From: Rodrigo Vivi <rodrigo.vivi@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org, Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: [PATCH 6/6] drm/i915: Sanitize drm crtc vblank counter after DC reset frame count.
Date: Wed, 3 Aug 2016 14:33:39 -0700 [thread overview]
Message-ID: <1470260019-6173-7-git-send-email-rodrigo.vivi@intel.com> (raw)
In-Reply-To: <1470260019-6173-1-git-send-email-rodrigo.vivi@intel.com>
DC state reset the frame counter that is a read-only register.
So, besides blocking DC state on vblank let's restore the
drm crtc vblank counter to a place we know it is reliable.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 4efe20c..82d6896 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2759,7 +2759,9 @@ static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
static void gen9_prepare_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
intel_display_power_get(dev_priv, POWER_DOMAIN_VBLANK);
+ drm_crtc_vblank_sanitize_counter(crtc);
}
static void gen9_unprepare_vblank(struct drm_device *dev, unsigned int pipe)
--
2.4.3
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next prev parent reply other threads:[~2016-08-03 21:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-03 21:33 [PATCH 0/6] Allow DC state to reset the counter on screen enabled Rodrigo Vivi
2016-08-03 21:33 ` [PATCH 1/6] drm: Add vblank prepare and unprepare hooks Rodrigo Vivi
2016-08-04 8:49 ` [Intel-gfx] " Daniel Vetter
2016-08-03 21:33 ` [PATCH 2/6] drm/i915: Move drm_crtc_vblank_get out of disabled pre-emption area Rodrigo Vivi
2016-08-04 8:52 ` Daniel Vetter
2016-08-03 21:33 ` [PATCH 3/6] drm/i915: Split gen 9 irq hooks definitions Rodrigo Vivi
2016-08-03 21:33 ` [PATCH 4/6] drm/i915: Introduce vblank power domain to avoid DC entry when waiting for vblank Rodrigo Vivi
2016-08-03 21:33 ` [PATCH 5/6] drm: Introduce drm_crtc_vblank_sanitize_counter Rodrigo Vivi
2016-08-04 8:32 ` Daniel Vetter
2016-08-03 21:33 ` Rodrigo Vivi [this message]
2016-08-04 8:26 ` [PATCH 6/6] drm/i915: Sanitize drm crtc vblank counter after DC reset frame count Daniel Vetter
2016-08-05 21:49 ` Rodrigo Vivi
2016-08-08 8:12 ` Daniel Vetter
2016-08-04 2:39 ` [PATCH 0/6] Allow DC state to reset the counter on screen enabled Michel Dänzer
2016-08-04 5:50 ` ✗ Ro.CI.BAT: failure for " Patchwork
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