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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 29/76] drm/i915: WARN when trying to enabled an unused crtc
Date: Thu, 26 Jul 2012 20:48:54 +0200
Message-ID: <1343328581-2324-30-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1343328581-2324-1-git-send-email-daniel.vetter@ffwll.ch>

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 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 177795a..428e0ed 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3214,6 +3214,8 @@ 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)
@@ -3390,6 +3392,8 @@ 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 4145a1d..0f2a42e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -157,7 +157,15 @@ 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 lowfreq_avail;
 	struct intel_overlay *overlay;
-- 
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 ` Daniel Vetter [this message]
2012-07-26 18:48 ` [PATCH 30/76] drm/i915: Add interfaces to read out encoder/connector hw state Daniel Vetter
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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