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drm/i915: Fail if we can't get a fence for gen2/3 tiled scanout 

Gen2/3 display engine depends on the fence for tiled scanout. So if we
fail to get a fence fail the entire operation.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180221160235.11134-2-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Ville Syrjälä 2018-02-21 18:02:30 +02:00
parent db9c06dfff
commit 85798ac9b3
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/i915/intel_display.c
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@ -2123,6 +2123,8 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
goto err;
if (i915_vma_is_map_and_fenceable(vma)) {
int ret;
/* Install a fence for tiled scan-out. Pre-i965 always needs a
* fence, whereas 965+ only requires a fence if using
* framebuffer compression. For simplicity, we always, when
@ -2139,7 +2141,13 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
* something and try to run the system in a "less than optimal"
* mode that matches the user configuration.
*/
if (i915_vma_pin_fence(vma) == 0 && vma->fence)
ret = i915_vma_pin_fence(vma);
if (ret != 0 && INTEL_GEN(dev_priv) < 4) {
vma = ERR_PTR(ret);
goto err;
}
if (ret == 0 && vma->fence)
*out_flags |= PLANE_HAS_FENCE;
}