This patch allows system to safely recover after kms_psr_sink_crc check or any other similar case that might fail when PSR is enabled. Ville made and sent me this patch after noticing that primary plane enabled bit was set during test case and unset after failure. What was causing a hard and non-recoverable blank screen. After the failure when alternating from fbcon to x section it was possible to see and move mouse cursor, but nothing else. Everything else was fully black. A for dpms off/on also haleped to get screen back. But this patch seeting primary plane enabled bit propertly seemed more clean. v2: Fix identation issue. v3: Add the XXX comment. Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2e05d1e..e23ff4c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2118,6 +2118,9 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb, if (IS_G4X(dev)) dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE; + if (intel_crtc->primary_enabled) + dspcntr |= DISPLAY_PLANE_ENABLE; + I915_WRITE(reg, dspcntr); linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8); @@ -2215,6 +2218,9 @@ static int ironlake_update_plane(struct drm_crtc *crtc, else dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE; + if (intel_crtc->primary_enabled) + dspcntr |= DISPLAY_PLANE_ENABLE; + I915_WRITE(reg, dspcntr); linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8); @@ -8633,6 +8639,13 @@ static int intel_gen7_queue_flip(struct drm_device *dev, intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset); intel_ring_emit(ring, (MI_NOOP)); + /* XXX: Ugly hack to avoid PSR test case eventually breaking things up + * to be removed whenever it is fixed. */ + if (IS_VALLEYVIEW(dev) && intel_crtc->primary_enabled) + I915_WRITE(DSPCNTR(intel_crtc->plane), + I915_READ(DSPCNTR(intel_crtc->plane)) + | DISPLAY_PLANE_ENABLE); + intel_mark_page_flip_active(intel_crtc); __intel_ring_advance(ring); return 0; -- 1.8.3.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
