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drm/i915: fixup the plane->pipe fixup code

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We need to check whether the _other plane is on our pipe, not whether
our plane is on the other pipe. Otherwise if not both pipes/planes are
active, we won't properly clean up the mess and set up our desired
plane->pipe mapping.

v2: Fixup the logic, I've totally fumbled it. Noticed by Chris Wilson.

v3: I've checked Bspec, and the flexible plane->pipe mapping is a
gen2/3 feature, so test for that instead of PCH_SPLIT

v4: Check whether we indeed have 2 pipes before checking the other
pipe, to avoid upsetting i845g/i865g. Noticed by Chris Wilson.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=51265
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49838
Tested-by: Dave Airlie <airlied@gmail.com>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk> #855gm
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-10-10 23:14:00 +02:00
parent ccd0d36e2a
commit fa55583797
1 changed files with 23 additions and 11 deletions
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34
drivers/gpu/drm/i915/intel_display.c
View file

@ -8058,29 +8058,42 @@ static void intel_enable_pipe_a(struct drm_device *dev)
}
static bool
intel_check_plane_mapping(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
u32 reg, val;
if (dev_priv->num_pipe == 1)
return true;
reg = DSPCNTR(!crtc->plane);
val = I915_READ(reg);
if ((val & DISPLAY_PLANE_ENABLE) &&
(!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
return false;
return true;
}
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;
u32 reg;
/* 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)) {
* disable the crtc (and hence change the state) if it is wrong. Note
* that gen4+ has a fixed plane -> pipe mapping. */
if (INTEL_INFO(dev)->gen < 4 && !intel_check_plane_mapping(crtc)) {
struct intel_connector *connector;
bool plane;
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);
@ -8104,7 +8117,6 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
WARN_ON(crtc->active);
crtc->base.enabled = false;
}
ok:
if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
crtc->pipe == PIPE_A && !crtc->active) {