRITE(intel_hdmi->sdvox_reg, temp);
 	POSTING_READ(intel_hdmi->sdvox_reg);
 
@@ -849,23 +885,23 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 }
 
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs_hsw = {
-	.dpms = intel_ddi_dpms,
 	.mode_fixup = intel_hdmi_mode_fixup,
-	.prepare = intel_encoder_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_ddi_mode_set,
-	.commit = intel_encoder_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
-	.dpms = intel_hdmi_dpms,
 	.mode_fixup = intel_hdmi_mode_fixup,
-	.prepare = intel_encoder_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_hdmi_mode_set,
-	.commit = intel_encoder_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_connector_dpms,
 	.detect = intel_hdmi_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = intel_hdmi_set_property,
@@ -987,10 +1023,18 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 		intel_hdmi->set_infoframes = cpt_set_infoframes;
 	}
 
-	if (IS_HASWELL(dev))
-		drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs_hsw);
-	else
-		drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
+	if (IS_HASWELL(dev)) {
+		intel_encoder->enable = intel_enable_ddi;
+		intel_encoder->disable = intel_disable_ddi;
+		drm_encoder_helper_add(&intel_encoder->base,
+				       &intel_hdmi_helper_funcs_hsw);
+	} else {
+		intel_encoder->enable = intel_enable_hdmi;
+		intel_encoder->disable = intel_disable_hdmi;
+		drm_encoder_helper_add(&intel_encoder->base,
+				       &intel_hdmi_helper_funcs);
+	}
+
 
 	intel_hdmi_add_properties(intel_hdmi, connector);
 
-- 
1.7.7.6

[PATCH 09/43] drm/i915/tv: convert to encoder enable/disable

[Daniel Vetter]

Like hdmi tv outputs are simple: They only have 2 states and can't be
cloned. Hence give it the same treatment.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_tv.c |   35 +++++++++++++++++++----------------
 1 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index a233a51..e2169d2 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -837,21 +837,21 @@ static struct intel_tv *intel_attached_tv(struct drm_connector *connector)
 }
 
 static void
-intel_tv_dpms(struct drm_encoder *encoder, int mode)
+intel_enable_tv(struct intel_encoder *encoder)
 {
-	struct drm_device *dev = encoder->dev;
+	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	switch (mode) {
-	case DRM_MODE_DPMS_ON:
-		I915_WRITE(TV_CTL, I915_READ(TV_CTL) | TV_ENC_ENABLE);
-		break;
-	case DRM_MODE_DPMS_STANDBY:
-	case DRM_MODE_DPMS_SUSPEND:
-	case DRM_MODE_DPMS_OFF:
-		I915_WRITE(TV_CTL, I915_READ(TV_CTL) & ~TV_ENC_ENABLE);
-		break;
-	}
+	I915_WRITE(TV_CTL, I915_READ(TV_CTL) | TV_ENC_ENABLE);
+}
+
+static void
+intel_disable_tv(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	I915_WRITE(TV_CTL, I915_READ(TV_CTL) & ~TV_ENC_ENABLE);
 }
 
 static const struct tv_mode *
@@ -1484,15 +1484,15 @@ out:
 }
 
 static const struct drm_encoder_helper_funcs intel_tv_helper_funcs = {
-	.dpms = intel_tv_dpms,
 	.mode_fixup = intel_tv_mode_fixup,
-	.prepare = intel_encoder_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_tv_mode_set,
-	.commit = intel_encoder_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_tv_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_connector_dpms,
 	.detect = intel_tv_detect,
 	.destroy = intel_tv_destroy,
 	.set_property = intel_tv_set_property,
@@ -1622,6 +1622,9 @@ intel_tv_init(struct drm_device *dev)
 	drm_encoder_init(dev, &intel_encoder->base, &intel_tv_enc_funcs,
 			 DRM_MODE_ENCODER_TVDAC);
 
+	intel_encoder->enable = intel_enable_tv;
+	intel_encoder->disable = intel_disable_tv;
+
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_TVOUT;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
-- 
1.7.7.6

[PATCH 10/43] drm/i915/lvds: ditch ->prepare special case

[Daniel Vetter]

LVDS is the first output where dpms on/off and prepare/commit don't
perfectly match. Now the idea behind this special case seems to be
that for simple resolution changes on the LVDS we don't need to stop
the pipe, because (at least on newer chips) we can adjust the panel
fitter on the fly.

There are a few problems with the current code though:
- We still stop and restart the pipe unconditionally, because the crtc
  helper code isn't flexible enough.
- We show some ugly flickering, especially when changing crtcs (this
  the crtc helper would actually take into account, but we don't
  implement the encoder->get_crtc callback required to make this work
  properly).

So it doesn't even work as advertised. I agree that it would be nice
to do resolution changes on LVDS (and also eDP) whithout blacking the
screen where the panel fitter allows to do that. But imo we should
implement this as a special case a few layers up in the mode set code,
akin to how we already detect simple framebuffer changes (and only
update that with ->mode_set_base).

Until this is all in place, make our lives easier and just rip it out.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_lvds.c |    8 +-------
 1 files changed, 1 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 05fcadb..4edbba4 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -409,13 +409,7 @@ static void intel_lvds_prepare(struct drm_encoder *encoder)
 {
 	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
 
-	/*
-	 * Prior to Ironlake, we must disable the pipe if we want to adjust
-	 * the panel fitter. However at all other times we can just reset
-	 * the registers regardless.
-	 */
-	if (!HAS_PCH_SPLIT(encoder->dev) && intel_lvds->pfit_dirty)
-		intel_lvds_disable(intel_lvds);
+	intel_lvds_disable(intel_lvds);
 }
 
 static void intel_lvds_commit(struct drm_encoder *encoder)
-- 
1.7.7.6

[PATCH 11/43] drm/i915/lvds: convert to encoder disable/enable

[Daniel Vetter]

With the previous patch LVDS is also a simple case. Treat it
accordingly.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_lvds.c |   52 ++++++++++---------------------------
 1 files changed, 14 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 4edbba4..9ae7fc9 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -68,10 +68,11 @@ static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector)
 /**
  * Sets the power state for the panel.
  */
-static void intel_lvds_enable(struct intel_lvds *intel_lvds)
+static void intel_enable_lvds(struct intel_encoder *encoder)
 {
-	struct drm_device *dev = intel_lvds->base.base.dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(intel_lvds->base.base.crtc);
+	struct drm_device *dev = encoder->base.dev;
+	struct intel_lvds *intel_lvds = to_intel_lvds(&encoder->base);
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 ctl_reg, lvds_reg, stat_reg;
 
@@ -111,9 +112,10 @@ static void intel_lvds_enable(struct intel_lvds *intel_lvds)
 	intel_panel_enable_backlight(dev, intel_crtc->pipe);
 }
 
-static void intel_lvds_disable(struct intel_lvds *intel_lvds)
+static void intel_disable_lvds(struct intel_encoder *encoder)
 {
-	struct drm_device *dev = intel_lvds->base.base.dev;
+	struct drm_device *dev = encoder->base.dev;
+	struct intel_lvds *intel_lvds = to_intel_lvds(&encoder->base);
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 ctl_reg, lvds_reg, stat_reg;
 
@@ -142,18 +144,6 @@ static void intel_lvds_disable(struct intel_lvds *intel_lvds)
 	POSTING_READ(lvds_reg);
 }
 
-static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
-{
-	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
-
-	if (mode == DRM_MODE_DPMS_ON)
-		intel_lvds_enable(intel_lvds);
-	else
-		intel_lvds_disable(intel_lvds);
-
-	/* XXX: We never power down the LVDS pairs. */
-}
-
 static int intel_lvds_mode_valid(struct drm_connector *connector,
 				 struct drm_display_mode *mode)
 {
@@ -405,23 +395,6 @@ out:
 	return true;
 }
 
-static void intel_lvds_prepare(struct drm_encoder *encoder)
-{
-	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
-
-	intel_lvds_disable(intel_lvds);
-}
-
-static void intel_lvds_commit(struct drm_encoder *encoder)
-{
-	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
-
-	/* Always do a full power on as we do not know what state
-	 * we were left in.
-	 */
-	intel_lvds_enable(intel_lvds);
-}
-
 static void intel_lvds_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode)
@@ -596,11 +569,11 @@ static int intel_lvds_set_property(struct drm_connector *connector,
 }
 
 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
-	.dpms = intel_lvds_dpms,
 	.mode_fixup = intel_lvds_mode_fixup,
-	.prepare = intel_lvds_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_lvds_mode_set,
-	.commit = intel_lvds_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
@@ -610,7 +583,7 @@ static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
 };
 
 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_connector_dpms,
 	.detect = intel_lvds_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = intel_lvds_set_property,
@@ -964,6 +937,9 @@ bool intel_lvds_init(struct drm_device *dev)
 	drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
 			 DRM_MODE_ENCODER_LVDS);
 
+	intel_encoder->enable = intel_enable_lvds;
+	intel_encoder->disable = intel_disable_lvds;
+
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_LVDS;
 
-- 
1.7.7.6

[PATCH 12/43] drm/i915/dp: convert to encoder disable/enable

[Daniel Vetter]

DP is the first encoder which isn't simple. As

commit d240f20f545fa4ed78ce48d1eb62ab529f2b1467
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Fri Aug 13 15:43:26 2010 -0700

    drm/i915: make sure eDP PLL is enabled at the right time

discovered, we need to enable the eDP PLL for the cpu port _before_ we
enable the pipes and planes. After a few more commits the current
solution is to enable the PLL in the dp mode_set function (because
this is the only encoder callback the crtc helper code calls before it
calls the crtc's commit function).

Now I suspect that we actually should enable/disable the entire cpu
eDP port before/after planes, but thanks to how the crtc helper code
assumes that you can disable an encoder without disabling it's crtc
right away, this won't work.

The result is that the current prepare/commit hooks don't touch the
eDP PLL, but instead it get's frobbed in dp_mode_set and in the dp
dpms function. Hence we need to keep things (at least for now)
bug-for-bug compatible by using our own special dp dpms function and
keep everything else more-or-less as-is (just using our own
infrastrucutre now).

This mess can only be cleaned once we control the entire modeset
sequence and can move around things freely.

v2: Squash unsupported dpms modes to OFF at the beginning of the DP
dpms function.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_dp.c |   88 +++++++++++++++++++-------------------
 1 files changed, 44 insertions(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 096947d..b8abbff 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1277,10 +1277,9 @@ static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
 	}
 }
 
-static void intel_dp_prepare(struct drm_encoder *encoder)
+static void intel_disable_dp(struct intel_encoder *encoder)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
 	/* Make sure the panel is off before trying to change the mode. But also
 	 * ensure that we have vdd while we switch off the panel. */
@@ -1293,62 +1292,60 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
 	ironlake_edp_panel_vdd_off(intel_dp, false);
 }
 
-static void intel_dp_commit(struct drm_encoder *encoder)
+static void intel_enable_dp(struct intel_encoder *encoder)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-	struct drm_device *dev = encoder->dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
 	ironlake_edp_panel_vdd_on(intel_dp);
 	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
-	intel_dp_start_link_train(intel_dp);
-	ironlake_edp_panel_on(intel_dp);
-	ironlake_edp_panel_vdd_off(intel_dp, true);
-	intel_dp_complete_link_train(intel_dp);
+	if (!(dp_reg & DP_PORT_EN)) {
+		intel_dp_start_link_train(intel_dp);
+		ironlake_edp_panel_on(intel_dp);
+		ironlake_edp_panel_vdd_off(intel_dp, true);
+		intel_dp_complete_link_train(intel_dp);
+	} else
+		ironlake_edp_panel_vdd_off(intel_dp, false);
 	ironlake_edp_backlight_on(intel_dp);
 
 	intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
-
-	if (HAS_PCH_CPT(dev))
-		intel_cpt_verify_modeset(dev, intel_crtc->pipe);
 }
 
 static void
-intel_dp_dpms(struct drm_encoder *encoder, int mode)
+intel_dp_dpms(struct drm_connector *connector, int mode)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
 
-	if (mode != DRM_MODE_DPMS_ON) {
-		/* Switching the panel off requires vdd. */
-		ironlake_edp_panel_vdd_on(intel_dp);
-		ironlake_edp_backlight_off(intel_dp);
-		ironlake_edp_panel_off(intel_dp);
+	/* DP supports only 2 dpms states. */
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
 
-		intel_dp_sink_dpms(intel_dp, mode);
-		intel_dp_link_down(intel_dp);
-		ironlake_edp_panel_vdd_off(intel_dp, false);
+	if (mode == connector->dpms)
+		return;
+
+	connector->dpms = mode;
+
+	/* Only need to change hw state when actually enabled */
+	if (!intel_dp->base.base.crtc) {
+		intel_dp->base.connectors_active = false;
+		return;
+	}
+
+	if (mode != DRM_MODE_DPMS_ON) {
+		intel_encoder_dpms(&intel_dp->base, mode);
+		WARN_ON(intel_dp->dpms_mode != DRM_MODE_DPMS_OFF);
 
 		if (is_cpu_edp(intel_dp))
-			ironlake_edp_pll_off(encoder);
+			ironlake_edp_pll_off(&intel_dp->base.base);
 	} else {
 		if (is_cpu_edp(intel_dp))
-			ironlake_edp_pll_on(encoder);
+			ironlake_edp_pll_on(&intel_dp->base.base);
 
-		ironlake_edp_panel_vdd_on(intel_dp);
-		intel_dp_sink_dpms(intel_dp, mode);
-		if (!(dp_reg & DP_PORT_EN)) {
-			intel_dp_start_link_train(intel_dp);
-			ironlake_edp_panel_on(intel_dp);
-			ironlake_edp_panel_vdd_off(intel_dp, true);
-			intel_dp_complete_link_train(intel_dp);
-		} else
-			ironlake_edp_panel_vdd_off(intel_dp, false);
-		ironlake_edp_backlight_on(intel_dp);
+		intel_encoder_dpms(&intel_dp->base, mode);
+		WARN_ON(intel_dp->dpms_mode != DRM_MODE_DPMS_ON);
 	}
-	intel_dp->dpms_mode = mode;
 }
 
 /*
@@ -2361,15 +2358,15 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 }
 
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
-	.dpms = intel_dp_dpms,
 	.mode_fixup = intel_dp_mode_fixup,
-	.prepare = intel_dp_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_dp_mode_set,
-	.commit = intel_dp_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_dp_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_dp_dpms,
 	.detect = intel_dp_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = intel_dp_set_property,
@@ -2507,6 +2504,9 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	drm_sysfs_connector_add(connector);
 
+	intel_encoder->enable = intel_enable_dp;
+	intel_encoder->disable = intel_disable_dp;
+
 	/* Set up the DDC bus. */
 	switch (output_reg) {
 		case DP_A:
-- 
1.7.7.6

[PATCH 13/43] drm/i915: create VLV_DSIPLAY_BASE #define

[Daniel Vetter]

Will be used more in the next patch.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.c |    2 +-
 drivers/gpu/drm/i915/i915_reg.h |    2 ++
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 79be879..57381eb 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1169,7 +1169,7 @@ static bool IS_DISPLAYREG(u32 reg)
 	 * This should make it easier to transition modules over to the
 	 * new register block scheme, since we can do it incrementally.
 	 */
-	if (reg >= 0x180000)
+	if (reg >= VLV_DISPLAY_BASE)
 		return false;
 
 	if (reg >= RENDER_RING_BASE &&
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ac65e96..524c70e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -528,6 +528,8 @@
 #define   GFX_PSMI_GRANULARITY		(1<<10)
 #define   GFX_PPGTT_ENABLE		(1<<9)
 
+#define VLV_DISPLAY_BASE 0x180000
+
 #define SCPD0		0x0209c /* 915+ only */
 #define IER		0x020a0
 #define IIR		0x020a4
-- 
1.7.7.6

[PATCH 14/43] drm/i915: group ADPA #defines together

[Daniel Vetter]

Splitting them up between pch and gmch variants just makes it harder
to find things. Especially since the hotplug bits are actually valid
on earlier chips, too.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_reg.h |   47 ++++++++++++++++++--------------------
 1 files changed, 22 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 524c70e..052d470 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1542,12 +1542,34 @@
 
 /* VGA port control */
 #define ADPA			0x61100
+#define PCH_ADPA                0xe1100
+
 #define   ADPA_DAC_ENABLE	(1<<31)
 #define   ADPA_DAC_DISABLE	0
 #define   ADPA_PIPE_SELECT_MASK	(1<<30)
 #define   ADPA_PIPE_A_SELECT	0
 #define   ADPA_PIPE_B_SELECT	(1<<30)
 #define   ADPA_PIPE_SELECT(pipe) ((pipe) << 30)
+/* CPT uses bits 29:31 for pch transcoder select */
+#define   ADPA_CRT_HOTPLUG_MASK  0x03ff0000 /* bit 25-16 */
+#define   ADPA_CRT_HOTPLUG_MONITOR_NONE  (0<<24)
+#define   ADPA_CRT_HOTPLUG_MONITOR_MASK  (3<<24)
+#define   ADPA_CRT_HOTPLUG_MONITOR_COLOR (3<<24)
+#define   ADPA_CRT_HOTPLUG_MONITOR_MONO  (2<<24)
+#define   ADPA_CRT_HOTPLUG_ENABLE        (1<<23)
+#define   ADPA_CRT_HOTPLUG_PERIOD_64     (0<<22)
+#define   ADPA_CRT_HOTPLUG_PERIOD_128    (1<<22)
+#define   ADPA_CRT_HOTPLUG_WARMUP_5MS    (0<<21)
+#define   ADPA_CRT_HOTPLUG_WARMUP_10MS   (1<<21)
+#define   ADPA_CRT_HOTPLUG_SAMPLE_2S     (0<<20)
+#define   ADPA_CRT_HOTPLUG_SAMPLE_4S     (1<<20)
+#define   ADPA_CRT_HOTPLUG_VOLTAGE_40    (0<<18)
+#define   ADPA_CRT_HOTPLUG_VOLTAGE_50    (1<<18)
+#define   ADPA_CRT_HOTPLUG_VOLTAGE_60    (2<<18)
+#define   ADPA_CRT_HOTPLUG_VOLTAGE_70    (3<<18)
+#define   ADPA_CRT_HOTPLUG_VOLREF_325MV  (0<<17)
+#define   ADPA_CRT_HOTPLUG_VOLREF_475MV  (1<<17)
+#define   ADPA_CRT_HOTPLUG_FORCE_TRIGGER (1<<16)
 #define   ADPA_USE_VGA_HVPOLARITY (1<<15)
 #define   ADPA_SETS_HVPOLARITY	0
 #define   ADPA_VSYNC_CNTL_DISABLE (1<<11)
@@ -3878,31 +3900,6 @@
 #define FDI_PLL_CTL_1           0xfe000
 #define FDI_PLL_CTL_2           0xfe004
 
-/* CRT */
-#define PCH_ADPA                0xe1100
-#define  ADPA_TRANS_SELECT_MASK (1<<30)
-#define  ADPA_TRANS_A_SELECT    0
-#define  ADPA_TRANS_B_SELECT    (1<<30)
-#define  ADPA_CRT_HOTPLUG_MASK  0x03ff0000 /* bit 25-16 */
-#define  ADPA_CRT_HOTPLUG_MONITOR_NONE  (0<<24)
-#define  ADPA_CRT_HOTPLUG_MONITOR_MASK  (3<<24)
-#define  ADPA_CRT_HOTPLUG_MONITOR_COLOR (3<<24)
-#define  ADPA_CRT_HOTPLUG_MONITOR_MONO  (2<<24)
-#define  ADPA_CRT_HOTPLUG_ENABLE        (1<<23)
-#define  ADPA_CRT_HOTPLUG_PERIOD_64     (0<<22)
-#define  ADPA_CRT_HOTPLUG_PERIOD_128    (1<<22)
-#define  ADPA_CRT_HOTPLUG_WARMUP_5MS    (0<<21)
-#define  ADPA_CRT_HOTPLUG_WARMUP_10MS   (1<<21)
-#define  ADPA_CRT_HOTPLUG_SAMPLE_2S     (0<<20)
-#define  ADPA_CRT_HOTPLUG_SAMPLE_4S     (1<<20)
-#define  ADPA_CRT_HOTPLUG_VOLTAGE_40    (0<<18)
-#define  ADPA_CRT_HOTPLUG_VOLTAGE_50    (1<<18)
-#define  ADPA_CRT_HOTPLUG_VOLTAGE_60    (2<<18)
-#define  ADPA_CRT_HOTPLUG_VOLTAGE_70    (3<<18)
-#define  ADPA_CRT_HOTPLUG_VOLREF_325MV  (0<<17)
-#define  ADPA_CRT_HOTPLUG_VOLREF_475MV  (1<<17)
-#define  ADPA_CRT_HOTPLUG_FORCE_TRIGGER (1<<16)
-
 /* or SDVOB */
 #define HDMIB   0xe1140
 #define  PORT_ENABLE    (1 << 31)
-- 
1.7.7.6

[PATCH 15/43] drm/i915: add inte_crt->adpa_reg

[Daniel Vetter]

With the base addresses shifting around, this is easier to handle.
Also move to the real reg offset on vlv.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_reg.h  |    1 +
 drivers/gpu/drm/i915/intel_crt.c |   23 ++++++++++++++++-------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 052d470..3b9c65e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1543,6 +1543,7 @@
 /* VGA port control */
 #define ADPA			0x61100
 #define PCH_ADPA                0xe1100
+#define VLV_ADPA		(VLV_DISPLAY_BASE + ADPA)
 
 #define   ADPA_DAC_ENABLE	(1<<31)
 #define   ADPA_DAC_DISABLE	0
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 61d55d3..8babc10 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -47,6 +47,7 @@
 struct intel_crt {
 	struct intel_encoder base;
 	bool force_hotplug_required;
+	u32 adpa_reg;
 };
 
 static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
@@ -55,6 +56,11 @@ static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
 			    struct intel_crt, base);
 }
 
+static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
+{
+	return container_of(encoder, struct intel_crt, base);
+}
+
 static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
@@ -145,19 +151,15 @@ static void intel_crt_mode_set(struct drm_encoder *encoder,
 
 	struct drm_device *dev = encoder->dev;
 	struct drm_crtc *crtc = encoder->crtc;
+	struct intel_crt *crt =
+		intel_encoder_to_crt(to_intel_encoder(encoder));
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int dpll_md_reg;
 	u32 adpa, dpll_md;
-	u32 adpa_reg;
 
 	dpll_md_reg = DPLL_MD(intel_crtc->pipe);
 
-	if (HAS_PCH_SPLIT(dev))
-		adpa_reg = PCH_ADPA;
-	else
-		adpa_reg = ADPA;
-
 	/*
 	 * Disable separate mode multiplier used when cloning SDVO to CRT
 	 * XXX this needs to be adjusted when we really are cloning
@@ -185,7 +187,7 @@ static void intel_crt_mode_set(struct drm_encoder *encoder,
 	if (!HAS_PCH_SPLIT(dev))
 		I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);
 
-	I915_WRITE(adpa_reg, adpa);
+	I915_WRITE(crt->adpa_reg, adpa);
 }
 
 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
@@ -682,6 +684,13 @@ void intel_crt_init(struct drm_device *dev)
 	else
 		encoder_helper_funcs = &gmch_encoder_funcs;
 
+	if (HAS_PCH_SPLIT(dev))
+		crt->adpa_reg = PCH_ADPA;
+	else if (IS_VALLEYVIEW(dev))
+		crt->adpa_reg = VLV_ADPA;
+	else
+		crt->adpa_reg = ADPA;
+
 	drm_encoder_helper_add(&crt->base.base, encoder_helper_funcs);
 	drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 
-- 
1.7.7.6

[PATCH 16/43] drm/i915/crt: convert to encoder disable/enable

[Daniel Vetter]

CRT is the first output which can be cloned, hence we cannot (yet)
move the dpms handling over to disable/enable. This requires some more
smarts in intel_crtc_dpms first to set the display pipe status
depening upon encoder->connectors_active of all connected encoders.

Because that will happen in a separate step, don't touch the dpms
functions, yet.

v2: Be careful about clearing the _DISABLE flags for intermediate dpms
modes - otherwise we might clobber the crt state when another (cloned)
connector gets enabled.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c |   36 ++++++++++++++++++++++++++++++++----
 1 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 8babc10..9525822 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -61,6 +61,29 @@ static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
 	return container_of(encoder, struct intel_crt, base);
 }
 
+static void intel_disable_crt(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+	struct intel_crt *crt = intel_encoder_to_crt(encoder);
+	u32 temp;
+
+	temp = I915_READ(crt->adpa_reg);
+	temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
+	temp &= ~ADPA_DAC_ENABLE;
+	I915_WRITE(crt->adpa_reg, temp);
+}
+
+static void intel_enable_crt(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+	struct intel_crt *crt = intel_encoder_to_crt(encoder);
+	u32 temp;
+
+	temp = I915_READ(crt->adpa_reg);
+	temp |= ADPA_DAC_ENABLE;
+	I915_WRITE(crt->adpa_reg, temp);
+}
+
 static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
@@ -582,18 +605,20 @@ static void intel_crt_reset(struct drm_connector *connector)
 
 static const struct drm_encoder_helper_funcs pch_encoder_funcs = {
 	.mode_fixup = intel_crt_mode_fixup,
-	.prepare = intel_encoder_prepare,
-	.commit = intel_encoder_commit,
+	.prepare = intel_encoder_noop,
+	.commit = intel_encoder_noop,
 	.mode_set = intel_crt_mode_set,
 	.dpms = pch_crt_dpms,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_encoder_helper_funcs gmch_encoder_funcs = {
 	.mode_fixup = intel_crt_mode_fixup,
-	.prepare = intel_encoder_prepare,
-	.commit = intel_encoder_commit,
+	.prepare = intel_encoder_noop,
+	.commit = intel_encoder_noop,
 	.mode_set = intel_crt_mode_set,
 	.dpms = gmch_crt_dpms,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_crt_connector_funcs = {
@@ -691,6 +716,9 @@ void intel_crt_init(struct drm_device *dev)
 	else
 		crt->adpa_reg = ADPA;
 
+	crt->base.disable = intel_disable_crt;
+	crt->base.enable = intel_enable_crt;
+
 	drm_encoder_helper_add(&crt->base.base, encoder_helper_funcs);
 	drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 
-- 
1.7.7.6

[PATCH 17/43] drm/i915/sdvo: convert to encoder disabl/enable

[Daniel Vetter]

Similar to crt, this doesn't convert the dpms functions.
Also similar to crt, we don't switch of the display pipe
for the intermediate modes, only DPMS_OFF is truely off.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_sdvo.c |   58 +++++++++++++++++++++++++++++++++++-
 1 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 2f5106a..d630db8 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1139,6 +1139,56 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder,
 	intel_sdvo_write_sdvox(intel_sdvo, sdvox);
 }
 
+static void intel_disable_sdvo(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+	struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
+	u32 temp;
+
+	intel_sdvo_set_active_outputs(intel_sdvo, 0);
+	if (0)
+		intel_sdvo_set_encoder_power_state(intel_sdvo,
+						   DRM_MODE_DPMS_OFF);
+
+	temp = I915_READ(intel_sdvo->sdvo_reg);
+	if ((temp & SDVO_ENABLE) != 0) {
+		intel_sdvo_write_sdvox(intel_sdvo, temp & ~SDVO_ENABLE);
+	}
+}
+
+static void intel_enable_sdvo(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+	u32 temp;
+	bool input1, input2;
+	int i;
+	u8 status;
+
+	temp = I915_READ(intel_sdvo->sdvo_reg);
+	if ((temp & SDVO_ENABLE) == 0)
+		intel_sdvo_write_sdvox(intel_sdvo, temp | SDVO_ENABLE);
+	for (i = 0; i < 2; i++)
+		intel_wait_for_vblank(dev, intel_crtc->pipe);
+
+	status = intel_sdvo_get_trained_inputs(intel_sdvo, &input1, &input2);
+	/* Warn if the device reported failure to sync.
+	 * A lot of SDVO devices fail to notify of sync, but it's
+	 * a given it the status is a success, we succeeded.
+	 */
+	if (status == SDVO_CMD_STATUS_SUCCESS && !input1) {
+		DRM_DEBUG_KMS("First %s output reported failure to "
+				"sync\n", SDVO_NAME(intel_sdvo));
+	}
+
+	if (0)
+		intel_sdvo_set_encoder_power_state(intel_sdvo,
+						   DRM_MODE_DPMS_ON);
+	intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
+}
+
 static void intel_sdvo_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
@@ -1844,9 +1894,10 @@ done:
 static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
 	.dpms = intel_sdvo_dpms,
 	.mode_fixup = intel_sdvo_mode_fixup,
-	.prepare = intel_encoder_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_sdvo_mode_set,
-	.commit = intel_encoder_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable
 };
 
 static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
@@ -2573,6 +2624,9 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob)
 
 	drm_encoder_helper_add(&intel_encoder->base, &intel_sdvo_helper_funcs);
 
+	intel_encoder->disable = intel_disable_sdvo;
+	intel_encoder->enable = intel_enable_sdvo;
+
 	/* In default case sdvo lvds is false */
 	if (!intel_sdvo_get_capabilities(intel_sdvo, &intel_sdvo->caps))
 		goto err;
-- 
1.7.7.6

[PATCH 18/43] drm/i915: simplify dvo dpms interface

[Daniel Vetter]

All dvo drivers only support 2 dpms states, and our dvo driver
even switches of the dvo port for anything else than DPMS_ON. Hence
ditch this complexity and simply use bool enable.

While reading through this code I've noticed that the mode_set
function of ch7017 is a bit peculiar - it disable the lvds again, even
though the crtc helper code should have done that ... This might be to
work around an issue at driver load, we pretty much ignore the hw
state when taking over.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/dvo.h        |    9 ++++-----
 drivers/gpu/drm/i915/dvo_ch7017.c |    8 ++++----
 drivers/gpu/drm/i915/dvo_ch7xxx.c |    4 ++--
 drivers/gpu/drm/i915/dvo_ivch.c   |    8 ++++----
 drivers/gpu/drm/i915/dvo_sil164.c |    4 ++--
 drivers/gpu/drm/i915/dvo_tfp410.c |    4 ++--
 drivers/gpu/drm/i915/intel_dvo.c  |    4 ++--
 7 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/dvo.h b/drivers/gpu/drm/i915/dvo.h
index 8c2ad01..8efec6d 100644
--- a/drivers/gpu/drm/i915/dvo.h
+++ b/drivers/gpu/drm/i915/dvo.h
@@ -58,13 +58,12 @@ struct intel_dvo_dev_ops {
 	void (*create_resources)(struct intel_dvo_device *dvo);
 
 	/*
-	 * Turn on/off output or set intermediate power levels if available.
+	 * Turn on/off output.
 	 *
-	 * Unsupported intermediate modes drop to the lower power setting.
-	 * If the  mode is DPMSModeOff, the output must be disabled,
-	 * as the DPLL may be disabled afterwards.
+	 * Because none of our dvo drivers support an intermediate power levels,
+	 * we don't expose this in the interfac.
 	 */
-	void (*dpms)(struct intel_dvo_device *dvo, int mode);
+	void (*dpms)(struct intel_dvo_device *dvo, bool enable);
 
 	/*
 	 * Callback for testing a video mode for a given output.
diff --git a/drivers/gpu/drm/i915/dvo_ch7017.c b/drivers/gpu/drm/i915/dvo_ch7017.c
index 1ca799a..71e7650 100644
--- a/drivers/gpu/drm/i915/dvo_ch7017.c
+++ b/drivers/gpu/drm/i915/dvo_ch7017.c
@@ -163,7 +163,7 @@ struct ch7017_priv {
 };
 
 static void ch7017_dump_regs(struct intel_dvo_device *dvo);
-static void ch7017_dpms(struct intel_dvo_device *dvo, int mode);
+static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable);
 
 static bool ch7017_read(struct intel_dvo_device *dvo, u8 addr, u8 *val)
 {
@@ -309,7 +309,7 @@ static void ch7017_mode_set(struct intel_dvo_device *dvo,
 	lvds_power_down = CH7017_LVDS_POWER_DOWN_DEFAULT_RESERVED |
 			  (mode->hdisplay & 0x0700) >> 8;
 
-	ch7017_dpms(dvo, DRM_MODE_DPMS_OFF);
+	ch7017_dpms(dvo, false);
 	ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT,
 			horizontal_active_pixel_input);
 	ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT,
@@ -331,7 +331,7 @@ static void ch7017_mode_set(struct intel_dvo_device *dvo,
 }
 
 /* set the CH7017 power state */
-static void ch7017_dpms(struct intel_dvo_device *dvo, int mode)
+static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable)
 {
 	uint8_t val;
 
@@ -345,7 +345,7 @@ static void ch7017_dpms(struct intel_dvo_device *dvo, int mode)
 			CH7017_DAC3_POWER_DOWN |
 			CH7017_TV_POWER_DOWN_EN);
 
-	if (mode == DRM_MODE_DPMS_ON) {
+	if (enable) {
 		/* Turn on the LVDS */
 		ch7017_write(dvo, CH7017_LVDS_POWER_DOWN,
 			     val & ~CH7017_LVDS_POWER_DOWN_EN);
diff --git a/drivers/gpu/drm/i915/dvo_ch7xxx.c b/drivers/gpu/drm/i915/dvo_ch7xxx.c
index 4a03660..c1dea5b 100644
--- a/drivers/gpu/drm/i915/dvo_ch7xxx.c
+++ b/drivers/gpu/drm/i915/dvo_ch7xxx.c
@@ -289,9 +289,9 @@ static void ch7xxx_mode_set(struct intel_dvo_device *dvo,
 }
 
 /* set the CH7xxx power state */
-static void ch7xxx_dpms(struct intel_dvo_device *dvo, int mode)
+static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
 {
-	if (mode == DRM_MODE_DPMS_ON)
+	if (enable)
 		ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP);
 	else
 		ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
diff --git a/drivers/gpu/drm/i915/dvo_ivch.c b/drivers/gpu/drm/i915/dvo_ivch.c
index 04f2893..fa8ff6b 100644
--- a/drivers/gpu/drm/i915/dvo_ivch.c
+++ b/drivers/gpu/drm/i915/dvo_ivch.c
@@ -288,7 +288,7 @@ static enum drm_mode_status ivch_mode_valid(struct intel_dvo_device *dvo,
 }
 
 /** Sets the power state of the panel connected to the ivch */
-static void ivch_dpms(struct intel_dvo_device *dvo, int mode)
+static void ivch_dpms(struct intel_dvo_device *dvo, bool enable)
 {
 	int i;
 	uint16_t vr01, vr30, backlight;
@@ -297,13 +297,13 @@ static void ivch_dpms(struct intel_dvo_device *dvo, int mode)
 	if (!ivch_read(dvo, VR01, &vr01))
 		return;
 
-	if (mode == DRM_MODE_DPMS_ON)
+	if (enable)
 		backlight = 1;
 	else
 		backlight = 0;
 	ivch_write(dvo, VR80, backlight);
 
-	if (mode == DRM_MODE_DPMS_ON)
+	if (enable)
 		vr01 |= VR01_LCD_ENABLE | VR01_DVO_ENABLE;
 	else
 		vr01 &= ~(VR01_LCD_ENABLE | VR01_DVO_ENABLE);
@@ -315,7 +315,7 @@ static void ivch_dpms(struct intel_dvo_device *dvo, int mode)
 		if (!ivch_read(dvo, VR30, &vr30))
 			break;
 
-		if (((vr30 & VR30_PANEL_ON) != 0) == (mode == DRM_MODE_DPMS_ON))
+		if (((vr30 & VR30_PANEL_ON) != 0) == enable)
 			break;
 		udelay(1000);
 	}
diff --git a/drivers/gpu/drm/i915/dvo_sil164.c b/drivers/gpu/drm/i915/dvo_sil164.c
index a0b13a6..cc24c1c 100644
--- a/drivers/gpu/drm/i915/dvo_sil164.c
+++ b/drivers/gpu/drm/i915/dvo_sil164.c
@@ -208,7 +208,7 @@ static void sil164_mode_set(struct intel_dvo_device *dvo,
 }
 
 /* set the SIL164 power state */
-static void sil164_dpms(struct intel_dvo_device *dvo, int mode)
+static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
 {
 	int ret;
 	unsigned char ch;
@@ -217,7 +217,7 @@ static void sil164_dpms(struct intel_dvo_device *dvo, int mode)
 	if (ret == false)
 		return;
 
-	if (mode == DRM_MODE_DPMS_ON)
+	if (enable)
 		ch |= SIL164_8_PD;
 	else
 		ch &= ~SIL164_8_PD;
diff --git a/drivers/gpu/drm/i915/dvo_tfp410.c b/drivers/gpu/drm/i915/dvo_tfp410.c
index aa2cd3e..097b3e8 100644
--- a/drivers/gpu/drm/i915/dvo_tfp410.c
+++ b/drivers/gpu/drm/i915/dvo_tfp410.c
@@ -234,14 +234,14 @@ static void tfp410_mode_set(struct intel_dvo_device *dvo,
 }
 
 /* set the tfp410 power state */
-static void tfp410_dpms(struct intel_dvo_device *dvo, int mode)
+static void tfp410_dpms(struct intel_dvo_device *dvo, bool enable)
 {
 	uint8_t ctl1;
 
 	if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))
 		return;
 
-	if (mode == DRM_MODE_DPMS_ON)
+	if (enable)
 		ctl1 |= TFP410_CTL_1_PD;
 	else
 		ctl1 &= ~TFP410_CTL_1_PD;
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 60ba50b9..d72584a 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -107,9 +107,9 @@ static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
 	if (mode == DRM_MODE_DPMS_ON) {
 		I915_WRITE(dvo_reg, temp | DVO_ENABLE);
 		I915_READ(dvo_reg);
-		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, mode);
+		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 	} else {
-		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, mode);
+		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
 		I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
 		I915_READ(dvo_reg);
 	}
-- 
1.7.7.6

[PATCH 19/43] drm/i915: simplify possible_clones computation

[Daniel Vetter]

Intel hw only has one MUX for encoders, so outputs are not cloneable
or all in the same group of cloneable outputs. This neatly simplifies
the code and allows us to ditch some ugly if cascades in the dp and
hdmi init code (well, we need these if cascades for other stuff still,
but that can be taken care of in follow-up patches).

Also explain why sdvo LVDS outputs can be cloned. Native LVDS (and
also eDP) can't be cloned, because the panel fitter is before the
ouput MUX (and for cpu eDP cloning isn't possible, anyway).

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c     |    4 +--
 drivers/gpu/drm/i915/intel_display.c |   18 +++++++++++----
 drivers/gpu/drm/i915/intel_dp.c      |   14 ++---------
 drivers/gpu/drm/i915/intel_drv.h     |   25 ++++-----------------
 drivers/gpu/drm/i915/intel_dvo.c     |   39 +++++++++++++++++++++++++++------
 drivers/gpu/drm/i915/intel_hdmi.c    |   10 +-------
 drivers/gpu/drm/i915/intel_lvds.c    |    2 +-
 drivers/gpu/drm/i915/intel_sdvo.c    |   14 ++++++------
 drivers/gpu/drm/i915/intel_tv.c      |    2 +-
 9 files changed, 65 insertions(+), 63 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 9525822..c3f6680 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -690,9 +690,7 @@ void intel_crt_init(struct drm_device *dev)
 	intel_connector_attach_encoder(intel_connector, &crt->base);
 
 	crt->base.type = INTEL_OUTPUT_ANALOG;
-	crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT |
-				1 << INTEL_ANALOG_CLONE_BIT |
-				1 << INTEL_SDVO_LVDS_CLONE_BIT);
+	crt->base.cloneable = true;
 	if (IS_HASWELL(dev))
 		crt->base.crtc_mask = (1 << 0);
 	else
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 62acf98..11e1b10 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6678,15 +6678,23 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
 	return 0;
 }
 
-static int intel_encoder_clones(struct drm_device *dev, int type_mask)
+static int intel_encoder_clones(struct intel_encoder *encoder)
 {
-	struct intel_encoder *encoder;
+	struct drm_device *dev = encoder->base.dev;
+	struct intel_encoder *source_encoder;
 	int index_mask = 0;
 	int entry = 0;
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
-		if (type_mask & encoder->clone_mask)
+	list_for_each_entry(source_encoder,
+			    &dev->mode_config.encoder_list, base.head) {
+
+		if (encoder == source_encoder)
 			index_mask |= (1 << entry);
+
+		/* Intel hw has only one MUX where enocoders could be cloned. */
+		if (encoder->cloneable && source_encoder->cloneable)
+			index_mask |= (1 << entry);
+
 		entry++;
 	}
 
@@ -6845,7 +6853,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
 		encoder->base.possible_crtcs = encoder->crtc_mask;
 		encoder->base.possible_clones =
-			intel_encoder_clones(dev, encoder->clone_mask);
+			intel_encoder_clones(encoder);
 	}
 
 	/* disable all the possible outputs/crtcs before entering KMS mode */
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index b8abbff..b7db872 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2479,18 +2479,10 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 
-	if (output_reg == DP_B || output_reg == PCH_DP_B)
-		intel_encoder->clone_mask = (1 << INTEL_DP_B_CLONE_BIT);
-	else if (output_reg == DP_C || output_reg == PCH_DP_C)
-		intel_encoder->clone_mask = (1 << INTEL_DP_C_CLONE_BIT);
-	else if (output_reg == DP_D || output_reg == PCH_DP_D)
-		intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT);
+	intel_encoder->cloneable = false;
 
-	if (is_edp(intel_dp)) {
-		intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT);
-		INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
-				  ironlake_panel_vdd_work);
-	}
+	INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
+			  ironlake_panel_vdd_work);
 
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 40f50c2..53a8b8d 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -89,25 +89,6 @@
 #define INTEL_OUTPUT_DISPLAYPORT 7
 #define INTEL_OUTPUT_EDP 8
 
-/* Intel Pipe Clone Bit */
-#define INTEL_HDMIB_CLONE_BIT 1
-#define INTEL_HDMIC_CLONE_BIT 2
-#define INTEL_HDMID_CLONE_BIT 3
-#define INTEL_HDMIE_CLONE_BIT 4
-#define INTEL_HDMIF_CLONE_BIT 5
-#define INTEL_SDVO_NON_TV_CLONE_BIT 6
-#define INTEL_SDVO_TV_CLONE_BIT 7
-#define INTEL_SDVO_LVDS_CLONE_BIT 8
-#define INTEL_ANALOG_CLONE_BIT 9
-#define INTEL_TV_CLONE_BIT 10
-#define INTEL_DP_B_CLONE_BIT 11
-#define INTEL_DP_C_CLONE_BIT 12
-#define INTEL_DP_D_CLONE_BIT 13
-#define INTEL_LVDS_CLONE_BIT 14
-#define INTEL_DVO_TMDS_CLONE_BIT 15
-#define INTEL_DVO_LVDS_CLONE_BIT 16
-#define INTEL_EDP_CLONE_BIT 17
-
 #define INTEL_DVO_CHIP_NONE 0
 #define INTEL_DVO_CHIP_LVDS 1
 #define INTEL_DVO_CHIP_TMDS 2
@@ -153,11 +134,15 @@ struct intel_encoder {
 	int type;
 	bool needs_tv_clock;
 	bool connectors_active;
+	/*
+	 * Intel hw has only one MUX where encoders could be clone, hence a
+	 * simple flag is enough to compute the possible_clones mask.
+	 */
+	bool cloneable;
 	void (*hot_plug)(struct intel_encoder *);
 	void (*enable)(struct intel_encoder *);
 	void (*disable)(struct intel_encoder *);
 	int crtc_mask;
-	int clone_mask;
 };
 
 struct intel_connector {
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index d72584a..86a3d2b 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -97,6 +97,30 @@ static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
 			    struct intel_dvo, base);
 }
 
+static void intel_disable_dvo(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+	struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
+	u32 dvo_reg = intel_dvo->dev.dvo_reg;
+	u32 temp = I915_READ(dvo_reg);
+
+	intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
+	I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
+	I915_READ(dvo_reg);
+}
+
+static void intel_enable_dvo(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+	struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
+	u32 dvo_reg = intel_dvo->dev.dvo_reg;
+	u32 temp = I915_READ(dvo_reg);
+
+	I915_WRITE(dvo_reg, temp | DVO_ENABLE);
+	I915_READ(dvo_reg);
+	intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
+}
+
 static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
@@ -269,9 +293,10 @@ static void intel_dvo_destroy(struct drm_connector *connector)
 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 	.dpms = intel_dvo_dpms,
 	.mode_fixup = intel_dvo_mode_fixup,
-	.prepare = intel_encoder_prepare,
+	.prepare = intel_encoder_noop,
 	.mode_set = intel_dvo_mode_set,
-	.commit = intel_encoder_commit,
+	.commit = intel_encoder_noop,
+	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
@@ -364,6 +389,9 @@ void intel_dvo_init(struct drm_device *dev)
 	drm_encoder_init(dev, &intel_encoder->base,
 			 &intel_dvo_enc_funcs, encoder_type);
 
+	intel_encoder->disable = intel_disable_dvo;
+	intel_encoder->enable = intel_enable_dvo;
+
 	/* Now, try to find a controller */
 	for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 		struct drm_connector *connector = &intel_connector->base;
@@ -396,17 +424,14 @@ void intel_dvo_init(struct drm_device *dev)
 		intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 		switch (dvo->type) {
 		case INTEL_DVO_CHIP_TMDS:
-			intel_encoder->clone_mask =
-				(1 << INTEL_DVO_TMDS_CLONE_BIT) |
-				(1 << INTEL_ANALOG_CLONE_BIT);
+			intel_encoder->cloneable = true;
 			drm_connector_init(dev, connector,
 					   &intel_dvo_connector_funcs,
 					   DRM_MODE_CONNECTOR_DVII);
 			encoder_type = DRM_MODE_ENCODER_TMDS;
 			break;
 		case INTEL_DVO_CHIP_LVDS:
-			intel_encoder->clone_mask =
-				(1 << INTEL_DVO_LVDS_CLONE_BIT);
+			intel_encoder->cloneable = false;
 			drm_connector_init(dev, connector,
 					   &intel_dvo_connector_funcs,
 					   DRM_MODE_CONNECTOR_LVDS);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 188399f..b01900d 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -959,42 +959,36 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 	connector->doublescan_allowed = 0;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 
+	intel_encoder->cloneable = false;
+
 	/* Set up the DDC bus. */
 	if (sdvox_reg == SDVOB) {
-		intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == SDVOC) {
-		intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIB) {
-		intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIC) {
-		intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMID) {
-		intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == DDI_BUF_CTL(PORT_B)) {
 		DRM_DEBUG_DRIVER("LPT: detected output on DDI B\n");
-		intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		intel_hdmi->ddi_port = PORT_B;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == DDI_BUF_CTL(PORT_C)) {
 		DRM_DEBUG_DRIVER("LPT: detected output on DDI C\n");
-		intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 		intel_hdmi->ddi_port = PORT_C;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == DDI_BUF_CTL(PORT_D)) {
 		DRM_DEBUG_DRIVER("LPT: detected output on DDI D\n");
-		intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 		intel_hdmi->ddi_port = PORT_D;
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 9ae7fc9..3a42474 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -943,7 +943,7 @@ bool intel_lvds_init(struct drm_device *dev)
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_LVDS;
 
-	intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
+	intel_encoder->cloneable = false;
 	if (HAS_PCH_SPLIT(dev))
 		intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 	else if (IS_GEN4(dev))
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index d630db8..5fe044c 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -2129,8 +2129,7 @@ intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device)
 		connector->connector_type = DRM_MODE_CONNECTOR_HDMIA;
 		intel_sdvo->is_hdmi = true;
 	}
-	intel_sdvo->base.clone_mask = ((1 << INTEL_SDVO_NON_TV_CLONE_BIT) |
-				       (1 << INTEL_ANALOG_CLONE_BIT));
+	intel_sdvo->base.cloneable= true;
 
 	intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
 	if (intel_sdvo->is_hdmi)
@@ -2161,7 +2160,7 @@ intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int type)
 
 	intel_sdvo->is_tv = true;
 	intel_sdvo->base.needs_tv_clock = true;
-	intel_sdvo->base.clone_mask = 1 << INTEL_SDVO_TV_CLONE_BIT;
+	intel_sdvo->base.cloneable = false;
 
 	intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
 
@@ -2204,8 +2203,7 @@ intel_sdvo_analog_init(struct intel_sdvo *intel_sdvo, int device)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB1;
 	}
 
-	intel_sdvo->base.clone_mask = ((1 << INTEL_SDVO_NON_TV_CLONE_BIT) |
-				       (1 << INTEL_ANALOG_CLONE_BIT));
+	intel_sdvo->base.cloneable = true;
 
 	intel_sdvo_connector_init(intel_sdvo_connector,
 				  intel_sdvo);
@@ -2237,8 +2235,10 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS1;
 	}
 
-	intel_sdvo->base.clone_mask = ((1 << INTEL_ANALOG_CLONE_BIT) |
-				       (1 << INTEL_SDVO_LVDS_CLONE_BIT));
+	/* SDVO LVDS is cloneable because the SDVO encoder does the upscaling,
+	 * as opposed to native LVDS, where we upscale with the panel-fitter
+	 * (and hence only the native LVDS resolution could be cloned). */
+	intel_sdvo->base.cloneable = true;
 
 	intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
 	if (!intel_sdvo_create_enhance_property(intel_sdvo, intel_sdvo_connector))
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index e2169d2..3189f24 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1628,7 +1628,7 @@ intel_tv_init(struct drm_device *dev)
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_TVOUT;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
-	intel_encoder->clone_mask = (1 << INTEL_TV_CLONE_BIT);
+	intel_encoder->cloneable = false;
 	intel_encoder->base.possible_crtcs = ((1 << 0) | (1 << 1));
 	intel_encoder->base.possible_clones = (1 << INTEL_OUTPUT_TVOUT);
 	intel_tv->type = DRM_MODE_CONNECTOR_Unknown;
-- 
1.7.7.6

[PATCH 20/43] drm/i915: add port parameter to intel_hdmi_init

[Daniel Vetter]

Instead of having a giant if cascade to figure this out according to
the passed-in register. We could do quite a bit more cleaning up and
all by using the port at more places, but I think this should be part
of a bigger rework to introduce a struct intel_digital_port which
would keep track of all these things. I guess this will be part of
some haswell-DP-induced refactoring.

For now this rips out the big cascade, which is what annoyed me so
much.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_ddi.c     |    2 +-
 drivers/gpu/drm/i915/intel_display.c |   14 +++++-----
 drivers/gpu/drm/i915/intel_drv.h     |    2 +-
 drivers/gpu/drm/i915/intel_hdmi.c    |   41 ++++++++++------------------------
 4 files changed, 21 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b71303c..c2d8389 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -241,7 +241,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
 	case PORT_B:
 	case PORT_C:
 	case PORT_D:
-		intel_hdmi_init(dev, DDI_BUF_CTL(port));
+		intel_hdmi_init(dev, DDI_BUF_CTL(port), port);
 		break;
 	default:
 		DRM_DEBUG_DRIVER("No handlers defined for port %d, skipping DDI initialization\n",
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 11e1b10..8548bb2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6769,16 +6769,16 @@ static void intel_setup_outputs(struct drm_device *dev)
 			/* PCH SDVOB multiplex with HDMIB */
 			found = intel_sdvo_init(dev, PCH_SDVOB, true);
 			if (!found)
-				intel_hdmi_init(dev, HDMIB);
+				intel_hdmi_init(dev, HDMIB, PORT_B);
 			if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
 				intel_dp_init(dev, PCH_DP_B);
 		}
 
 		if (I915_READ(HDMIC) & PORT_DETECTED)
-			intel_hdmi_init(dev, HDMIC);
+			intel_hdmi_init(dev, HDMIC, PORT_C);
 
 		if (!dpd_is_edp && I915_READ(HDMID) & PORT_DETECTED)
-			intel_hdmi_init(dev, HDMID);
+			intel_hdmi_init(dev, HDMID, PORT_D);
 
 		if (I915_READ(PCH_DP_C) & DP_DETECTED)
 			intel_dp_init(dev, PCH_DP_C);
@@ -6792,13 +6792,13 @@ static void intel_setup_outputs(struct drm_device *dev)
 			/* SDVOB multiplex with HDMIB */
 			found = intel_sdvo_init(dev, SDVOB, true);
 			if (!found)
-				intel_hdmi_init(dev, SDVOB);
+				intel_hdmi_init(dev, SDVOB, PORT_B);
 			if (!found && (I915_READ(DP_B) & DP_DETECTED))
 				intel_dp_init(dev, DP_B);
 		}
 
 		if (I915_READ(SDVOC) & PORT_DETECTED)
-			intel_hdmi_init(dev, SDVOC);
+			intel_hdmi_init(dev, SDVOC, PORT_C);
 
 		/* Shares lanes with HDMI on SDVOC */
 		if (I915_READ(DP_C) & DP_DETECTED)
@@ -6811,7 +6811,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 			found = intel_sdvo_init(dev, SDVOB, true);
 			if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
 				DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
-				intel_hdmi_init(dev, SDVOB);
+				intel_hdmi_init(dev, SDVOB, PORT_B);
 			}
 
 			if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
@@ -6831,7 +6831,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 
 			if (SUPPORTS_INTEGRATED_HDMI(dev)) {
 				DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
-				intel_hdmi_init(dev, SDVOC);
+				intel_hdmi_init(dev, SDVOC, PORT_C);
 			}
 			if (SUPPORTS_INTEGRATED_DP(dev)) {
 				DRM_DEBUG_KMS("probing DP_C\n");
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 53a8b8d..5cc4b3c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -331,7 +331,7 @@ extern void intel_attach_force_audio_property(struct drm_connector *connector);
 extern void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
 
 extern void intel_crt_init(struct drm_device *dev);
-extern void intel_hdmi_init(struct drm_device *dev, int sdvox_reg);
+extern void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port);
 extern struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder);
 extern void intel_dip_infoframe_csum(struct dip_infoframe *avi_if);
 extern bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index b01900d..1332367 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -925,7 +925,7 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
 	intel_attach_broadcast_rgb_property(connector);
 }
 
-void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
+void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_connector *connector;
@@ -961,40 +961,23 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 
 	intel_encoder->cloneable = false;
 
-	/* Set up the DDC bus. */
-	if (sdvox_reg == SDVOB) {
+	intel_hdmi->ddi_port = port;
+	switch (port) {
+	case PORT_B:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == SDVOC) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMIB) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
-		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMIC) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMID) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
-		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_B)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI B\n");
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
-		intel_hdmi->ddi_port = PORT_B;
-		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_C)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI C\n");
+		break;
+	case PORT_C:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		intel_hdmi->ddi_port = PORT_C;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_D)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI D\n");
+		break;
+	case PORT_D:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
-		intel_hdmi->ddi_port = PORT_D;
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
-	} else {
-		/* If we got an unknown sdvox_reg, things are pretty much broken
-		 * in a way that we should let the kernel know about it */
+		break;
+	case PORT_A:
+		/* Internal port only for eDP. */
+	default:
 		BUG();
 	}
 
-- 
1.7.7.6

[PATCH 21/43] drm/i915: convert dpms functions of dvo/sdvo/crt

[Daniel Vetter]

Yeah, big patch but I couldn't come up with a neat idea of how to
split it up further, that wouldn't break dpms on cloned configs
somehow. But the changes in dvo/sdvo/crt are all pretty much
orthonogal, so it's not too bad a patch.

These are the only encoders that support cloning, which requires a few
special changes compared to the previous patches.
- Compute the desired state of the display pipe by walking all
  connected encoders and checking whether any has active connectors.
  To make this clearer, drop the old mode parameter to the crtc dpms
  function and rename it to intel_crtc_update_dpms.
- There's the curious case of intel_crtc->dpms_mode. With the previous
  patches to remove the overlay pipe A code and to rework the load
  detect pipe code, the big users are gone. We still keep it to avoid
  enabling the pipe twice, but we duplicate this logic with
  crtc->active, too. Still, leave this for now and just push a fake
  dpms mode into it that reflects the state of the display pipe.

Changes in the encoder dpms functions:
- We clamp the dpms state to the supported range right away. This is
  escpecially important for the VGA outputs, where only older hw
  supports the intermediate states. This (and the crt->adpa_reg patch)
  allows us to unify the crt dpms code again between all variants
  (gmch, vlv and pch).
- We only enable/disable the output for dvo/sdvo and leave the encoder
  running. The encoder will be disabled/enabled when we switch the
  state of the entire output pipeline (which will happen right away
  for non-cloned setups). This way the duplication is reduced and
  strange interaction when disabling output ports at the wrong time
  avoided.

The dpms code for all three types of connectors contains a bit of
duplicated logic, but I think keeping these special cases separate is
simpler: CRT is the only one that hanldes intermediate dpms state
(which requires extra logic to enable/disable things in the right
order), and introducing some abstraction just to share the code
between dvo and sdvo smells like overkill. We can do that once someone
bothers to implement cloning for the more modern outputs. But I doubt
that this will ever happen.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c     |   97 +++++++++++++++++----------------
 drivers/gpu/drm/i915/intel_display.c |   37 ++++++-------
 drivers/gpu/drm/i915/intel_drv.h     |    1 +
 drivers/gpu/drm/i915/intel_dvo.c     |   39 ++++++++++----
 drivers/gpu/drm/i915/intel_sdvo.c    |   60 +++++++++------------
 5 files changed, 122 insertions(+), 112 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index c3f6680..3cca437 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -84,13 +84,17 @@ static void intel_enable_crt(struct intel_encoder *encoder)
 	I915_WRITE(crt->adpa_reg, temp);
 }
 
-static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
+/* Note: The caller is required to filter out dpms modes not supported by the
+ * platform. */
+static void intel_crtc_set_dpms(struct intel_encoder *encoder, int mode)
 {
-	struct drm_device *dev = encoder->dev;
+	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crt *crt = intel_encoder_to_crt(encoder);
 	u32 temp;
 
-	temp = I915_READ(PCH_ADPA);
+	temp = I915_READ(crt->adpa_reg);
+	temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
 	temp &= ~ADPA_DAC_ENABLE;
 
 	switch (mode) {
@@ -98,44 +102,59 @@ static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
 		temp |= ADPA_DAC_ENABLE;
 		break;
 	case DRM_MODE_DPMS_STANDBY:
+		temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
+		break;
 	case DRM_MODE_DPMS_SUSPEND:
+		temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
+		break;
 	case DRM_MODE_DPMS_OFF:
-		/* Just leave port enable cleared */
+		temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
 		break;
 	}
 
-	I915_WRITE(PCH_ADPA, temp);
+	I915_WRITE(crt->adpa_reg, temp);
 }
 
-static void gmch_crt_dpms(struct drm_encoder *encoder, int mode)
+static void intel_crt_dpms(struct drm_connector *connector, int mode)
 {
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 temp;
-
-	temp = I915_READ(ADPA);
-	temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
-	temp &= ~ADPA_DAC_ENABLE;
+	struct drm_device *dev = connector->dev;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct drm_crtc *crtc;
+	int old_dpms;
 
-	if (IS_VALLEYVIEW(dev) && mode != DRM_MODE_DPMS_ON)
+	/* PCH platforms and VLV only support on/off. */
+	if (INTEL_INFO(dev)->gen < 5 && mode != DRM_MODE_DPMS_ON)
 		mode = DRM_MODE_DPMS_OFF;
 
-	switch (mode) {
-	case DRM_MODE_DPMS_ON:
-		temp |= ADPA_DAC_ENABLE;
-		break;
-	case DRM_MODE_DPMS_STANDBY:
-		temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
-		break;
-	case DRM_MODE_DPMS_SUSPEND:
-		temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
-		break;
-	case DRM_MODE_DPMS_OFF:
-		temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
-		break;
+	if (mode == connector->dpms)
+		return;
+
+	old_dpms = connector->dpms;
+	connector->dpms = mode;
+
+	/* Only need to change hw state when actually enabled */
+	crtc = encoder->base.crtc;
+	if (!crtc) {
+		encoder->connectors_active = false;
+		return;
 	}
 
-	I915_WRITE(ADPA, temp);
+	/* We need the pipe to run for anything but OFF. */
+	if (mode == DRM_MODE_DPMS_OFF)
+		encoder->connectors_active = false;
+	else
+		encoder->connectors_active = true;
+
+	if (mode < old_dpms) {
+		/* From off to on, enable the pipe first. */
+		intel_crtc_update_dpms(crtc);
+
+		intel_crtc_set_dpms(encoder, mode);
+	} else {
+		intel_crtc_set_dpms(encoder, mode);
+
+		intel_crtc_update_dpms(crtc);
+	}
 }
 
 static int intel_crt_mode_valid(struct drm_connector *connector,
@@ -603,27 +622,17 @@ static void intel_crt_reset(struct drm_connector *connector)
  * Routines for controlling stuff on the analog port
  */
 
-static const struct drm_encoder_helper_funcs pch_encoder_funcs = {
-	.mode_fixup = intel_crt_mode_fixup,
-	.prepare = intel_encoder_noop,
-	.commit = intel_encoder_noop,
-	.mode_set = intel_crt_mode_set,
-	.dpms = pch_crt_dpms,
-	.disable = intel_encoder_disable,
-};
-
-static const struct drm_encoder_helper_funcs gmch_encoder_funcs = {
+static const struct drm_encoder_helper_funcs crt_encoder_funcs = {
 	.mode_fixup = intel_crt_mode_fixup,
 	.prepare = intel_encoder_noop,
 	.commit = intel_encoder_noop,
 	.mode_set = intel_crt_mode_set,
-	.dpms = gmch_crt_dpms,
 	.disable = intel_encoder_disable,
 };
 
 static const struct drm_connector_funcs intel_crt_connector_funcs = {
 	.reset = intel_crt_reset,
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_crt_dpms,
 	.detect = intel_crt_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = intel_crt_destroy,
@@ -664,7 +673,6 @@ void intel_crt_init(struct drm_device *dev)
 	struct intel_crt *crt;
 	struct intel_connector *intel_connector;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 
 	/* Skip machines without VGA that falsely report hotplug events */
 	if (dmi_check_system(intel_no_crt))
@@ -703,11 +711,6 @@ void intel_crt_init(struct drm_device *dev)
 	connector->doublescan_allowed = 0;
 
 	if (HAS_PCH_SPLIT(dev))
-		encoder_helper_funcs = &pch_encoder_funcs;
-	else
-		encoder_helper_funcs = &gmch_encoder_funcs;
-
-	if (HAS_PCH_SPLIT(dev))
 		crt->adpa_reg = PCH_ADPA;
 	else if (IS_VALLEYVIEW(dev))
 		crt->adpa_reg = VLV_ADPA;
@@ -717,7 +720,7 @@ void intel_crt_init(struct drm_device *dev)
 	crt->base.disable = intel_disable_crt;
 	crt->base.enable = intel_enable_crt;
 
-	drm_encoder_helper_add(&crt->base.base, encoder_helper_funcs);
+	drm_encoder_helper_add(&crt->base.base, &crt_encoder_funcs);
 	drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 
 	drm_sysfs_connector_add(connector);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8548bb2..222bb41 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3419,34 +3419,31 @@ static void i9xx_crtc_off(struct drm_crtc *crtc)
 /**
  * Sets the power management mode of the pipe and plane.
  */
-static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
+void intel_crtc_update_dpms(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_encoder *intel_encoder;
 	int pipe = intel_crtc->pipe;
-	bool enabled;
+	bool enabled, enable = false;
+	int mode;
+
+	for_each_encoder_on_crtc(dev, crtc, intel_encoder)
+		enable |= intel_encoder->connectors_active;
+
+	mode = enable ? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF;
 
 	if (intel_crtc->dpms_mode == mode)
 		return;
 
 	intel_crtc->dpms_mode = mode;
 
-	/* XXX: When our outputs are all unaware of DPMS modes other than off
-	 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
-	 */
-	switch (mode) {
-	case DRM_MODE_DPMS_ON:
-	case DRM_MODE_DPMS_STANDBY:
-	case DRM_MODE_DPMS_SUSPEND:
+	if (enable)
 		dev_priv->display.crtc_enable(crtc);
-		break;
-
-	case DRM_MODE_DPMS_OFF:
+	else
 		dev_priv->display.crtc_disable(crtc);
-		break;
-	}
 
 	if (!dev->primary->master)
 		return;
@@ -3455,7 +3452,7 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
 	if (!master_priv->sarea_priv)
 		return;
 
-	enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
+	enabled = crtc->enabled && enable;
 
 	switch (pipe) {
 	case 0:
@@ -3474,11 +3471,12 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
 
 static void intel_crtc_disable(struct drm_crtc *crtc)
 {
-	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
+	/* crtc->disable is only called when we have no encoders, hence this
+	 * will disable the pipe. */
+	intel_crtc_update_dpms(crtc);
 	dev_priv->display.off(crtc);
 
 	assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
@@ -3538,11 +3536,11 @@ void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
 	if (mode == DRM_MODE_DPMS_ON) {
 		encoder->connectors_active = true;
 
-		intel_crtc_dpms(encoder->base.crtc, DRM_MODE_DPMS_ON);
+		intel_crtc_update_dpms(encoder->base.crtc);
 	} else {
 		encoder->connectors_active = false;
 
-		intel_crtc_dpms(encoder->base.crtc, DRM_MODE_DPMS_OFF);
+		intel_crtc_update_dpms(encoder->base.crtc);
 	}
 }
 
@@ -6571,7 +6569,6 @@ static void intel_crtc_reset(struct drm_crtc *crtc)
 }
 
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
-	.dpms = intel_crtc_dpms,
 	.mode_fixup = intel_crtc_mode_fixup,
 	.mode_set = intel_crtc_mode_set,
 	.mode_set_base = intel_pipe_set_base,
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5cc4b3c..d081158 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -374,6 +374,7 @@ extern void intel_panel_destroy_backlight(struct drm_device *dev);
 extern enum drm_connector_status intel_panel_detect(struct drm_device *dev);
 
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
+extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
 extern void intel_encoder_prepare(struct drm_encoder *encoder);
 extern void intel_encoder_commit(struct drm_encoder *encoder);
 extern void intel_encoder_noop(struct drm_encoder *encoder);
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 86a3d2b..8a188f4 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -121,21 +121,39 @@ static void intel_enable_dvo(struct intel_encoder *encoder)
 	intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 }
 
-static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
+static void intel_dvo_dpms(struct drm_connector *connector, int mode)
 {
-	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
-	struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
-	u32 dvo_reg = intel_dvo->dev.dvo_reg;
-	u32 temp = I915_READ(dvo_reg);
+	struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
+	struct drm_crtc *crtc;
+
+	/* dvo supports only 2 dpms states. */
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
+	if (mode == connector->dpms)
+		return;
+
+	connector->dpms = mode;
+
+	/* Only need to change hw state when actually enabled */
+	crtc = intel_dvo->base.base.crtc;
+	if (!crtc) {
+		intel_dvo->base.connectors_active = false;
+		return;
+	}
 
 	if (mode == DRM_MODE_DPMS_ON) {
-		I915_WRITE(dvo_reg, temp | DVO_ENABLE);
-		I915_READ(dvo_reg);
+		intel_dvo->base.connectors_active = true;
+
+		intel_crtc_update_dpms(crtc);
+
 		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 	} else {
 		intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
-		I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
-		I915_READ(dvo_reg);
+
+		intel_dvo->base.connectors_active = false;
+
+		intel_crtc_update_dpms(crtc);
 	}
 }
 
@@ -291,7 +309,6 @@ static void intel_dvo_destroy(struct drm_connector *connector)
 }
 
 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
-	.dpms = intel_dvo_dpms,
 	.mode_fixup = intel_dvo_mode_fixup,
 	.prepare = intel_encoder_noop,
 	.mode_set = intel_dvo_mode_set,
@@ -300,7 +317,7 @@ static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 };
 
 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_dvo_dpms,
 	.detect = intel_dvo_detect,
 	.destroy = intel_dvo_destroy,
 	.fill_modes = drm_helper_probe_single_connector_modes,
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 5fe044c..284513b 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1189,51 +1189,44 @@ static void intel_enable_sdvo(struct intel_encoder *encoder)
 	intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
 }
 
-static void intel_sdvo_dpms(struct drm_encoder *encoder, int mode)
+static void intel_sdvo_dpms(struct drm_connector *connector, int mode)
 {
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_sdvo *intel_sdvo = to_intel_sdvo(encoder);
-	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
-	u32 temp;
+	struct drm_crtc *crtc;
+	struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
+
+	/* dvo supports only 2 dpms states. */
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
+	if (mode == connector->dpms)
+		return;
+
+	connector->dpms = mode;
+
+	/* Only need to change hw state when actually enabled */
+	crtc = intel_sdvo->base.base.crtc;
+	if (!crtc) {
+		intel_sdvo->base.connectors_active = false;
+		return;
+	}
 
 	if (mode != DRM_MODE_DPMS_ON) {
 		intel_sdvo_set_active_outputs(intel_sdvo, 0);
 		if (0)
 			intel_sdvo_set_encoder_power_state(intel_sdvo, mode);
 
-		if (mode == DRM_MODE_DPMS_OFF) {
-			temp = I915_READ(intel_sdvo->sdvo_reg);
-			if ((temp & SDVO_ENABLE) != 0) {
-				intel_sdvo_write_sdvox(intel_sdvo, temp & ~SDVO_ENABLE);
-			}
-		}
+		intel_sdvo->base.connectors_active = false;
+
+		intel_crtc_update_dpms(crtc);
 	} else {
-		bool input1, input2;
-		int i;
-		u8 status;
-
-		temp = I915_READ(intel_sdvo->sdvo_reg);
-		if ((temp & SDVO_ENABLE) == 0)
-			intel_sdvo_write_sdvox(intel_sdvo, temp | SDVO_ENABLE);
-		for (i = 0; i < 2; i++)
-			intel_wait_for_vblank(dev, intel_crtc->pipe);
-
-		status = intel_sdvo_get_trained_inputs(intel_sdvo, &input1, &input2);
-		/* Warn if the device reported failure to sync.
-		 * A lot of SDVO devices fail to notify of sync, but it's
-		 * a given it the status is a success, we succeeded.
-		 */
-		if (status == SDVO_CMD_STATUS_SUCCESS && !input1) {
-			DRM_DEBUG_KMS("First %s output reported failure to "
-					"sync\n", SDVO_NAME(intel_sdvo));
-		}
+		intel_sdvo->base.connectors_active = true;
+
+		intel_crtc_update_dpms(crtc);
 
 		if (0)
 			intel_sdvo_set_encoder_power_state(intel_sdvo, mode);
 		intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
 	}
-	return;
 }
 
 static int intel_sdvo_mode_valid(struct drm_connector *connector,
@@ -1892,7 +1885,6 @@ done:
 }
 
 static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
-	.dpms = intel_sdvo_dpms,
 	.mode_fixup = intel_sdvo_mode_fixup,
 	.prepare = intel_encoder_noop,
 	.mode_set = intel_sdvo_mode_set,
@@ -1901,7 +1893,7 @@ static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
 };
 
 static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
-	.dpms = drm_helper_connector_dpms,
+	.dpms = intel_sdvo_dpms,
 	.detect = intel_sdvo_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = intel_sdvo_set_property,
-- 
1.7.7.6

[PATCH 22/43] drm/i915: rip out encoder->disable/enable checks

[Daniel Vetter]

All encoders are now converted so there's no need for these checks any
more.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   24 ++++++++----------------
 1 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 222bb41..d30306a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3205,10 +3205,8 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 	intel_crtc_update_cursor(crtc, true);
 
 encoders:
-	for_each_encoder_on_crtc(dev, crtc, encoder) {
-		if (encoder->enable)
-			encoder->enable(encoder);
-	}
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		encoder->enable(encoder);
 }
 
 static void ironlake_crtc_disable(struct drm_crtc *crtc)
@@ -3223,10 +3221,8 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 
 	/* XXX: For compatability with the crtc helper code, call the encoder's
 	 * disable function unconditionally for now. */
-	for_each_encoder_on_crtc(dev, crtc, encoder) {
-		if (encoder->disable)
-			encoder->disable(encoder);
-	}
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		encoder->disable(encoder);
 
 	if (!intel_crtc->active)
 		return;
@@ -3369,10 +3365,8 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
 	intel_crtc_update_cursor(crtc, true);
 
 encoders:
-	for_each_encoder_on_crtc(dev, crtc, encoder) {
-		if (encoder->enable)
-			encoder->enable(encoder);
-	}
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		encoder->enable(encoder);
 }
 
 static void i9xx_crtc_disable(struct drm_crtc *crtc)
@@ -3386,10 +3380,8 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 
 	/* XXX: For compatability with the crtc helper code, call the encoder's
 	 * disable function unconditionally for now. */
-	for_each_encoder_on_crtc(dev, crtc, encoder) {
-		if (encoder->disable)
-			encoder->disable(encoder);
-	}
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		encoder->disable(encoder);
 
 	if (!intel_crtc->active)
 		return;
-- 
1.7.7.6

[PATCH 23/43] drm/i915: clean up encoder_prepare/commit

[Daniel Vetter]

We no longer need them. And now that all encoders are converted, we
can finally move the cpt modeset check to the right place - at the end
of the crtc_enable function.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   23 +++--------------------
 drivers/gpu/drm/i915/intel_drv.h     |    2 --
 2 files changed, 3 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d30306a..d716634 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3207,6 +3207,9 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 encoders:
 	for_each_encoder_on_crtc(dev, crtc, encoder)
 		encoder->enable(encoder);
+
+	if (HAS_PCH_CPT(dev))
+		intel_cpt_verify_modeset(dev, intel_crtc->pipe);
 }
 
 static void ironlake_crtc_disable(struct drm_crtc *crtc)
@@ -3481,26 +3484,6 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
 	}
 }
 
-void intel_encoder_prepare(struct drm_encoder *encoder)
-{
-	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
-	/* lvds has its own version of prepare see intel_lvds_prepare */
-	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
-}
-
-void intel_encoder_commit(struct drm_encoder *encoder)
-{
-	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
-	struct drm_device *dev = encoder->dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
-
-	/* lvds has its own version of commit see intel_lvds_commit */
-	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
-
-	if (HAS_PCH_CPT(dev))
-		intel_cpt_verify_modeset(dev, intel_crtc->pipe);
-}
-
 void intel_encoder_noop(struct drm_encoder *encoder)
 {
 }
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d081158..5099440 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -375,8 +375,6 @@ extern enum drm_connector_status intel_panel_detect(struct drm_device *dev);
 
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
 extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
-extern void intel_encoder_prepare(struct drm_encoder *encoder);
-extern void intel_encoder_commit(struct drm_encoder *encoder);
 extern void intel_encoder_noop(struct drm_encoder *encoder);
 extern void intel_encoder_disable(struct drm_encoder *encoder);
 extern void intel_encoder_destroy(struct drm_encoder *encoder);
-- 
1.7.7.6

[PATCH 24/43] drm/fb helper: don't call drm_crtc_helper_set_config

[Daniel Vetter]

Go through the interface vtable instead, because not everyone might be
using the crtc helper code.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_fb_helper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 5683b7f..bf97c0a 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -228,7 +228,7 @@ bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 	int i, ret;
 	for (i = 0; i < fb_helper->crtc_count; i++) {
 		struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
-		ret = drm_crtc_helper_set_config(mode_set);
+		ret = mode_set->crtc->funcs->set_config(mode_set);
 		if (ret)
 			error = true;
 	}
-- 
1.7.7.6

[PATCH 25/43] drm: remove the list_head from drm_mode_set

[Daniel Vetter]

It's unused. At it confused me quite a bit until I've discovered that.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 include/drm/drm_crtc.h |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index bac55c2..a1a0386 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -676,8 +676,6 @@ struct drm_plane {
  * This is used to set modes.
  */
 struct drm_mode_set {
-	struct list_head head;
-
 	struct drm_framebuffer *fb;
 	struct drm_crtc *crtc;
 	struct drm_display_mode *mode;
-- 
1.7.7.6

[PATCH 26/43] drm/i915: copy&paste drm_crtc_helper_set_config

[Daniel Vetter]

And the following static functions required by it:
drm_encoder_crtc_ok, drm_crtc_helper_disable

No changes safe for the s/drm/intel prefix change.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |  314 +++++++++++++++++++++++++++++++++-
 1 files changed, 313 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d716634..72c415b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6552,12 +6552,324 @@ static struct drm_crtc_helper_funcs intel_helper_funcs = {
 	.disable = intel_crtc_disable,
 };
 
+static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
+				  struct drm_crtc *crtc)
+{
+	struct drm_device *dev;
+	struct drm_crtc *tmp;
+	int crtc_mask = 1;
+
+	WARN(!crtc, "checking null crtc?\n");
+
+	dev = crtc->dev;
+
+	list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
+		if (tmp == crtc)
+			break;
+		crtc_mask <<= 1;
+	}
+
+	if (encoder->possible_crtcs & crtc_mask)
+		return true;
+	return false;
+}
+
+static int
+intel_crtc_helper_disable(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+
+	/* Decouple all encoders and their attached connectors from this crtc */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		if (encoder->crtc != crtc)
+			continue;
+
+		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+			if (connector->encoder != encoder)
+				continue;
+
+			connector->encoder = NULL;
+		}
+	}
+
+	drm_helper_disable_unused_functions(dev);
+	return 0;
+}
+
+static int intel_crtc_set_config(struct drm_mode_set *set)
+{
+	struct drm_device *dev;
+	struct drm_crtc *save_crtcs, *new_crtc, *crtc;
+	struct drm_encoder *save_encoders, *new_encoder, *encoder;
+	struct drm_framebuffer *old_fb = NULL;
+	bool mode_changed = false; /* if true do a full mode set */
+	bool fb_changed = false; /* if true and !mode_changed just do a flip */
+	struct drm_connector *save_connectors, *connector;
+	int count = 0, ro, fail = 0;
+	struct drm_crtc_helper_funcs *crtc_funcs;
+	struct drm_mode_set save_set;
+	int ret;
+	int i;
+
+	DRM_DEBUG_KMS("\n");
+
+	if (!set)
+		return -EINVAL;
+
+	if (!set->crtc)
+		return -EINVAL;
+
+	if (!set->crtc->helper_private)
+		return -EINVAL;
+
+	crtc_funcs = set->crtc->helper_private;
+
+	if (!set->mode)
+		set->fb = NULL;
+
+	if (set->fb) {
+		DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
+				set->crtc->base.id, set->fb->base.id,
+				(int)set->num_connectors, set->x, set->y);
+	} else {
+		DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
+		return intel_crtc_helper_disable(set->crtc);
+	}
+
+	dev = set->crtc->dev;
+
+	/* Allocate space for the backup of all (non-pointer) crtc, encoder and
+	 * connector data. */
+	save_crtcs = kzalloc(dev->mode_config.num_crtc *
+			     sizeof(struct drm_crtc), GFP_KERNEL);
+	if (!save_crtcs)
+		return -ENOMEM;
+
+	save_encoders = kzalloc(dev->mode_config.num_encoder *
+				sizeof(struct drm_encoder), GFP_KERNEL);
+	if (!save_encoders) {
+		kfree(save_crtcs);
+		return -ENOMEM;
+	}
+
+	save_connectors = kzalloc(dev->mode_config.num_connector *
+				sizeof(struct drm_connector), GFP_KERNEL);
+	if (!save_connectors) {
+		kfree(save_crtcs);
+		kfree(save_encoders);
+		return -ENOMEM;
+	}
+
+	/* Copy data. Note that driver private data is not affected.
+	 * Should anything bad happen only the expected state is
+	 * restored, not the drivers personal bookkeeping.
+	 */
+	count = 0;
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		save_crtcs[count++] = *crtc;
+	}
+
+	count = 0;
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		save_encoders[count++] = *encoder;
+	}
+
+	count = 0;
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		save_connectors[count++] = *connector;
+	}
+
+	save_set.crtc = set->crtc;
+	save_set.mode = &set->crtc->mode;
+	save_set.x = set->crtc->x;
+	save_set.y = set->crtc->y;
+	save_set.fb = set->crtc->fb;
+
+	/* We should be able to check here if the fb has the same properties
+	 * and then just flip_or_move it */
+	if (set->crtc->fb != set->fb) {
+		/* If we have no fb then treat it as a full mode set */
+		if (set->crtc->fb == NULL) {
+			DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
+			mode_changed = true;
+		} else if (set->fb == NULL) {
+			mode_changed = true;
+		} else if (set->fb->depth != set->crtc->fb->depth) {
+			mode_changed = true;
+		} else if (set->fb->bits_per_pixel !=
+			   set->crtc->fb->bits_per_pixel) {
+			mode_changed = true;
+		} else
+			fb_changed = true;
+	}
+
+	if (set->x != set->crtc->x || set->y != set->crtc->y)
+		fb_changed = true;
+
+	if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
+		DRM_DEBUG_KMS("modes are different, full mode set\n");
+		drm_mode_debug_printmodeline(&set->crtc->mode);
+		drm_mode_debug_printmodeline(set->mode);
+		mode_changed = true;
+	}
+
+	/* a) traverse passed in connector list and get encoders for them */
+	count = 0;
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		struct drm_connector_helper_funcs *connector_funcs =
+			connector->helper_private;
+		new_encoder = connector->encoder;
+		for (ro = 0; ro < set->num_connectors; ro++) {
+			if (set->connectors[ro] == connector) {
+				new_encoder = connector_funcs->best_encoder(connector);
+				/* if we can't get an encoder for a connector
+				   we are setting now - then fail */
+				if (new_encoder == NULL)
+					/* don't break so fail path works correct */
+					fail = 1;
+				break;
+			}
+		}
+
+		if (new_encoder != connector->encoder) {
+			DRM_DEBUG_KMS("encoder changed, full mode switch\n");
+			mode_changed = true;
+			/* If the encoder is reused for another connector, then
+			 * the appropriate crtc will be set later.
+			 */
+			if (connector->encoder)
+				connector->encoder->crtc = NULL;
+			connector->encoder = new_encoder;
+		}
+	}
+
+	if (fail) {
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	count = 0;
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if (!connector->encoder)
+			continue;
+
+		if (connector->encoder->crtc == set->crtc)
+			new_crtc = NULL;
+		else
+			new_crtc = connector->encoder->crtc;
+
+		for (ro = 0; ro < set->num_connectors; ro++) {
+			if (set->connectors[ro] == connector)
+				new_crtc = set->crtc;
+		}
+
+		/* Make sure the new CRTC will work with the encoder */
+		if (new_crtc &&
+		    !intel_encoder_crtc_ok(connector->encoder, new_crtc)) {
+			ret = -EINVAL;
+			goto fail;
+		}
+		if (new_crtc != connector->encoder->crtc) {
+			DRM_DEBUG_KMS("crtc changed, full mode switch\n");
+			mode_changed = true;
+			connector->encoder->crtc = new_crtc;
+		}
+		if (new_crtc) {
+			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
+				connector->base.id, drm_get_connector_name(connector),
+				new_crtc->base.id);
+		} else {
+			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
+				connector->base.id, drm_get_connector_name(connector));
+		}
+	}
+
+	/* mode_set_base is not a required function */
+	if (fb_changed && !crtc_funcs->mode_set_base)
+		mode_changed = true;
+
+	if (mode_changed) {
+		set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
+		if (set->crtc->enabled) {
+			DRM_DEBUG_KMS("attempting to set mode from"
+					" userspace\n");
+			drm_mode_debug_printmodeline(set->mode);
+			old_fb = set->crtc->fb;
+			set->crtc->fb = set->fb;
+			if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
+						      set->x, set->y,
+						      old_fb)) {
+				DRM_ERROR("failed to set mode on [CRTC:%d]\n",
+					  set->crtc->base.id);
+				set->crtc->fb = old_fb;
+				ret = -EINVAL;
+				goto fail;
+			}
+			DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
+			for (i = 0; i < set->num_connectors; i++) {
+				DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
+					      drm_get_connector_name(set->connectors[i]));
+				set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
+			}
+		}
+		drm_helper_disable_unused_functions(dev);
+	} else if (fb_changed) {
+		set->crtc->x = set->x;
+		set->crtc->y = set->y;
+
+		old_fb = set->crtc->fb;
+		if (set->crtc->fb != set->fb)
+			set->crtc->fb = set->fb;
+		ret = crtc_funcs->mode_set_base(set->crtc,
+						set->x, set->y, old_fb);
+		if (ret != 0) {
+			set->crtc->fb = old_fb;
+			goto fail;
+		}
+	}
+
+	kfree(save_connectors);
+	kfree(save_encoders);
+	kfree(save_crtcs);
+	return 0;
+
+fail:
+	/* Restore all previous data. */
+	count = 0;
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		*crtc = save_crtcs[count++];
+	}
+
+	count = 0;
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		*encoder = save_encoders[count++];
+	}
+
+	count = 0;
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		*connector = save_connectors[count++];
+	}
+
+	/* Try to restore the config */
+	if (mode_changed &&
+	    !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
+				      save_set.y, save_set.fb))
+		DRM_ERROR("failed to restore config after modeset failure\n");
+
+	kfree(save_connectors);
+	kfree(save_encoders);
+	kfree(save_crtcs);
+	return ret;
+}
+
 static const struct drm_crtc_funcs intel_crtc_funcs = {
 	.reset = intel_crtc_reset,
 	.cursor_set = intel_crtc_cursor_set,
 	.cursor_move = intel_crtc_cursor_move,
 	.gamma_set = intel_crtc_gamma_set,
-	.set_config = drm_crtc_helper_set_config,
+	.set_config = intel_crtc_set_config,
 	.destroy = intel_crtc_destroy,
 	.page_flip = intel_crtc_page_flip,
 };
-- 
1.7.7.6

[PATCH 27/43] drm/i915: call set_base directly

[Daniel Vetter]

And drop the check, we always have it.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   11 ++---------
 1 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 72c415b..0fd9085 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6546,7 +6546,6 @@ static void intel_crtc_reset(struct drm_crtc *crtc)
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
 	.mode_fixup = intel_crtc_mode_fixup,
 	.mode_set = intel_crtc_mode_set,
-	.mode_set_base = intel_pipe_set_base,
 	.mode_set_base_atomic = intel_pipe_set_base_atomic,
 	.load_lut = intel_crtc_load_lut,
 	.disable = intel_crtc_disable,
@@ -6608,7 +6607,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	bool fb_changed = false; /* if true and !mode_changed just do a flip */
 	struct drm_connector *save_connectors, *connector;
 	int count = 0, ro, fail = 0;
-	struct drm_crtc_helper_funcs *crtc_funcs;
 	struct drm_mode_set save_set;
 	int ret;
 	int i;
@@ -6624,7 +6622,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	if (!set->crtc->helper_private)
 		return -EINVAL;
 
-	crtc_funcs = set->crtc->helper_private;
 
 	if (!set->mode)
 		set->fb = NULL;
@@ -6786,10 +6783,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 		}
 	}
 
-	/* mode_set_base is not a required function */
-	if (fb_changed && !crtc_funcs->mode_set_base)
-		mode_changed = true;
-
 	if (mode_changed) {
 		set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
 		if (set->crtc->enabled) {
@@ -6822,8 +6815,8 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 		old_fb = set->crtc->fb;
 		if (set->crtc->fb != set->fb)
 			set->crtc->fb = set->fb;
-		ret = crtc_funcs->mode_set_base(set->crtc,
-						set->x, set->y, old_fb);
+		ret = intel_pipe_set_base(set->crtc,
+					  set->x, set->y, old_fb);
 		if (ret != 0) {
 			set->crtc->fb = old_fb;
 			goto fail;
-- 
1.7.7.6

[PATCH 28/43] drm/i915: inline intel_best_encoder

[Daniel Vetter]

Also kill the error-path, we have a fixed connector-encoder mapping.

Unfortunately we can't rip out all the ->best_encoder callbacks, these
are all still used by the fb_helper. Neat helper layering violation there.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   18 +++---------------
 1 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0fd9085..0c15960 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6606,7 +6606,7 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	bool mode_changed = false; /* if true do a full mode set */
 	bool fb_changed = false; /* if true and !mode_changed just do a flip */
 	struct drm_connector *save_connectors, *connector;
-	int count = 0, ro, fail = 0;
+	int count = 0, ro;
 	struct drm_mode_set save_set;
 	int ret;
 	int i;
@@ -6622,7 +6622,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	if (!set->crtc->helper_private)
 		return -EINVAL;
 
-
 	if (!set->mode)
 		set->fb = NULL;
 
@@ -6715,17 +6714,11 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	/* a) traverse passed in connector list and get encoders for them */
 	count = 0;
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		struct drm_connector_helper_funcs *connector_funcs =
-			connector->helper_private;
 		new_encoder = connector->encoder;
 		for (ro = 0; ro < set->num_connectors; ro++) {
 			if (set->connectors[ro] == connector) {
-				new_encoder = connector_funcs->best_encoder(connector);
-				/* if we can't get an encoder for a connector
-				   we are setting now - then fail */
-				if (new_encoder == NULL)
-					/* don't break so fail path works correct */
-					fail = 1;
+				new_encoder =
+					&intel_attached_encoder(connector)->base;
 				break;
 			}
 		}
@@ -6742,11 +6735,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 		}
 	}
 
-	if (fail) {
-		ret = -EINVAL;
-		goto fail;
-	}
-
 	count = 0;
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (!connector->encoder)
-- 
1.7.7.6

[PATCH 29/43] drm/i915: copy&paste drm_crtc_helper_set_mode

[Daniel Vetter]

Together with the static helpers drm_crtc_prepare_encoders and
drm_encoder_disable (which will be simplified in the next patch, but
for now are 1:1 copies). Again, no changes beside new names for these
functions.

Also call our new set_mode instead of the crtc helper one now in all
the places we've done so far.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |  160 +++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_dp.c      |    6 +-
 drivers/gpu/drm/i915/intel_drv.h     |    4 +
 drivers/gpu/drm/i915/intel_hdmi.c    |    6 +-
 drivers/gpu/drm/i915/intel_lvds.c    |    5 +-
 drivers/gpu/drm/i915/intel_sdvo.c    |    4 +-
 drivers/gpu/drm/i915/intel_tv.c      |    4 +-
 7 files changed, 173 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0c15960..574a610 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5653,7 +5653,7 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 		goto fail;
 	}
 
-	if (!drm_crtc_helper_set_mode(crtc, mode, 0, 0, old_fb)) {
+	if (!intel_crtc_set_mode(crtc, mode, 0, 0, old_fb)) {
 		DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
 		if (old->release_fb)
 			old->release_fb->funcs->destroy(old->release_fb);
@@ -6597,6 +6597,158 @@ intel_crtc_helper_disable(struct drm_crtc *crtc)
 	return 0;
 }
 
+static void
+intel_encoder_disable_helper(struct drm_encoder *encoder)
+{
+	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+
+	if (encoder_funcs->disable)
+		(*encoder_funcs->disable)(encoder);
+	else
+		(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static void
+intel_crtc_prepare_encoders(struct drm_device *dev)
+{
+	struct drm_encoder_helper_funcs *encoder_funcs;
+	struct drm_encoder *encoder;
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		encoder_funcs = encoder->helper_private;
+		/* Disable unused encoders */
+		if (encoder->crtc == NULL)
+			intel_encoder_disable_helper(encoder);
+		/* Disable encoders whose CRTC is about to change */
+		if (encoder_funcs->get_crtc &&
+		    encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
+			intel_encoder_disable_helper(encoder);
+	}
+}
+
+bool intel_crtc_set_mode(struct drm_crtc *crtc,
+			 struct drm_display_mode *mode,
+			 int x, int y,
+			 struct drm_framebuffer *old_fb)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
+	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+	struct drm_encoder_helper_funcs *encoder_funcs;
+	int saved_x, saved_y;
+	struct drm_encoder *encoder;
+	bool ret = true;
+
+	crtc->enabled = drm_helper_crtc_in_use(crtc);
+	if (!crtc->enabled)
+		return true;
+
+	adjusted_mode = drm_mode_duplicate(dev, mode);
+	if (!adjusted_mode)
+		return false;
+
+	saved_hwmode = crtc->hwmode;
+	saved_mode = crtc->mode;
+	saved_x = crtc->x;
+	saved_y = crtc->y;
+
+	/* Update crtc values up front so the driver can rely on them for mode
+	 * setting.
+	 */
+	crtc->mode = *mode;
+	crtc->x = x;
+	crtc->y = y;
+
+	/* Pass our mode to the connectors and the CRTC to give them a chance to
+	 * adjust it according to limitations or connector properties, and also
+	 * a chance to reject the mode entirely.
+	 */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+
+		if (encoder->crtc != crtc)
+			continue;
+		encoder_funcs = encoder->helper_private;
+		if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
+						      adjusted_mode))) {
+			DRM_DEBUG_KMS("Encoder fixup failed\n");
+			goto done;
+		}
+	}
+
+	if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
+		DRM_DEBUG_KMS("CRTC fixup failed\n");
+		goto done;
+	}
+	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+
+	/* Prepare the encoders and CRTCs before setting the mode. */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+
+		if (encoder->crtc != crtc)
+			continue;
+		encoder_funcs = encoder->helper_private;
+		/* Disable the encoders as the first thing we do. */
+		encoder_funcs->prepare(encoder);
+	}
+
+	intel_crtc_prepare_encoders(dev);
+
+	crtc_funcs->prepare(crtc);
+
+	/* Set up the DPLL and any encoders state that needs to adjust or depend
+	 * on the DPLL.
+	 */
+	ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
+	if (!ret)
+	    goto done;
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+
+		if (encoder->crtc != crtc)
+			continue;
+
+		DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
+			encoder->base.id, drm_get_encoder_name(encoder),
+			mode->base.id, mode->name);
+		encoder_funcs = encoder->helper_private;
+		encoder_funcs->mode_set(encoder, mode, adjusted_mode);
+	}
+
+	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
+	crtc_funcs->commit(crtc);
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+
+		if (encoder->crtc != crtc)
+			continue;
+
+		encoder_funcs = encoder->helper_private;
+		encoder_funcs->commit(encoder);
+
+	}
+
+	/* Store real post-adjustment hardware mode. */
+	crtc->hwmode = *adjusted_mode;
+
+	/* Calculate and store various constants which
+	 * are later needed by vblank and swap-completion
+	 * timestamping. They are derived from true hwmode.
+	 */
+	drm_calc_timestamping_constants(crtc);
+
+	/* FIXME: add subpixel order */
+done:
+	drm_mode_destroy(dev, adjusted_mode);
+	if (!ret) {
+		crtc->hwmode = saved_hwmode;
+		crtc->mode = saved_mode;
+		crtc->x = saved_x;
+		crtc->y = saved_y;
+	}
+
+	return ret;
+}
+
 static int intel_crtc_set_config(struct drm_mode_set *set)
 {
 	struct drm_device *dev;
@@ -6779,7 +6931,7 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 			drm_mode_debug_printmodeline(set->mode);
 			old_fb = set->crtc->fb;
 			set->crtc->fb = set->fb;
-			if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
+			if (!intel_crtc_set_mode(set->crtc, set->mode,
 						      set->x, set->y,
 						      old_fb)) {
 				DRM_ERROR("failed to set mode on [CRTC:%d]\n",
@@ -6835,8 +6987,8 @@ fail:
 
 	/* Try to restore the config */
 	if (mode_changed &&
-	    !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
-				      save_set.y, save_set.fb))
+	    !intel_crtc_set_mode(save_set.crtc, save_set.mode, save_set.x,
+				 save_set.y, save_set.fb))
 		DRM_ERROR("failed to restore config after modeset failure\n");
 
 	kfree(save_connectors);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index b7db872..162b000 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2322,9 +2322,9 @@ intel_dp_set_property(struct drm_connector *connector,
 done:
 	if (intel_dp->base.base.crtc) {
 		struct drm_crtc *crtc = intel_dp->base.base.crtc;
-		drm_crtc_helper_set_mode(crtc, &crtc->mode,
-					 crtc->x, crtc->y,
-					 crtc->fb);
+		intel_crtc_set_mode(crtc, &crtc->mode,
+				    crtc->x, crtc->y,
+				    crtc->fb);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5099440..b5544f0 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -373,6 +373,10 @@ extern void intel_panel_disable_backlight(struct drm_device *dev);
 extern void intel_panel_destroy_backlight(struct drm_device *dev);
 extern enum drm_connector_status intel_panel_detect(struct drm_device *dev);
 
+extern bool intel_crtc_set_mode(struct drm_crtc *crtc,
+				struct drm_display_mode *mode,
+				int x, int y,
+				struct drm_framebuffer *old_fb);
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
 extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
 extern void intel_encoder_noop(struct drm_encoder *encoder);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1332367..4b99140 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -869,9 +869,9 @@ intel_hdmi_set_property(struct drm_connector *connector,
 done:
 	if (intel_hdmi->base.base.crtc) {
 		struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
-		drm_crtc_helper_set_mode(crtc, &crtc->mode,
-					 crtc->x, crtc->y,
-					 crtc->fb);
+		intel_crtc_set_mode(crtc, &crtc->mode,
+				    crtc->x, crtc->y,
+				    crtc->fb);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 3a42474..3449706 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -560,8 +560,9 @@ static int intel_lvds_set_property(struct drm_connector *connector,
 			 * If the CRTC is enabled, the display will be changed
 			 * according to the new panel fitting mode.
 			 */
-			drm_crtc_helper_set_mode(crtc, &crtc->mode,
-				crtc->x, crtc->y, crtc->fb);
+			intel_crtc_set_mode(crtc, &crtc->mode,
+					    crtc->x, crtc->y,
+					    crtc->fb);
 		}
 	}
 
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 284513b..35c47db 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1876,8 +1876,8 @@ set_value:
 done:
 	if (intel_sdvo->base.base.crtc) {
 		struct drm_crtc *crtc = intel_sdvo->base.base.crtc;
-		drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x,
-					 crtc->y, crtc->fb);
+		intel_crtc_set_mode(crtc, &crtc->mode,
+				    crtc->x, crtc->y, crtc->fb);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 3189f24..02c1da0 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1477,8 +1477,8 @@ intel_tv_set_property(struct drm_connector *connector, struct drm_property *prop
 	}
 
 	if (changed && crtc)
-		drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x,
-				crtc->y, crtc->fb);
+		intel_crtc_set_mode(crtc, &crtc->mode,
+				    crtc->x, crtc->y, crtc->fb);
 out:
 	return ret;
 }
-- 
1.7.7.6

[PATCH 30/43] drm/i915: simplify intel_crtc_prepare_encoders

[Daniel Vetter]

- We don't have the ->get_crtc callback.
- Call intel_encoder->disable directly.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   25 ++++---------------------
 1 files changed, 4 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 574a610..fefa600 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6598,31 +6598,14 @@ intel_crtc_helper_disable(struct drm_crtc *crtc)
 }
 
 static void
-intel_encoder_disable_helper(struct drm_encoder *encoder)
-{
-	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
-
-	if (encoder_funcs->disable)
-		(*encoder_funcs->disable)(encoder);
-	else
-		(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
-}
-
-static void
 intel_crtc_prepare_encoders(struct drm_device *dev)
 {
-	struct drm_encoder_helper_funcs *encoder_funcs;
-	struct drm_encoder *encoder;
+	struct intel_encoder *encoder;
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		encoder_funcs = encoder->helper_private;
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
 		/* Disable unused encoders */
-		if (encoder->crtc == NULL)
-			intel_encoder_disable_helper(encoder);
-		/* Disable encoders whose CRTC is about to change */
-		if (encoder_funcs->get_crtc &&
-		    encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
-			intel_encoder_disable_helper(encoder);
+		if (encoder->base.crtc == NULL)
+			encoder->disable(encoder);
 	}
 }
 
-- 
1.7.7.6

[PATCH 31/43] drm/i915: rip out encoder->prepare/commit

[Daniel Vetter]

With the new infrastructure we're doing this when enabling/disabling
the entire display pipe.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c     |    2 --
 drivers/gpu/drm/i915/intel_display.c |   24 ------------------------
 drivers/gpu/drm/i915/intel_dp.c      |    2 --
 drivers/gpu/drm/i915/intel_drv.h     |    1 -
 drivers/gpu/drm/i915/intel_dvo.c     |    2 --
 drivers/gpu/drm/i915/intel_hdmi.c    |    4 ----
 drivers/gpu/drm/i915/intel_lvds.c    |    2 --
 drivers/gpu/drm/i915/intel_sdvo.c    |    2 --
 drivers/gpu/drm/i915/intel_tv.c      |    2 --
 9 files changed, 0 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 3cca437..7ea986c 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -624,8 +624,6 @@ static void intel_crt_reset(struct drm_connector *connector)
 
 static const struct drm_encoder_helper_funcs crt_encoder_funcs = {
 	.mode_fixup = intel_crt_mode_fixup,
-	.prepare = intel_encoder_noop,
-	.commit = intel_encoder_noop,
 	.mode_set = intel_crt_mode_set,
 	.disable = intel_encoder_disable,
 };
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fefa600..4d31b30 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3484,10 +3484,6 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
 	}
 }
 
-void intel_encoder_noop(struct drm_encoder *encoder)
-{
-}
-
 void intel_encoder_disable(struct drm_encoder *encoder)
 {
 	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
@@ -6664,16 +6660,6 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 	}
 	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
 
-	/* Prepare the encoders and CRTCs before setting the mode. */
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-
-		if (encoder->crtc != crtc)
-			continue;
-		encoder_funcs = encoder->helper_private;
-		/* Disable the encoders as the first thing we do. */
-		encoder_funcs->prepare(encoder);
-	}
-
 	intel_crtc_prepare_encoders(dev);
 
 	crtc_funcs->prepare(crtc);
@@ -6700,16 +6686,6 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
 	crtc_funcs->commit(crtc);
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-
-		if (encoder->crtc != crtc)
-			continue;
-
-		encoder_funcs = encoder->helper_private;
-		encoder_funcs->commit(encoder);
-
-	}
-
 	/* Store real post-adjustment hardware mode. */
 	crtc->hwmode = *adjusted_mode;
 
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 162b000..5b4498f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2359,9 +2359,7 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
 	.mode_fixup = intel_dp_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_dp_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index b5544f0..70a8e10 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -379,7 +379,6 @@ extern bool intel_crtc_set_mode(struct drm_crtc *crtc,
 				struct drm_framebuffer *old_fb);
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
 extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
-extern void intel_encoder_noop(struct drm_encoder *encoder);
 extern void intel_encoder_disable(struct drm_encoder *encoder);
 extern void intel_encoder_destroy(struct drm_encoder *encoder);
 extern void intel_encoder_dpms(struct intel_encoder *encoder, int mode);
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 8a188f4..34cbe8c 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -310,9 +310,7 @@ static void intel_dvo_destroy(struct drm_connector *connector)
 
 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 	.mode_fixup = intel_dvo_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_dvo_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 4b99140..1782357 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -886,17 +886,13 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs_hsw = {
 	.mode_fixup = intel_hdmi_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_ddi_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 	.mode_fixup = intel_hdmi_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_hdmi_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 3449706..7fb4bc1 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -571,9 +571,7 @@ static int intel_lvds_set_property(struct drm_connector *connector,
 
 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
 	.mode_fixup = intel_lvds_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_lvds_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 35c47db..92763d5 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1886,9 +1886,7 @@ done:
 
 static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
 	.mode_fixup = intel_sdvo_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_sdvo_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable
 };
 
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 02c1da0..2fce753 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1485,9 +1485,7 @@ out:
 
 static const struct drm_encoder_helper_funcs intel_tv_helper_funcs = {
 	.mode_fixup = intel_tv_mode_fixup,
-	.prepare = intel_encoder_noop,
 	.mode_set = intel_tv_mode_set,
-	.commit = intel_encoder_noop,
 	.disable = intel_encoder_disable,
 };
 
-- 
1.7.7.6

[PATCH 32/43] drm/i915: call crtc functions directly

[Daniel Vetter]

Instead of going through the crtc helper function tables.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   15 +++++----------
 1 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4d31b30..0c4eca5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6540,8 +6540,6 @@ static void intel_crtc_reset(struct drm_crtc *crtc)
 }
 
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
-	.mode_fixup = intel_crtc_mode_fixup,
-	.mode_set = intel_crtc_mode_set,
 	.mode_set_base_atomic = intel_pipe_set_base_atomic,
 	.load_lut = intel_crtc_load_lut,
 	.disable = intel_crtc_disable,
@@ -6611,8 +6609,8 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 			 struct drm_framebuffer *old_fb)
 {
 	struct drm_device *dev = crtc->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
-	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 	struct drm_encoder_helper_funcs *encoder_funcs;
 	int saved_x, saved_y;
 	struct drm_encoder *encoder;
@@ -6654,7 +6652,7 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 		}
 	}
 
-	if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
+	if (!(ret = intel_crtc_mode_fixup(crtc, mode, adjusted_mode))) {
 		DRM_DEBUG_KMS("CRTC fixup failed\n");
 		goto done;
 	}
@@ -6662,12 +6660,12 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 
 	intel_crtc_prepare_encoders(dev);
 
-	crtc_funcs->prepare(crtc);
+	dev_priv->display.crtc_disable(crtc);
 
 	/* Set up the DPLL and any encoders state that needs to adjust or depend
 	 * on the DPLL.
 	 */
-	ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
+	ret = !intel_crtc_mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
 	if (!ret)
 	    goto done;
 
@@ -6684,7 +6682,7 @@ bool intel_crtc_set_mode(struct drm_crtc *crtc,
 	}
 
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
-	crtc_funcs->commit(crtc);
+	dev_priv->display.crtc_enable(crtc);
 
 	/* Store real post-adjustment hardware mode. */
 	crtc->hwmode = *adjusted_mode;
@@ -7019,9 +7017,6 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	intel_crtc->active = true; /* force the pipe off on setup_init_config */
 	intel_crtc->bpp = 24; /* default for pre-Ironlake */
 
-	intel_helper_funcs.prepare = dev_priv->display.crtc_disable;
-	intel_helper_funcs.commit = dev_priv->display.crtc_enable;
-
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
 
 	intel_crtc->busy = false;
-- 
1.7.7.6

[PATCH 33/43] drm/i915: WARN when trying to enabled an unused crtc

[Daniel Vetter]

This is the first tiny step towards cross-checking the entire modeset
state machine with WARNs. A crtc can only be enabled when it's
actually in use, i.e. crtc->active imlies crtc->enabled.

Unfortunately we can't (yet) check this when disabling the crtc,
because the crtc helpers are a bit slopy with updating state and
unconditionally update crtc->enabled before changing the hw state.

Fixing that requires quite some more work.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |    4 ++++
 drivers/gpu/drm/i915/intel_drv.h     |   10 +++++++++-
 2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0c4eca5..e01cd09 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3153,6 +3153,8 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 	u32 temp;
 	bool is_pch_port;
 
+	WARN_ON(!crtc->enabled);
+
 	/* XXX: For compatability with the crtc helper code, call the encoder's
 	 * enable function unconditionally for now. */
 	if (intel_crtc->active)
@@ -3348,6 +3350,8 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
 
+	WARN_ON(!crtc->enabled);
+
 	/* XXX: For compatability with the crtc helper code, call the encoder's
 	 * enable function unconditionally for now. */
 	if (intel_crtc->active)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 70a8e10..8714f00 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -156,7 +156,15 @@ struct intel_crtc {
 	enum plane plane;
 	u8 lut_r[256], lut_g[256], lut_b[256];
 	int dpms_mode;
-	bool active; /* is the crtc on? independent of the dpms mode */
+	/*
+	 * Whether the crtc and the connected output pipeline is active. Implies
+	 * that crtc->enabled is set, i.e. the current mode configuration has
+	 * some outputs connected to this crtc.
+	 *
+	 * Atm crtc->enabled is unconditionally updated _before_ the hw state is
+	 * changed, hence we can only check this when enabling the crtc.
+	 */
+	bool active;
 	bool primary_disabled; /* is the crtc obscured by a plane? */
 	bool busy; /* is scanout buffer being updated frequently? */
 	struct timer_list idle_timer;
-- 
1.7.7.6

[PATCH 34/43] drm/i915: Add interfaces to read out encoder/connector hw state

[Daniel Vetter]

It is all glorious if we try really hard to only enable an entire
display pipe to ensure that everyting happens in the right order. But
if we don't know the output configuration when the driver takes over,
this will all be for vain because we'll make the hw angry right on the
first modeset.

Hence we need to be able to read out the current hw state, so that we
can properly tear down the current hw state on the first modeset.
Obviously this is also a nice preparation for the fastboot work, where
we try to avoid the modeset on driver load if it matches what the hw
is currently using.

Furthermore we'll be using these functions to cross-check the actual
hw state with what we think it should be, to ensure that the modeset
state machine actually works as advertised.

This patch only contains the interface definitions and a little helper
for the simple case.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   11 +++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |    8 ++++++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e01cd09..d423b9a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3541,6 +3541,17 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
 		encoder->connectors_active = false;
 }
 
+/* Simple connector->get_hw_state implementation for encoders that support only
+ * one connector and no cloning and hence the encoder state determines the state
+ * of the connector. */
+bool intel_connector_get_hw_state(struct intel_connector *connector)
+{
+	enum pipe pipe;
+	struct intel_encoder *encoder = connector->encoder;
+
+	return encoder->get_hw_state(encoder, &pipe);
+}
+
 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
 				  struct drm_display_mode *mode,
 				  struct drm_display_mode *adjusted_mode)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8714f00..45dd067 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -142,12 +142,19 @@ struct intel_encoder {
 	void (*hot_plug)(struct intel_encoder *);
 	void (*enable)(struct intel_encoder *);
 	void (*disable)(struct intel_encoder *);
+	/* Read out the current hw state of this connector, returning true if
+	 * the encoder is active. If the encoder is enabled it also set the pipe
+	 * it is connected to in the pipe parameter. */
+	bool (*get_hw_state)(struct intel_encoder *, enum pipe *pipe);
 	int crtc_mask;
 };
 
 struct intel_connector {
 	struct drm_connector base;
 	struct intel_encoder *encoder;
+	/* Reads out the current hw, returning true if the connector is enabled
+	 * and active (i.e. dpms ON state). */
+	bool (*get_hw_state)(struct intel_connector *);
 };
 
 struct intel_crtc {
@@ -391,6 +398,7 @@ extern void intel_encoder_disable(struct drm_encoder *encoder);
 extern void intel_encoder_destroy(struct drm_encoder *encoder);
 extern void intel_encoder_dpms(struct intel_encoder *encoder, int mode);
 extern void intel_connector_dpms(struct drm_connector *, int mode);
+extern bool intel_connector_get_hw_state(struct intel_connector *connector);
 
 static inline struct intel_encoder *intel_attached_encoder(struct drm_connector *connector)
 {
-- 
1.7.7.6

[PATCH 35/43] drm/i915/dp: implement get_hw_state

[Daniel Vetter]

Also add some macros to make the pipe computation a bit easier.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_reg.h |    2 +
 drivers/gpu/drm/i915/intel_dp.c |   50 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 3b9c65e..428c3f3 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4008,6 +4008,8 @@
 #define  PORT_TRANS_C_SEL_CPT	(2<<29)
 #define  PORT_TRANS_SEL_MASK	(3<<29)
 #define  PORT_TRANS_SEL_CPT(pipe)	((pipe) << 29)
+#define  PORT_TO_PIPE_CPT(val)	(((val) & (1<<30)) >> 30)
+#define  PORT_TO_PIPE(val)	(((val) & PORT_TRANS_SEL_MASK) >> 29)
 
 #define TRANS_DP_CTL_A		0xe0300
 #define TRANS_DP_CTL_B		0xe1300
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 5b4498f..648c6e5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1277,6 +1277,54 @@ static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
 	}
 }
 
+static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
+				  enum pipe *pipe)
+{
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 tmp = I915_READ(intel_dp->output_reg);
+
+	if (!(tmp & DP_PORT_EN))
+		return false;
+
+	if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) {
+		*pipe = PORT_TO_PIPE_CPT(tmp);
+	} else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) {
+		*pipe = PORT_TO_PIPE(tmp);
+	} else {
+		u32 trans_sel;
+		u32 trans_dp;
+		int i;
+
+		switch (intel_dp->output_reg) {
+		case PCH_DP_B:
+			trans_sel = TRANS_DP_PORT_SEL_B;
+			break;
+		case PCH_DP_C:
+			trans_sel = TRANS_DP_PORT_SEL_C;
+			break;
+		case PCH_DP_D:
+			trans_sel = TRANS_DP_PORT_SEL_D;
+			break;
+		default:
+			return true;
+		}
+
+		for_each_pipe(i) {
+			trans_dp = I915_READ(TRANS_DP_CTL(i));
+			if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) {
+				*pipe = i;
+				return true;
+			}
+		}
+	}
+
+	DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg);
+
+	return true;
+}
+
 static void intel_disable_dp(struct intel_encoder *encoder)
 {
 	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@@ -2496,6 +2544,8 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 
 	intel_encoder->enable = intel_enable_dp;
 	intel_encoder->disable = intel_disable_dp;
+	intel_encoder->get_hw_state = intel_dp_get_hw_state;
+	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	/* Set up the DDC bus. */
 	switch (output_reg) {
-- 
1.7.7.6

[PATCH 36/43] drm/i915/hdmi: implement get_hw_state

[Daniel Vetter]

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_ddi.c  |   29 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h  |    2 ++
 drivers/gpu/drm/i915/intel_hdmi.c |   24 ++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index c2d8389..08d5a1e 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -729,6 +729,35 @@ void intel_ddi_mode_set(struct drm_encoder *encoder,
 	intel_hdmi->set_infoframes(encoder, adjusted_mode);
 }
 
+bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
+			    enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
+	u32 tmp;
+	int i;
+
+	tmp = I915_READ(DDI_BUF_CTL(intel_hdmi->ddi_port));
+
+	if (!(tmp & DDI_BUF_CTL_ENABLE))
+		return false;
+
+	for_each_pipe(i) {
+		tmp = I915_READ(DDI_FUNC_CTL(i));
+
+		if ((tmp & PIPE_DDI_PORT_MASK)
+		    == PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port)) {
+			*pipe = i;
+			return true;
+		}
+	}
+
+	DRM_DEBUG_KMS("No pipe for ddi port %i found\n", intel_hdmi->ddi_port);
+
+	return true;
+}
+
 void intel_enable_ddi(struct intel_encoder *encoder)
 {
 	struct drm_device *dev = encoder->base.dev;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 45dd067..aad231e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -506,6 +506,8 @@ extern void intel_disable_gt_powersave(struct drm_device *dev);
 
 extern void intel_enable_ddi(struct intel_encoder *encoder);
 extern void intel_disable_ddi(struct intel_encoder *encoder);
+extern bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
+				   enum pipe *pipe);
 extern void intel_ddi_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1782357..3ccf7fd 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -601,6 +601,27 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 	intel_hdmi->set_infoframes(encoder, adjusted_mode);
 }
 
+static bool intel_hdmi_get_hw_state(struct intel_encoder *encoder,
+				    enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
+	u32 tmp;
+
+	tmp = I915_READ(intel_hdmi->sdvox_reg);
+
+	if (!(tmp & SDVO_ENABLE))
+		return false;
+
+	if (HAS_PCH_CPT(dev))
+		*pipe = PORT_TO_PIPE_CPT(tmp);
+	else
+		*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 static void intel_enable_hdmi(struct intel_encoder *encoder)
 {
 	struct drm_device *dev = encoder->base.dev;
@@ -999,14 +1020,17 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 	if (IS_HASWELL(dev)) {
 		intel_encoder->enable = intel_enable_ddi;
 		intel_encoder->disable = intel_disable_ddi;
+		intel_encoder->get_hw_state = intel_ddi_get_hw_state;
 		drm_encoder_helper_add(&intel_encoder->base,
 				       &intel_hdmi_helper_funcs_hsw);
 	} else {
 		intel_encoder->enable = intel_enable_hdmi;
 		intel_encoder->disable = intel_disable_hdmi;
+		intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
 		drm_encoder_helper_add(&intel_encoder->base,
 				       &intel_hdmi_helper_funcs);
 	}
+	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 
 	intel_hdmi_add_properties(intel_hdmi, connector);
-- 
1.7.7.6

[PATCH 37/43] drm/i915/tv: implement get_hw_state

[Daniel Vetter]

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_tv.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 2fce753..5920c5f 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -836,6 +836,21 @@ static struct intel_tv *intel_attached_tv(struct drm_connector *connector)
 			    base);
 }
 
+static bool
+intel_tv_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 tmp = I915_READ(TV_CTL);
+
+	if (!(tmp & TV_ENC_ENABLE))
+		return false;
+
+	*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 static void
 intel_enable_tv(struct intel_encoder *encoder)
 {
@@ -1622,6 +1637,8 @@ intel_tv_init(struct drm_device *dev)
 
 	intel_encoder->enable = intel_enable_tv;
 	intel_encoder->disable = intel_disable_tv;
+	intel_encoder->get_hw_state = intel_tv_get_hw_state;
+	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_TVOUT;
-- 
1.7.7.6

[PATCH 38/43] drm/i915/lvds: implement get_hw_state

[Daniel Vetter]

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_lvds.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 7fb4bc1..7bcd4b2 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -65,6 +65,32 @@ static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector)
 			    struct intel_lvds, base);
 }
 
+static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
+				    enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 lvds_reg, tmp;
+
+	if (HAS_PCH_SPLIT(dev)) {
+		lvds_reg = PCH_LVDS;
+	} else {
+		lvds_reg = LVDS;
+	}
+
+	tmp = I915_READ(lvds_reg);
+
+	if (!(tmp & LVDS_PORT_EN))
+		return false;
+
+	if (HAS_PCH_CPT(dev))
+		*pipe = PORT_TO_PIPE_CPT(tmp);
+	else
+		*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 /**
  * Sets the power state for the panel.
  */
@@ -938,6 +964,8 @@ bool intel_lvds_init(struct drm_device *dev)
 
 	intel_encoder->enable = intel_enable_lvds;
 	intel_encoder->disable = intel_disable_lvds;
+	intel_encoder->get_hw_state = intel_lvds_get_hw_state;
+	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_LVDS;
-- 
1.7.7.6

[PATCH 39/43] drm/i915/crt: implement get_hw_state

[Daniel Vetter]

Note that even though this connector is cloneable we have still can
use the exact same test to check whether the connector is on or
whether the output is enabled - both the dpms code and the encoder
disable/enable frob the exact same hw state.

For dvo/sdvo outputs, this will be different.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 7ea986c..0a5b61a 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -61,6 +61,27 @@ static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
 	return container_of(encoder, struct intel_crt, base);
 }
 
+static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
+				   enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crt *crt = intel_encoder_to_crt(encoder);
+	u32 tmp;
+
+	tmp = I915_READ(crt->adpa_reg);
+
+	if (!(tmp & ADPA_DAC_ENABLE))
+		return false;
+
+	if (HAS_PCH_CPT(dev))
+		*pipe = PORT_TO_PIPE_CPT(tmp);
+	else
+		*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 static void intel_disable_crt(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -717,6 +738,8 @@ void intel_crt_init(struct drm_device *dev)
 
 	crt->base.disable = intel_disable_crt;
 	crt->base.enable = intel_enable_crt;
+	crt->base.get_hw_state = intel_crt_get_hw_state;
+	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	drm_encoder_helper_add(&crt->base.base, &crt_encoder_funcs);
 	drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
-- 
1.7.7.6

[PATCH 40/43] drm/i915/sdvo: implement get_hw_state

[Daniel Vetter]

SDVO is the first real special case - we support multiple outputs on
the same encoder and the encoder dpms state isn't the same as when
just disabling the outputs when the encoder is cloned.

Hence we need a real connector get_hw_state function which inquires
the sdvo encoder about its active outputs.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_sdvo.c |   46 +++++++++++++++++++++++++++++++++++++
 1 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 92763d5..65b52a1 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -625,6 +625,14 @@ static bool intel_sdvo_set_active_outputs(struct intel_sdvo *intel_sdvo,
 				    &outputs, sizeof(outputs));
 }
 
+static bool intel_sdvo_get_active_outputs(struct intel_sdvo *intel_sdvo,
+					  u16 *outputs)
+{
+	return intel_sdvo_get_value(intel_sdvo,
+				    SDVO_CMD_GET_ACTIVE_OUTPUTS,
+				    outputs, sizeof(*outputs));
+}
+
 static bool intel_sdvo_set_encoder_power_state(struct intel_sdvo *intel_sdvo,
 					       int mode)
 {
@@ -1139,6 +1147,42 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder,
 	intel_sdvo_write_sdvox(intel_sdvo, sdvox);
 }
 
+static bool intel_sdvo_connector_get_hw_state(struct intel_connector *connector)
+{
+	struct intel_sdvo_connector *intel_sdvo_connector =
+		to_intel_sdvo_connector(&connector->base);
+	struct intel_sdvo *intel_sdvo = intel_attached_sdvo(&connector->base);
+	u16 active_outputs;
+
+	intel_sdvo_get_active_outputs(intel_sdvo, &active_outputs);
+
+	if (active_outputs & intel_sdvo_connector->output_flag)
+		return true;
+	else
+		return false;
+}
+
+static bool intel_sdvo_get_hw_state(struct intel_encoder *encoder,
+				    enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
+	u32 tmp;
+
+	tmp = I915_READ(intel_sdvo->sdvo_reg);
+
+	if (!(tmp & SDVO_ENABLE))
+		return false;
+
+	if (HAS_PCH_CPT(dev))
+		*pipe = PORT_TO_PIPE_CPT(tmp);
+	else
+		*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 static void intel_disable_sdvo(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -2063,6 +2107,7 @@ intel_sdvo_connector_init(struct intel_sdvo_connector *connector,
 	connector->base.base.interlace_allowed = 1;
 	connector->base.base.doublescan_allowed = 0;
 	connector->base.base.display_info.subpixel_order = SubPixelHorizontalRGB;
+	connector->base.get_hw_state = intel_sdvo_connector_get_hw_state;
 
 	intel_connector_attach_encoder(&connector->base, &encoder->base);
 	drm_sysfs_connector_add(&connector->base.base);
@@ -2616,6 +2661,7 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob)
 
 	intel_encoder->disable = intel_disable_sdvo;
 	intel_encoder->enable = intel_enable_sdvo;
+	intel_encoder->get_hw_state = intel_sdvo_get_hw_state;
 
 	/* In default case sdvo lvds is false */
 	if (!intel_sdvo_get_capabilities(intel_sdvo, &intel_sdvo->caps))
-- 
1.7.7.6

[PATCH 41/43] drm/i915/dvo: implement get_hw_state

[Daniel Vetter]

Similar to the sdvo code we poke the dvo encoder whether the output is
active. Safe that dvo encoders are not standardized, so this requires
a new callback into the dvo chip driver.

Hence implement that for all 5 dvo drivers.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/dvo.h        |    6 ++++++
 drivers/gpu/drm/i915/dvo_ch7017.c |   13 +++++++++++++
 drivers/gpu/drm/i915/dvo_ch7xxx.c |   13 +++++++++++++
 drivers/gpu/drm/i915/dvo_ivch.c   |   15 +++++++++++++++
 drivers/gpu/drm/i915/dvo_sil164.c |   16 ++++++++++++++++
 drivers/gpu/drm/i915/dvo_tfp410.c |   14 ++++++++++++++
 drivers/gpu/drm/i915/intel_dvo.c  |   27 +++++++++++++++++++++++++++
 7 files changed, 104 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/dvo.h b/drivers/gpu/drm/i915/dvo.h
index 8efec6d..0ccda16 100644
--- a/drivers/gpu/drm/i915/dvo.h
+++ b/drivers/gpu/drm/i915/dvo.h
@@ -114,6 +114,12 @@ struct intel_dvo_dev_ops {
 	 */
 	enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
 
+	/*
+	 * Probe the current hw status, returning true if the connected output
+	 * is active.
+	 */
+	bool (*get_hw_state)(struct intel_dvo_device *dev);
+
 	/**
 	 * Query the device for the modes it provides.
 	 *
diff --git a/drivers/gpu/drm/i915/dvo_ch7017.c b/drivers/gpu/drm/i915/dvo_ch7017.c
index 71e7650..86b27d1 100644
--- a/drivers/gpu/drm/i915/dvo_ch7017.c
+++ b/drivers/gpu/drm/i915/dvo_ch7017.c
@@ -359,6 +359,18 @@ static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable)
 	msleep(20);
 }
 
+static bool ch7017_get_hw_state(struct intel_dvo_device *dvo)
+{
+	uint8_t val;
+
+	ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
+
+	if (val & CH7017_LVDS_POWER_DOWN_EN)
+		return false;
+	else
+		return true;
+}
+
 static void ch7017_dump_regs(struct intel_dvo_device *dvo)
 {
 	uint8_t val;
@@ -396,6 +408,7 @@ struct intel_dvo_dev_ops ch7017_ops = {
 	.mode_valid = ch7017_mode_valid,
 	.mode_set = ch7017_mode_set,
 	.dpms = ch7017_dpms,
+	.get_hw_state = ch7017_get_hw_state,
 	.dump_regs = ch7017_dump_regs,
 	.destroy = ch7017_destroy,
 };
diff --git a/drivers/gpu/drm/i915/dvo_ch7xxx.c b/drivers/gpu/drm/i915/dvo_ch7xxx.c
index c1dea5b..38f3a6c 100644
--- a/drivers/gpu/drm/i915/dvo_ch7xxx.c
+++ b/drivers/gpu/drm/i915/dvo_ch7xxx.c
@@ -297,6 +297,18 @@ static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
 		ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
 }
 
+static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
+{
+	u8 val;
+
+	ch7xxx_readb(dvo, CH7xxx_PM, &val);
+
+	if (val & CH7xxx_PM_FPD)
+		return false;
+	else
+		return true;
+}
+
 static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
 {
 	int i;
@@ -326,6 +338,7 @@ struct intel_dvo_dev_ops ch7xxx_ops = {
 	.mode_valid = ch7xxx_mode_valid,
 	.mode_set = ch7xxx_mode_set,
 	.dpms = ch7xxx_dpms,
+	.get_hw_state = ch7xxx_get_hw_state,
 	.dump_regs = ch7xxx_dump_regs,
 	.destroy = ch7xxx_destroy,
 };
diff --git a/drivers/gpu/drm/i915/dvo_ivch.c b/drivers/gpu/drm/i915/dvo_ivch.c
index fa8ff6b..baaf65b 100644
--- a/drivers/gpu/drm/i915/dvo_ivch.c
+++ b/drivers/gpu/drm/i915/dvo_ivch.c
@@ -323,6 +323,20 @@ static void ivch_dpms(struct intel_dvo_device *dvo, bool enable)
 	udelay(16 * 1000);
 }
 
+static bool ivch_get_hw_state(struct intel_dvo_device *dvo)
+{
+	uint16_t vr01;
+
+	/* Set the new power state of the panel. */
+	if (!ivch_read(dvo, VR01, &vr01))
+		return false;
+
+	if (vr01 & VR01_LCD_ENABLE)
+		return true;
+	else
+		return false;
+}
+
 static void ivch_mode_set(struct intel_dvo_device *dvo,
 			  struct drm_display_mode *mode,
 			  struct drm_display_mode *adjusted_mode)
@@ -413,6 +427,7 @@ static void ivch_destroy(struct intel_dvo_device *dvo)
 struct intel_dvo_dev_ops ivch_ops = {
 	.init = ivch_init,
 	.dpms = ivch_dpms,
+	.get_hw_state = ivch_get_hw_state,
 	.mode_valid = ivch_mode_valid,
 	.mode_set = ivch_mode_set,
 	.detect = ivch_detect,
diff --git a/drivers/gpu/drm/i915/dvo_sil164.c b/drivers/gpu/drm/i915/dvo_sil164.c
index cc24c1c..4debd32 100644
--- a/drivers/gpu/drm/i915/dvo_sil164.c
+++ b/drivers/gpu/drm/i915/dvo_sil164.c
@@ -226,6 +226,21 @@ static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
 	return;
 }
 
+static bool sil164_get_hw_state(struct intel_dvo_device *dvo)
+{
+	int ret;
+	unsigned char ch;
+
+	ret = sil164_readb(dvo, SIL164_REG8, &ch);
+	if (ret == false)
+		return false;
+
+	if (ch & SIL164_8_PD)
+		return true;
+	else
+		return false;
+}
+
 static void sil164_dump_regs(struct intel_dvo_device *dvo)
 {
 	uint8_t val;
@@ -258,6 +273,7 @@ struct intel_dvo_dev_ops sil164_ops = {
 	.mode_valid = sil164_mode_valid,
 	.mode_set = sil164_mode_set,
 	.dpms = sil164_dpms,
+	.get_hw_state = sil164_get_hw_state,
 	.dump_regs = sil164_dump_regs,
 	.destroy = sil164_destroy,
 };
diff --git a/drivers/gpu/drm/i915/dvo_tfp410.c b/drivers/gpu/drm/i915/dvo_tfp410.c
index 097b3e8..e17f1b0 100644
--- a/drivers/gpu/drm/i915/dvo_tfp410.c
+++ b/drivers/gpu/drm/i915/dvo_tfp410.c
@@ -249,6 +249,19 @@ static void tfp410_dpms(struct intel_dvo_device *dvo, bool enable)
 	tfp410_writeb(dvo, TFP410_CTL_1, ctl1);
 }
 
+static bool tfp410_get_hw_state(struct intel_dvo_device *dvo)
+{
+	uint8_t ctl1;
+
+	if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))
+		return false;
+
+	if (ctl1 & TFP410_CTL_1_PD)
+		return true;
+	else
+		return false;
+}
+
 static void tfp410_dump_regs(struct intel_dvo_device *dvo)
 {
 	uint8_t val, val2;
@@ -299,6 +312,7 @@ struct intel_dvo_dev_ops tfp410_ops = {
 	.mode_valid = tfp410_mode_valid,
 	.mode_set = tfp410_mode_set,
 	.dpms = tfp410_dpms,
+	.get_hw_state = tfp410_get_hw_state,
 	.dump_regs = tfp410_dump_regs,
 	.destroy = tfp410_destroy,
 };
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 34cbe8c..88dd005 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -97,6 +97,31 @@ static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
 			    struct intel_dvo, base);
 }
 
+static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
+{
+	struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
+
+	return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
+}
+
+static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
+				   enum pipe *pipe)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
+	u32 tmp;
+
+	tmp = I915_READ(intel_dvo->dev.dvo_reg);
+
+	if (!(tmp & DVO_ENABLE))
+		return false;
+
+	*pipe = PORT_TO_PIPE(tmp);
+
+	return true;
+}
+
 static void intel_disable_dvo(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -406,6 +431,8 @@ void intel_dvo_init(struct drm_device *dev)
 
 	intel_encoder->disable = intel_disable_dvo;
 	intel_encoder->enable = intel_enable_dvo;
+	intel_encoder->get_hw_state = intel_dvo_get_hw_state;
+	intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
 
 	/* Now, try to find a controller */
 	for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
-- 
1.7.7.6

[PATCH 42/43] drm/i915: read out the modeset hw state at load and resume time

[Daniel Vetter]

... instead of resetting a few things and hoping that this will work
out.

To properly disable the output pipelines at the initial modeset after
resume or boot up we need to have an accurate picture of which outputs
are enabled and connected to which crtcs. Otherwise we risk disabling
things at the wrong time, which can lead to hangs (or at least royally
confused panels), both requiring a walk to the reset button to fix.

Hence read out the hw state with the freshly introduce get_hw_state
functions and then sanitize it afterwards.

For a full modeset readout (which would allow us to avoid the initial
modeset at boot up) a few things are still missing:
- Reading out the mode from the pipe, especially the dotclock
  computation is quite some fun.
- Reading out the parameters for the stolen memory framebuffer and
  wrapping it up.
- Reading out the pch pll connections - luckily the disable code
  simply bails out if the crtc doesn't have a pch pll attached (even
  for configurations that would need one).

This patch here turned up tons of smelly stuff around resume: We
restore tons of register in seemingly random way (well, not quite, but
we're not too careful either), which leaves the hw in a rather
ill-defined state: E.g. the port registers are sometimes
unconditionally restore (lvds, crt), leaving us with an active
encoder/connector but no active pipe connected to it. Luckily the hw
state sanitizer detects this madness and fixes things up a bit.

v2: When checking whether an encoder with active connectors has a crtc
wire up to it, check for both the crtc _and_ it's active state.

v3:
- Extract intel_sanitize_encoder.
- Manually disable active encoders without an active pipe.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.c      |    1 +
 drivers/gpu/drm/i915/i915_drv.h      |    1 +
 drivers/gpu/drm/i915/intel_display.c |  276 ++++++++++++++++++++++++++--------
 3 files changed, 212 insertions(+), 66 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 57381eb..5f26aea 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -650,6 +650,7 @@ static int i915_drm_thaw(struct drm_device *dev)
 		mutex_unlock(&dev->struct_mutex);
 
 		intel_modeset_init_hw(dev);
+		intel_modeset_setup_hw_state(dev);
 		drm_mode_config_reset(dev);
 		drm_irq_install(dev);
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 111d1e5..0ee0e0a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1511,6 +1511,7 @@ extern void intel_modeset_init(struct drm_device *dev);
 extern void intel_modeset_gem_init(struct drm_device *dev);
 extern void intel_modeset_cleanup(struct drm_device *dev);
 extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
+extern void intel_modeset_setup_hw_state(struct drm_device *dev);
 extern bool intel_fbc_enabled(struct drm_device *dev);
 extern void intel_disable_fbc(struct drm_device *dev);
 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d423b9a..a8791f8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3546,7 +3546,7 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
  * of the connector. */
 bool intel_connector_get_hw_state(struct intel_connector *connector)
 {
-	enum pipe pipe;
+	enum pipe pipe = 0;
 	struct intel_encoder *encoder = connector->encoder;
 
 	return encoder->get_hw_state(encoder, &pipe);
@@ -6495,65 +6495,6 @@ free_work:
 	return ret;
 }
 
-static void intel_sanitize_modesetting(struct drm_device *dev,
-				       int pipe, int plane)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 reg, val;
-	int i;
-
-	/* Clear any frame start delays used for debugging left by the BIOS */
-	for_each_pipe(i) {
-		reg = PIPECONF(i);
-		I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
-	}
-
-	if (HAS_PCH_SPLIT(dev))
-		return;
-
-	/* Who knows what state these registers were left in by the BIOS or
-	 * grub?
-	 *
-	 * If we leave the registers in a conflicting state (e.g. with the
-	 * display plane reading from the other pipe than the one we intend
-	 * to use) then when we attempt to teardown the active mode, we will
-	 * not disable the pipes and planes in the correct order -- leaving
-	 * a plane reading from a disabled pipe and possibly leading to
-	 * undefined behaviour.
-	 */
-
-	reg = DSPCNTR(plane);
-	val = I915_READ(reg);
-
-	if ((val & DISPLAY_PLANE_ENABLE) == 0)
-		return;
-	if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
-		return;
-
-	/* This display plane is active and attached to the other CPU pipe. */
-	pipe = !pipe;
-
-	/* Disable the plane and wait for it to stop reading from the pipe. */
-	intel_disable_plane(dev_priv, plane, pipe);
-	intel_disable_pipe(dev_priv, pipe);
-}
-
-static void intel_crtc_reset(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-
-	/* Reset flags back to the 'unknown' status so that they
-	 * will be correctly set on the initial modeset.
-	 */
-	intel_crtc->dpms_mode = -1;
-
-	/* We need to fix up any BIOS configuration that conflicts with
-	 * our expectations.
-	 */
-	intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
-}
-
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
 	.mode_set_base_atomic = intel_pipe_set_base_atomic,
 	.load_lut = intel_crtc_load_lut,
@@ -6970,7 +6911,6 @@ fail:
 }
 
 static const struct drm_crtc_funcs intel_crtc_funcs = {
-	.reset = intel_crtc_reset,
 	.cursor_set = intel_crtc_cursor_set,
 	.cursor_move = intel_crtc_cursor_move,
 	.gamma_set = intel_crtc_gamma_set,
@@ -7028,8 +6968,6 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
 	dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
 
-	intel_crtc_reset(&intel_crtc->base);
-	intel_crtc->active = true; /* force the pipe off on setup_init_config */
 	intel_crtc->bpp = 24; /* default for pre-Ironlake */
 
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
@@ -7242,9 +7180,6 @@ static void intel_setup_outputs(struct drm_device *dev)
 			intel_encoder_clones(encoder);
 	}
 
-	/* disable all the possible outputs/crtcs before entering KMS mode */
-	drm_helper_disable_unused_functions(dev);
-
 	if (HAS_PCH_SPLIT(dev))
 		ironlake_init_pch_refclk(dev);
 }
@@ -7622,11 +7557,220 @@ void intel_modeset_init(struct drm_device *dev)
 		    (unsigned long)dev);
 }
 
+static void
+intel_connector_break_all_links(struct intel_connector *connector)
+{
+	connector->base.dpms = DRM_MODE_DPMS_OFF;
+	connector->base.encoder = NULL;
+	connector->encoder->connectors_active = false;
+	connector->encoder->base.crtc = NULL;
+}
+
+static void intel_sanitize_crtc(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 reg, val;
+
+	/* Clear the dpms state for compatibility with code still using that
+	 * deprecated state variable. */
+	crtc->dpms_mode = -1;
+
+	/* Clear any frame start delays used for debugging left by the BIOS */
+	reg = PIPECONF(crtc->pipe);
+	I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
+
+	/* We need to sanitize the plane -> pipe mapping first because this will
+	 * disable the crtc (and hence change the state) if it is wrong. */
+	if (!HAS_PCH_SPLIT(dev)) {
+		struct intel_connector *connector;
+
+		reg = DSPCNTR(crtc->plane);
+		val = I915_READ(reg);
+
+		if ((val & DISPLAY_PLANE_ENABLE) == 0 &&
+		    (!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
+			goto ok;
+
+		DRM_DEBUG_KMS("[CRTC:%d] wrong plane connection detected!\n",
+			      crtc->base.base.id);
+
+		/* Pipe has the wrong plane attached and the plane is active.
+		 * Temporarily change the plane mapping and disable everything
+		 * ...  */
+		crtc->plane = !crtc->pipe;
+		dev_priv->display.crtc_disable(&crtc->base);
+		crtc->plane = crtc->pipe;
+
+		/* ... and break all links. */
+		list_for_each_entry(connector, &dev->mode_config.connector_list,
+				    base.head) {
+			if (connector->encoder->base.crtc != &crtc->base)
+				continue;
+
+			intel_connector_break_all_links(connector);
+		}
+
+		WARN_ON(crtc->active);
+		crtc->base.enabled = false;
+	}
+ok:
+
+	/* Adjust the state of the output pipe according to whether we
+	 * have active connectors/encoders. */
+	intel_crtc_update_dpms(&crtc->base);
+
+	if (crtc->active != crtc->base.enabled) {
+		struct intel_encoder *encoder;
+
+		/* This can happen either due to bugs in the get_hw_state
+		 * functions or because the pipe is force-enabled due to the
+		 * pipe A quirk. */
+		DRM_DEBUG_KMS("[CRTC:%d] hw state adjusted, was %s, now %s\n",
+			      crtc->base.base.id,
+			      crtc->base.enabled ? "enabled" : "disabled",
+			      crtc->active ? "enabled" : "disabled");
+
+		crtc->base.enabled = crtc->active;
+
+		/* Because we only establish the connector -> encoder ->
+		 * crtc links if something is active, this means the
+		 * crtc is now deactivated. Break the links. connector
+		 * -> encoder links are only establish when things are
+		 *  actually up, hence no need to break them. */
+		WARN_ON(crtc->active);
+
+		for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
+			WARN_ON(encoder->connectors_active);
+			encoder->base.crtc = NULL;
+		}
+	}
+}
+
+static void intel_sanitize_encoder(struct intel_encoder *encoder)
+{
+	struct intel_connector *connector;
+	struct drm_device *dev = encoder->base.dev;
+
+	/* We need to check both for a crtc link (meaning that the
+	 * encoder is active and trying to read from a pipe) and the
+	 * pipe itself being active. */
+	bool has_active_crtc = encoder->base.crtc &&
+		to_intel_crtc(encoder->base.crtc)->active;
+
+	if (encoder->connectors_active && !has_active_crtc) {
+		DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
+			      encoder->base.base.id,
+			      drm_get_encoder_name(&encoder->base));
+
+		/* Connector is active, but has no active pipe. This is
+		 * fallout from our resume register restoring. Disable
+		 * the encoder manually again. */
+		if (encoder->base.crtc) {
+			DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
+				      encoder->base.base.id,
+				      drm_get_encoder_name(&encoder->base));
+			encoder->disable(encoder);
+		}
+
+		/* Inconsisten output/port/pipe state happens presumably due to
+		 * a bug in one of the get_hw_state functions. Or someplace else
+		 * in our code, like the register restore mess on resume. Clamp
+		 * things to off as a safer default. */
+		list_for_each_entry(connector,
+				    &dev->mode_config.connector_list,
+				    base.head) {
+			if (connector->encoder != encoder)
+				continue;
+
+			intel_connector_break_all_links(connector);
+		}
+	}
+	/* Enabled encoders without active connectors will be fixed in
+	 * the crtc fixup. */
+}
+
+/* Scan out the current hw modeset state, sanitizes it and maps it into the drm
+ * and i915 state tracking structures. */
+void intel_modeset_setup_hw_state(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	enum pipe pipe;
+	u32 tmp;
+	struct intel_crtc *crtc;
+	struct intel_encoder *encoder;
+	struct intel_connector *connector;
+
+	for_each_pipe(pipe) {
+		crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
+
+		tmp = I915_READ(PIPECONF(pipe));
+		if (tmp & PIPECONF_ENABLE)
+			crtc->active = true;
+		else
+			crtc->active = false;
+
+		crtc->base.enabled = crtc->active;
+
+		DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
+			      crtc->base.base.id,
+			      crtc->active ? "enabled" : "disabled");
+	}
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list,
+			    base.head) {
+		pipe = 0;
+
+		if (encoder->get_hw_state(encoder, &pipe)) {
+			encoder->base.crtc =
+				dev_priv->pipe_to_crtc_mapping[pipe];
+		} else {
+			encoder->base.crtc = NULL;
+		}
+
+		encoder->connectors_active = false;
+		DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe=%i\n",
+			      encoder->base.base.id,
+			      drm_get_encoder_name(&encoder->base),
+			      encoder->base.crtc ? "enabled" : "disabled",
+			      pipe);
+	}
+
+	list_for_each_entry(connector, &dev->mode_config.connector_list,
+			    base.head) {
+		if (connector->get_hw_state(connector)) {
+			connector->base.dpms = DRM_MODE_DPMS_ON;
+			connector->encoder->connectors_active = true;
+			connector->base.encoder = &connector->encoder->base;
+		} else {
+			connector->base.dpms = DRM_MODE_DPMS_OFF;
+			connector->base.encoder = NULL;
+		}
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
+			      connector->base.base.id,
+			      drm_get_connector_name(&connector->base),
+			      connector->base.encoder ? "enabled" : "disabled");
+	}
+
+	/* HW state is read out, now we need to sanitize this mess. */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list,
+			    base.head) {
+		intel_sanitize_encoder(encoder);
+	}
+
+	for_each_pipe(pipe) {
+		crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
+		intel_sanitize_crtc(crtc);
+	}
+}
+
 void intel_modeset_gem_init(struct drm_device *dev)
 {
 	intel_modeset_init_hw(dev);
 
 	intel_setup_overlay(dev);
+
+	intel_modeset_setup_hw_state(dev);
 }
 
 void intel_modeset_cleanup(struct drm_device *dev)
-- 
1.7.7.6

[PATCH 43/43] drm/i915: check connector hw/sw state

[Daniel Vetter]

Atm we can only check the connector state after a dpms call - while doing
modeset with the copy&pasted crtc helper code things are too ill-defined
for proper checking. But the idea is very much to call this check
from the modeset code, too.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_crt.c     |    2 +
 drivers/gpu/drm/i915/intel_display.c |   36 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_dp.c      |    2 +
 drivers/gpu/drm/i915/intel_drv.h     |    1 +
 drivers/gpu/drm/i915/intel_dvo.c     |    2 +
 drivers/gpu/drm/i915/intel_sdvo.c    |    2 +
 6 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 0a5b61a..14a2f24 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -176,6 +176,8 @@ static void intel_crt_dpms(struct drm_connector *connector, int mode)
 
 		intel_crtc_update_dpms(crtc);
 	}
+
+	intel_connector_check_state(to_intel_connector(connector));
 }
 
 static int intel_crt_mode_valid(struct drm_connector *connector,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a8791f8..14abbb8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3519,6 +3519,40 @@ void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
 	}
 }
 
+/* Cross check the actual hw state with our own modeset state tracking (and it's
+ * internal consistency). */
+void intel_connector_check_state(struct intel_connector *connector)
+{
+	if (connector->get_hw_state(connector)) {
+		struct intel_encoder *encoder = connector->encoder;
+		struct drm_crtc *crtc;
+		bool encoder_enabled;
+		enum pipe pipe;
+
+		WARN(connector->base.dpms != DRM_MODE_DPMS_ON,
+		     "wrong connector dpms state\n");
+		WARN(connector->base.encoder != &encoder->base,
+		     "active connector not linked to encoder\n");
+		WARN(!encoder->connectors_active,
+		     "encoder->connectors_active not set\n");
+
+		encoder_enabled = encoder->get_hw_state(encoder, &pipe);
+		WARN(!encoder_enabled, "encoder not enabled\n");
+		if (WARN_ON(!encoder->base.crtc))
+			return;
+
+		crtc = encoder->base.crtc;
+
+		WARN(!crtc->enabled, "crtc not enabled\n");
+		WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
+	} else {
+		/* We still allow dpms changes on unused connectors, hence no
+		 * check for dpms here. */
+		WARN_ON(!connector->base.encoder);
+	}
+
+}
+
 /* Even simpler default implementation, if there's really no special case to
  * consider. */
 void intel_connector_dpms(struct drm_connector *connector, int mode)
@@ -3539,6 +3573,8 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
 		intel_encoder_dpms(encoder, mode);
 	else
 		encoder->connectors_active = false;
+
+	intel_connector_check_state(to_intel_connector(connector));
 }
 
 /* Simple connector->get_hw_state implementation for encoders that support only
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 648c6e5..61356b7 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1394,6 +1394,8 @@ intel_dp_dpms(struct drm_connector *connector, int mode)
 		intel_encoder_dpms(&intel_dp->base, mode);
 		WARN_ON(intel_dp->dpms_mode != DRM_MODE_DPMS_ON);
 	}
+
+	intel_connector_check_state(to_intel_connector(connector));
 }
 
 /*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index aad231e..2be4515 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -399,6 +399,7 @@ extern void intel_encoder_destroy(struct drm_encoder *encoder);
 extern void intel_encoder_dpms(struct intel_encoder *encoder, int mode);
 extern void intel_connector_dpms(struct drm_connector *, int mode);
 extern bool intel_connector_get_hw_state(struct intel_connector *connector);
+extern void intel_connector_check_state(struct intel_connector *);
 
 static inline struct intel_encoder *intel_attached_encoder(struct drm_connector *connector)
 {
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 88dd005..b9df54c 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -180,6 +180,8 @@ static void intel_dvo_dpms(struct drm_connector *connector, int mode)
 
 		intel_crtc_update_dpms(crtc);
 	}
+
+	intel_connector_check_state(to_intel_connector(connector));
 }
 
 static int intel_dvo_mode_valid(struct drm_connector *connector,
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 65b52a1..d624355 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1271,6 +1271,8 @@ static void intel_sdvo_dpms(struct drm_connector *connector, int mode)
 			intel_sdvo_set_encoder_power_state(intel_sdvo, mode);
 		intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
 	}
+
+	intel_connector_check_state(to_intel_connector(connector));
 }
 
 static int intel_sdvo_mode_valid(struct drm_connector *connector,
-- 
1.7.7.6

Re: [PATCH 01/43] drm/i915: introduce for_each_encoder_on_crtc

[Paulo Zanoni]

2012/7/3 Daniel Vetter <daniel.vetter@ffwll.ch>:
> We already have this pattern at quite a few places, and moving part of
> the modeset helper stuff into the driver will add more.
>
> v2: Don't clobber the crtc struct name with the macro parameter ...
>
> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Looks like you're missing some places: intel_lvds_mode_fixup() and
intel_tv_mode_fixup().

http://paste.debian.net/177750/ (patch only compiled, not tested)
(changes are trivial, so if pastebin expires it, you still know what
to do)

With that:

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

-- 
Paulo Zanoni

[PATCH] drm/i915: introduce for_each_encoder_on_crtc

[Daniel Vetter]

We already have this pattern at quite a few places, and moving part of
the modeset helper stuff into the driver will add more.

v2: Don't clobber the crtc struct name with the macro parameter ...

v3: Convert two more places noticed by Paulo Zanoni.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.h      |    4 +++
 drivers/gpu/drm/i915/intel_display.c |   38 ++++++++-------------------------
 drivers/gpu/drm/i915/intel_dp.c      |   22 +++++--------------
 drivers/gpu/drm/i915/intel_lvds.c    |    6 ++--
 drivers/gpu/drm/i915/intel_tv.c      |   10 ++------
 5 files changed, 25 insertions(+), 55 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a0c15ab..aa24fc1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -79,6 +79,10 @@ enum port {
 
 #define for_each_pipe(p) for ((p) = 0; (p) < dev_priv->num_pipe; (p)++)
 
+#define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
+	list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
+		if ((intel_encoder)->base.crtc == (__crtc))
+
 struct intel_pch_pll {
 	int refcount; /* count of number of CRTCs sharing this PLL */
 	int active; /* count of number of active CRTCs (i.e. DPMS on) */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3fbc802..72b73f8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -627,11 +627,10 @@ static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock
 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
-		if (encoder->base.crtc == crtc && encoder->type == type)
+	for_each_encoder_on_crtc(dev, crtc, encoder)
+		if (encoder->type == type)
 			return true;
 
 	return false;
@@ -2805,16 +2804,13 @@ static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
 static bool intel_crtc_driving_pch(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 
 	/*
 	 * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
 	 * must be driven by its own crtc; no sharing is possible.
 	 */
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 
 		/* On Haswell, LPT PCH handles the VGA connection via FDI, and Haswell
 		 * CPU handles all others */
@@ -3703,16 +3699,12 @@ static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct drm_encoder *encoder;
 	struct drm_connector *connector;
+	struct intel_encoder *intel_encoder;
 	unsigned int display_bpc = UINT_MAX, bpc;
 
 	/* Walk the encoders & connectors on this crtc, get min bpc */
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
-
-		if (encoder->crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
 
 		if (intel_encoder->type == INTEL_OUTPUT_LVDS) {
 			unsigned int lvds_bpc;
@@ -3744,7 +3736,7 @@ static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
 		/* Not one of the known troublemakers, check the EDID */
 		list_for_each_entry(connector, &dev->mode_config.connector_list,
 				    head) {
-			if (connector->encoder != encoder)
+			if (connector->encoder != &intel_encoder->base)
 				continue;
 
 			/* Don't use an invalid EDID bpc value */
@@ -4213,15 +4205,11 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 	u32 dspcntr, pipeconf, vsyncshift;
 	bool ok, has_reduced_clock = false, is_sdvo = false;
 	bool is_lvds = false, is_tv = false, is_dp = false;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder;
 	const intel_limit_t *limit;
 	int ret;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
@@ -4524,15 +4512,11 @@ static int ironlake_get_refclk(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_encoder *encoder;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *edp_encoder = NULL;
 	int num_connectors = 0;
 	bool is_lvds = false;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
@@ -4569,7 +4553,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 	u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
 	bool ok, has_reduced_clock = false, is_sdvo = false;
 	bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
-	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct intel_encoder *encoder, *edp_encoder = NULL;
 	const intel_limit_t *limit;
 	int ret;
@@ -4580,10 +4563,7 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 	bool dither;
 	bool is_cpu_edp = false, is_pch_edp = false;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
-		if (encoder->base.crtc != crtc)
-			continue;
-
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_LVDS:
 			is_lvds = true;
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 76a7080..096947d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -793,8 +793,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		 struct drm_display_mode *adjusted_mode)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_encoder *encoder;
+	struct intel_encoder *encoder;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int lane_count = 4;
@@ -804,13 +803,9 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 	/*
 	 * Find the lane count in the intel_encoder private
 	 */
-	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		struct intel_dp *intel_dp;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
-		if (encoder->crtc != crtc)
-			continue;
-
-		intel_dp = enc_to_intel_dp(encoder);
 		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
 		    intel_dp->base.type == INTEL_OUTPUT_EDP)
 		{
@@ -2404,16 +2399,11 @@ int
 intel_trans_dp_port_sel(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_encoder *encoder;
+	struct intel_encoder *encoder;
 
-	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		struct intel_dp *intel_dp;
-
-		if (encoder->crtc != crtc)
-			continue;
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
-		intel_dp = enc_to_intel_dp(encoder);
 		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
 		    intel_dp->base.type == INTEL_OUTPUT_EDP)
 			return intel_dp->output_reg;
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 05fcadb..9b706a5 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -236,7 +236,7 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
-	struct drm_encoder *tmp_encoder;
+	struct intel_encoder *tmp_encoder;
 	u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
 	int pipe;
 
@@ -247,8 +247,8 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
 	}
 
 	/* Should never happen!! */
-	list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
-		if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
+	for_each_encoder_on_crtc(dev, encoder->crtc, tmp_encoder) {
+		if (&tmp_encoder->base != encoder) {
 			DRM_ERROR("Can't enable LVDS and another "
 			       "encoder on the same pipe\n");
 			return false;
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index a233a51..3b413c9 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -895,20 +895,16 @@ intel_tv_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		    struct drm_display_mode *adjusted_mode)
 {
 	struct drm_device *dev = encoder->dev;
-	struct drm_mode_config *drm_config = &dev->mode_config;
 	struct intel_tv *intel_tv = enc_to_intel_tv(encoder);
 	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
-	struct drm_encoder *other_encoder;
+	struct intel_encoder *other_encoder;
 
 	if (!tv_mode)
 		return false;
 
-	/* FIXME: lock encoder list */
-	list_for_each_entry(other_encoder, &drm_config->encoder_list, head) {
-		if (other_encoder != encoder &&
-		    other_encoder->crtc == encoder->crtc)
+	for_each_encoder_on_crtc(dev, encoder->crtc, other_encoder)
+		if (&other_encoder->base != encoder)
 			return false;
-	}
 
 	adjusted_mode->clock = tv_mode->clock;
 	return true;
-- 
1.7.7.6

Re: [PATCH] drm/i915: introduce for_each_encoder_on_crtc

[Daniel Vetter]

On Thu, Jul 05, 2012 at 09:50:24AM +0200, Daniel Vetter wrote:
> We already have this pattern at quite a few places, and moving part of
> the modeset helper stuff into the driver will add more.
> 
> v2: Don't clobber the crtc struct name with the macro parameter ...
> 
> v3: Convert two more places noticed by Paulo Zanoni.
> 
> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

Ok, I've picked this one up for -next, thanks for the review.
-Daniel
-- 
Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48

Re: [PATCH 29/43] drm/i915: copy&paste drm_crtc_helper_set_mode

[Paulo Zanoni]

2012/7/3 Daniel Vetter <daniel.vetter@ffwll.ch>:
> Together with the static helpers drm_crtc_prepare_encoders and
> drm_encoder_disable (which will be simplified in the next patch, but
> for now are 1:1 copies). Again, no changes beside new names for these
> functions.
>
> Also call our new set_mode instead of the crtc helper one now in all
> the places we've done so far.
>
> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Writing also on email since this was requested on IRC.

We now have intel_crtc_set_mode and intel_crtc_mode_set. One calls the
other. Now this happens by using pointers, but later in the patch
series, intel_crtc_set_mode will directly call intel_crtc_mode_set.
Creative function names are always welcome :)

-- 
Paulo Zanoni

Re: [PATCH 08/43] drm/i915/hdmi: convert to encoder->disable/enable

[Paulo Zanoni]

Hi

2012/7/3 Daniel Vetter <daniel.vetter@ffwll.ch>:
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index f33fe1a..b71303c 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -752,3 +747,18 @@ void intel_ddi_dpms(struct drm_encoder *encoder, int mode)
>         I915_WRITE(DDI_BUF_CTL(port),
>                         temp);
>  }
> +
> +void intel_disable_ddi(struct intel_encoder *encoder)
> +{
> +       struct drm_device *dev = encoder->base.dev;
> +       struct drm_i915_private *dev_priv = dev->dev_private;
> +       struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
> +       int port = intel_hdmi->ddi_port;
> +       u32 temp;
> +
> +       temp = I915_READ(DDI_BUF_CTL(port));
> +       temp &= ~DDI_BUF_CTL_ENABLE;
> +
> +       I915_WRITE(DDI_BUF_CTL(port),
> +                       temp);

<bikeshed>
Since you're creating 2 "new functions" you might want to move temp to
the upper line in both intel_disable_did and intel_enable_ddi.

Every time I look at this I think about fixing it. And now there are
two. Maybe it's just my obsessive compulsive disorder... :)
</bikeshed>

-- 
Paulo Zanoni