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drm/i915: Use pipe A primary plane .max_stride() as the global stride limit

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Let's assume that the primary plane for pipe A has the highest max
stride of all planes, and we'll use that as the global limit when
creating a new framebuffer.

Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180907152413.15761-4-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2018-09-07 18:24:03 +03:00
parent ddd5713d6e
commit 645d91f606
1 changed files with 10 additions and 23 deletions
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33
drivers/gpu/drm/i915/intel_display.c
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@ -14432,31 +14432,18 @@ static
u32 intel_fb_pitch_limit(struct drm_i915_private *dev_priv,
uint64_t fb_modifier, uint32_t pixel_format)
{
u32 gen = INTEL_GEN(dev_priv);
struct intel_crtc *crtc;
struct intel_plane *plane;
if (gen >= 9) {
int cpp = drm_format_plane_cpp(pixel_format, 0);
/*
* We assume the primary plane for pipe A has
* the highest stride limits of them all.
*/
crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
plane = to_intel_plane(crtc->base.primary);
/* "The stride in bytes must not exceed the of the size of 8K
* pixels and 32K bytes."
*/
return min(8192 * cpp, 32768);
} else if (gen >= 5 && !HAS_GMCH_DISPLAY(dev_priv)) {
return 32*1024;
} else if (gen >= 4) {
if (fb_modifier == I915_FORMAT_MOD_X_TILED)
return 16*1024;
else
return 32*1024;
} else if (gen >= 3) {
if (fb_modifier == I915_FORMAT_MOD_X_TILED)
return 8*1024;
else
return 16*1024;
} else {
/* XXX DSPC is limited to 4k tiled */
return 8*1024;
}
return plane->max_stride(plane, pixel_format, fb_modifier,
DRM_MODE_ROTATE_0);
}
static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,