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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Subject: [PATCH 30/76] drm/i915: Add interfaces to read out encoder/connector hw state
Date: Thu, 26 Jul 2012 20:48:55 +0200
Message-ID: <1343328581-2324-31-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1343328581-2324-1-git-send-email-daniel.vetter@ffwll.ch>

It is all glorious if we try really hard to only enable/disable 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 - we don't know what outputs/ports are
enabled and hence have to disable everything in a rather ad-hoc way.

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 where we have a 1:1 encoder to connector mapping.

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(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 428e0ed..c741062 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3583,6 +3583,17 @@ 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,
 				  const 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 0f2a42e..a2acf5f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -143,12 +143,19 @@ 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 {
@@ -426,6 +433,7 @@ 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)
 {
-- 
1.7.10.4

  parent reply index

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-26 18:48 [PATCH 00/76] modeset rework, lightly reworked Daniel Vetter
2012-07-26 18:48 ` [PATCH 01/76] drm/fb-helper: don't clobber output routing in setup_crtcs Daniel Vetter
2012-08-29 16:57   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 02/76] drm/i915: add missing gen2 pipe A quirk entries Daniel Vetter
2012-08-29 16:58   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 03/76] drm/i915/ns2501: kill pll A enabling hack Daniel Vetter
2012-08-29 16:59   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 04/76] drm/i915: rip out the overlay pipe A workaround Daniel Vetter
2012-08-29 16:59   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 05/76] drm/i915: prepare load-detect pipe code for dpms changes Daniel Vetter
2012-08-29 17:07   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 06/76] drm/i915: simplify dvo dpms interface Daniel Vetter
2012-08-29 17:09   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 07/76] drm/i915: kill a few unused things in dev_priv Daniel Vetter
2012-08-29 17:37   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 08/76] drm/i915: extract ironlake_fdi_pll_disable Daniel Vetter
2012-08-29 17:47   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 09/76] drm/i915: add crtc->enable/disable vfuncs insted of dpms Daniel Vetter
2012-08-29 17:49   ` Jesse Barnes
2012-07-26 18:48 ` [PATCH 10/76] drm/i915: rip out crtc prepare/commit indirection Daniel Vetter
2012-07-26 18:48 ` [PATCH 11/76] drm/i915: add direct encoder disable/enable infrastructure Daniel Vetter
2012-07-26 18:48 ` [PATCH 12/76] drm/i915/hdmi: convert to encoder->disable/enable Daniel Vetter
2012-07-26 18:48 ` [PATCH 13/76] drm/i915/tv: convert to encoder enable/disable Daniel Vetter
2012-07-26 18:48 ` [PATCH 14/76] drm/i915/lvds: convert to encoder disable/enable Daniel Vetter
2012-07-26 18:48 ` [PATCH 15/76] drm/i915/dp: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 16/76] drm/i915/crt: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 17/76] drm/i915/sdvo: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 18/76] drm/i915/dvo: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 19/76] drm/i915: convert dpms functions of dvo/sdvo/crt Daniel Vetter
2012-07-26 18:48 ` [PATCH 20/76] drm/i915: rip out encoder->disable/enable checks Daniel Vetter
2012-07-26 18:48 ` [PATCH 21/76] drm/i915: clean up encoder_prepare/commit Daniel Vetter
2012-07-26 18:48 ` [PATCH 22/76] drm/i915: copy&paste drm_crtc_helper_set_config Daniel Vetter
2012-07-26 18:48 ` [PATCH 23/76] drm/i915: call set_base directly Daniel Vetter
2012-07-26 18:48 ` [PATCH 24/76] drm/i915: inline intel_best_encoder Daniel Vetter
2012-07-26 18:48 ` [PATCH 25/76] drm/i915: copy&paste drm_crtc_helper_set_mode Daniel Vetter
2012-07-26 18:48 ` [PATCH 26/76] drm/i915: simplify intel_crtc_prepare_encoders Daniel Vetter
2012-07-26 18:48 ` [PATCH 27/76] drm/i915: rip out encoder->prepare/commit Daniel Vetter
2012-07-26 18:48 ` [PATCH 28/76] drm/i915: call crtc functions directly Daniel Vetter
2012-07-26 18:48 ` [PATCH 29/76] drm/i915: WARN when trying to enabled an unused crtc Daniel Vetter
2012-07-26 18:48 ` Daniel Vetter [this message]
2012-07-26 18:48 ` [PATCH 31/76] drm/i915/dp: implement get_hw_state Daniel Vetter
2012-07-26 18:48 ` [PATCH 32/76] drm/i915/hdmi: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 33/76] drm/i915/tv: " Daniel Vetter
2012-07-26 18:48 ` [PATCH 34/76] drm/i915/lvds: " Daniel Vetter
2012-07-26 18:49 ` [PATCH 35/76] drm/i915/crt: " Daniel Vetter
2012-07-26 18:49 ` [PATCH 36/76] drm/i915/sdvo: " Daniel Vetter
2012-07-26 18:49 ` [PATCH 37/76] drm/i915/dvo: " Daniel Vetter
2012-07-26 18:49 ` [PATCH 38/76] drm/i915: read out the modeset hw state at load and resume time Daniel Vetter
2012-07-26 18:49 ` [PATCH 39/76] drm/i915: check connector hw/sw state Daniel Vetter
2012-07-26 18:49 ` [PATCH 40/76] drm/i915: rip out intel_crtc->dpms_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 41/76] drm/i915: rip out intel_dp->dpms_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 42/76] drm/i915: ensure the force pipe A quirk is actually followed Daniel Vetter
2012-07-26 18:49 ` [PATCH 43/76] drm/i915: introduce struct intel_set_config Daniel Vetter
2012-07-26 18:49 ` [PATCH 44/76] drm/i915: extract modeset config save/restore code Daniel Vetter
2012-07-26 18:49 ` [PATCH 45/76] drm/i915: extract intel_set_config_compute_mode_changes Daniel Vetter
2012-07-26 18:49 ` [PATCH 46/76] drm/i915: extract intel_set_config_update_output_state Daniel Vetter
2012-07-26 18:49 ` [PATCH 47/76] drm/i915: implement crtc helper semantics relied upon by the fb helper Daniel Vetter
2012-07-26 18:49 ` [PATCH 48/76] drm/i915: don't update the fb base if there is no fb Daniel Vetter
2012-07-26 18:49 ` [PATCH 49/76] drm/i915: convert pointless error checks in set_config to BUGs Daniel Vetter
2012-07-26 18:49 ` [PATCH 50/76] drm/i915: don't save all the encoder/crtc state in set_config Daniel Vetter
2012-07-26 18:49 ` [PATCH 51/76] drm/i915: stage modeset output changes Daniel Vetter
2012-07-26 18:49 ` [PATCH 52/76] drm/i915: push crtc->fb update into pipe_set_base Daniel Vetter
2012-07-26 18:49 ` [PATCH 53/76] drm/i915: remove crtc disabling special case Daniel Vetter
2012-07-26 18:49 ` [PATCH 54/76] drm/i915: move output commit and crtc disabling into set_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 55/76] drm/i915: extract adjusted mode computation Daniel Vetter
2012-07-26 18:49 ` [PATCH 56/76] drm/i915: use staged outuput config in tv->mode_fixup Daniel Vetter
2012-07-26 18:49 ` [PATCH 57/76] drm/i915: use staged outuput config in lvds->mode_fixup Daniel Vetter
2012-07-26 18:49 ` [PATCH 58/76] drm/i915: compute masks of crtcs affected in set_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 59/76] drm/i915: implement new set_mode code flow Daniel Vetter
2012-07-26 18:49 ` [PATCH 60/76] drm/i915: push commit_output_state past crtc disabling Daniel Vetter
2012-07-26 18:49 ` [PATCH 61/76] drm/i915: s/intel_encoder_disable/intel_encoder_noop Daniel Vetter
2012-07-26 18:49 ` [PATCH 62/76] drm/i915: WARN if the pipe won't turn off Daniel Vetter
2012-07-26 18:49 ` [PATCH 63/76] drm/i915: switch the load detect code to the staged modeset config Daniel Vetter
2012-07-26 18:49 ` [PATCH 64/76] drm/i915: push commit_output_state past the crtc/encoder preparing Daniel Vetter
2012-07-26 18:49 ` [PATCH 65/76] drm/i915: disable all crtcs at suspend time Daniel Vetter
2012-07-26 18:49 ` [PATCH 66/76] drm/i915: add tons of modeset state checks Daniel Vetter
2012-07-26 18:49 ` [PATCH 67/76] drm/i915: rip out intel_disable_pch_ports Daniel Vetter
2012-07-26 18:49 ` [PATCH 68/76] drm/i915: don't disable fdi links harder in ilk_crtc_enable Daniel Vetter
2012-07-26 18:49 ` [PATCH 69/76] drm/i915: don't call dpms funcs after set_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 70/76] drm/i915: update dpms property in set_mode Daniel Vetter
2012-07-26 18:49 ` [PATCH 71/76] drm/i915: add encoder->pre_enable/post_disable Daniel Vetter
2012-07-26 18:49 ` [PATCH 72/76] drm/i915: clean up the cpu edp pll special case Daniel Vetter
2012-07-26 18:49 ` [PATCH 73/76] drm/i915: robustify edp_pll_on/off Daniel Vetter
2012-07-26 18:49 ` [PATCH 74/76] drm/i915: rip out dp port enabling cludges^Wchecks Daniel Vetter
2012-07-26 18:49 ` [PATCH 75/76] drm/i915: disable the cpu edp port after the cpu pipe Daniel Vetter
2012-07-26 18:49 ` [PATCH 76/76] drm/i915: move encoder->mode_set calls to crtc_mode_set Daniel Vetter

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