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drm/vc4: Add support for scaling of display planes.

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This implements a simple policy for choosing scaling modes
(trapezoidal for decimation, PPF for magnification), and a single PPF
filter (Mitchell/Netravali's recommendation).

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt
2015-10-20 16:06:57 +01:00
parent f863e35601
commit 21af94cf1a
4 changed files with 375 additions and 14 deletions
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4
drivers/gpu/drm/vc4/vc4_drv.h
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@@ -155,7 +155,11 @@ struct vc4_hvs {
* list. Units are dwords.
*/
struct drm_mm dlist_mm;
/* Memory manager for the LBM memory used by HVS scaling. */
struct drm_mm lbm_mm;
spinlock_t mm_lock;
struct drm_mm_node mitchell_netravali_filter;
};
struct vc4_plane {