[Intel-gfx] [PATCH] drm/i915: Detect invalid scanout pitches
Chris Wilson
chris at chris-wilson.co.uk
Tue Jun 25 18:26:45 CEST 2013
Report back the user error of attempting to setup a CRTC with an invalid
framebuffer pitch. This is trickier than it should be as on gen4, there
is a restriction that tiled surfaces must have a stride less than 16k -
which is less than the largest supported CRTC size.
v2: Fix the limits for gen3
v3: Move check into intel_framebuffer_init() and fix VLV limits. (vsyrjala)
v4: Use idiomatic '>=' for generation checks
References: https://bugs.freedesktop.org/show_bug.cgi?id=65099
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 25 +++++++++++++++++++++----
1 file changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0d76595..ae6f71f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9224,6 +9224,7 @@ int intel_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_i915_gem_object *obj)
{
+ int pitch_limit;
int ret;
if (obj->tiling_mode == I915_TILING_Y) {
@@ -9237,10 +9238,26 @@ int intel_framebuffer_init(struct drm_device *dev,
return -EINVAL;
}
- /* FIXME <= Gen4 stride limits are bit unclear */
- if (mode_cmd->pitches[0] > 32768) {
- DRM_DEBUG("pitch (%d) must be at less than 32768\n",
- mode_cmd->pitches[0]);
+ if (INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev)) {
+ pitch_limit = 32*1024;
+ } else if (INTEL_INFO(dev)->gen >= 4) {
+ if (obj->tiling_mode)
+ pitch_limit = 16*1024;
+ else
+ pitch_limit = 32*1024;
+ } else if (INTEL_INFO(dev)->gen >= 3) {
+ if (obj->tiling_mode)
+ pitch_limit = 8*1024;
+ else
+ pitch_limit = 16*1024;
+ } else
+ /* XXX DSPC is limited to 4k tiled */
+ pitch_limit = 8*1024;
+
+ if (mode_cmd->pitches[0] > pitch_limit) {
+ DRM_DEBUG("%s pitch (%d) must be at less than %d\n",
+ obj->tiling_mode ? "tiled" : "linear",
+ mode_cmd->pitches[0], pitch_limit);
return -EINVAL;
}
--
1.8.3.1
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