On Tue, Oct 16, 2018 at 07:00:11PM +0300, Imre Deak wrote:
If BIOS configured a Y tiled FB we failed to set up the backing object tiling accordingly, leading to a lack of GT fence installed and a garbled console.
The problem was bisected to commit 011f22eb545a ("drm/i915: Do NOT skip the first 4k of stolen memory for pre-allocated buffers v2") but it just revealed a pre-existing issue.
Kudos to Ville who suspected a missing fence looking at the corruption on the screen.
Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Mika Westerberg mika.westerberg@linux.intel.com Cc: Hans de Goede hdegoede@redhat.com Cc: ronald@innovation.ch Cc: stable@vger.kernel.org Reported-by: Mika Westerberg mika.westerberg@linux.intel.com Reported-by: ronald@innovation.ch Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108264 Fixes: bc8d7dffacb1 ("drm/i915/skl: Provide a Skylake version of get_plane_config()") Signed-off-by: Imre Deak imre.deak@intel.com
lgtm Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com
drivers/gpu/drm/i915/intel_display.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a2e729fa8d64..3d34b98c4634 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2674,6 +2674,17 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc, if (size_aligned * 2 > dev_priv->stolen_usable_size) return false;
- switch (fb->modifier) {
- case DRM_FORMAT_MOD_LINEAR:
- case I915_FORMAT_MOD_X_TILED:
- case I915_FORMAT_MOD_Y_TILED:
break;- default:
DRM_DEBUG_DRIVER("Unsupported modifier for initial FB: 0x%llx\n",fb->modifier);return false;- }
- mutex_lock(&dev->struct_mutex); obj = i915_gem_object_create_stolen_for_preallocated(dev_priv, base_aligned,
@@ -2683,8 +2694,17 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc, if (!obj) return false;
- if (plane_config->tiling == I915_TILING_X)
obj->tiling_and_stride = fb->pitches[0] | I915_TILING_X;
- switch (plane_config->tiling) {
- case I915_TILING_NONE:
break;- case I915_TILING_X:
- case I915_TILING_Y:
obj->tiling_and_stride = fb->pitches[0] | plane_config->tiling;break;- default:
MISSING_CASE(plane_config->tiling);return false;- }
mode_cmd.pixel_format = fb->format->format; mode_cmd.width = fb->width; @@ -8827,6 +8847,7 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc, fb->modifier = I915_FORMAT_MOD_X_TILED; break; case PLANE_CTL_TILED_Y:
plane_config->tiling = I915_TILING_Y;-- 2.13.2