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[media] v4l: vsp1: bru: Support non-premultiplied colors at the BRU output

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The BRU outputs premultiplied colors, enable color data normalization
when the format configured at the output of the pipeline isn't
premultiplied.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Laurent Pinchart 2014-05-27 20:35:36 -03:00 committed by Mauro Carvalho Chehab
parent 6418b4d6e1
commit 9aca813e14
1 changed files with 9 additions and 2 deletions
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11
drivers/media/platform/vsp1/vsp1_bru.c
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@ -43,8 +43,10 @@ static inline void vsp1_bru_write(struct vsp1_bru *bru, u32 reg, u32 data)
static int bru_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
struct vsp1_bru *bru = to_bru(subdev);
struct v4l2_mbus_framefmt *format;
unsigned int flags;
unsigned int i;
if (!enable)
@ -58,8 +60,13 @@ static int bru_s_stream(struct v4l2_subdev *subdev, int enable)
* to sane default values for now.
*/
/* Disable both color data normalization and dithering. */
vsp1_bru_write(bru, VI6_BRU_INCTRL, 0);
/* Disable dithering and enable color data normalization unless the
* format at the pipeline output is premultiplied.
*/
flags = pipe->output ? pipe->output->video.format.flags : 0;
vsp1_bru_write(bru, VI6_BRU_INCTRL,
flags & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA ?
0 : VI6_BRU_INCTRL_NRM);
/* Set the background position to cover the whole output image and
* set its color to opaque black.