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media: rcar-vin: Add support for RGB formats with alpha component 

The R-Car VIN module supports V4L2_PIX_FMT_ARGB555 and
V4L2_PIX_FMT_ABGR32 pixel formats. Add the hardware register setup and
allow the alpha component to be changed while streaming using the
V4L2_CID_ALPHA_COMPONENT control.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warning for macro VNDMR_A8BIT]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Niklas Söderlund 2019-07-04 13:16:01 -04:00 committed by Mauro Carvalho Chehab
parent 5720c7331f
commit 1d99e68ce7
2 changed files with 43 additions and 0 deletions
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35
drivers/media/platform/rcar-vin/rcar-dma.c
View File

@ -111,8 +111,11 @@
#define VNIE_EFE (1 << 1)
/* Video n Data Mode Register bits */
#define VNDMR_A8BIT(n) (((n) & 0xff) << 24)
#define VNDMR_A8BIT_MASK (0xff << 24)
#define VNDMR_EXRGB (1 << 8)
#define VNDMR_BPSM (1 << 4)
#define VNDMR_ABIT (1 << 2)
#define VNDMR_DTMD_YCSEP (1 << 1)
#define VNDMR_DTMD_ARGB (1 << 0)
@ -730,6 +733,12 @@ static int rvin_setup(struct rvin_dev *vin)
/* Note: not supported on M1 */
dmr = VNDMR_EXRGB;
break;
case V4L2_PIX_FMT_ARGB555:
dmr = (vin->alpha ? VNDMR_ABIT : 0) | VNDMR_DTMD_ARGB;
break;
case V4L2_PIX_FMT_ABGR32:
dmr = VNDMR_A8BIT(vin->alpha) | VNDMR_EXRGB | VNDMR_DTMD_ARGB;
break;
default:
vin_err(vin, "Invalid pixelformat (0x%x)\n",
vin->format.pixelformat);
@ -1346,5 +1355,31 @@ int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel)
void rvin_set_alpha(struct rvin_dev *vin, unsigned int alpha)
{
unsigned long flags;
u32 dmr;
spin_lock_irqsave(&vin->qlock, flags);
vin->alpha = alpha;
if (vin->state == STOPPED)
goto out;
switch (vin->format.pixelformat) {
case V4L2_PIX_FMT_ARGB555:
dmr = rvin_read(vin, VNDMR_REG) & ~VNDMR_ABIT;
if (vin->alpha)
dmr |= VNDMR_ABIT;
break;
case V4L2_PIX_FMT_ABGR32:
dmr = rvin_read(vin, VNDMR_REG) & ~VNDMR_A8BIT_MASK;
dmr |= VNDMR_A8BIT(vin->alpha);
break;
default:
goto out;
}
rvin_write(vin, dmr, VNDMR_REG);
out:
spin_unlock_irqrestore(&vin->qlock, flags);
}

8
drivers/media/platform/rcar-vin/rcar-v4l2.c
View File

@ -54,6 +54,14 @@ static const struct rvin_video_format rvin_formats[] = {
.fourcc = V4L2_PIX_FMT_XBGR32,
.bpp = 4,
},
{
.fourcc = V4L2_PIX_FMT_ARGB555,
.bpp = 2,
},
{
.fourcc = V4L2_PIX_FMT_ABGR32,
.bpp = 4,
},
};
const struct rvin_video_format *rvin_format_from_pixel(struct rvin_dev *vin,