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Commit 9aca813e authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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[media] v4l: vsp1: bru: Support non-premultiplied colors at the BRU output 



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: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 6418b4d6

drivers/media/platform/vsp1/vsp1_bru.c

+9 −2
Original line number Diff line number Diff line
@@ -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.