Hi Niklas,
Thank you for the patch.
On Mon, Oct 14, 2019 at 02:16:15AM +0200, Niklas Söderlund wrote:
> Most Gen3 boards can output frames in NV12 format, add support for this
> with a runtime check that the running hardware supports it.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
> Reviewed-by: Simon Horman <horms+rene...@verge.net.au>
> ---
> drivers/media/platform/rcar-vin/rcar-dma.c | 5 ++-
> drivers/media/platform/rcar-vin/rcar-v4l2.c | 39 +++++++++++++++++----
> 2 files changed, 37 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c
> b/drivers/media/platform/rcar-vin/rcar-dma.c
> index af4f774149f08597..cf9029efeb0450cb 100644
> --- a/drivers/media/platform/rcar-vin/rcar-dma.c
> +++ b/drivers/media/platform/rcar-vin/rcar-dma.c
> @@ -118,6 +118,7 @@
> #define VNDMR_ABIT (1 << 2)
> #define VNDMR_DTMD_YCSEP (1 << 1)
While at it, I would define this as (2 << 0).
> #define VNDMR_DTMD_ARGB (1 << 0)
> +#define VNDMR_DTMD_YCSEP_420 (3 << 0)
>
> /* Video n Data Mode Register 2 bits */
> #define VNDMR2_VPS (1 << 30)
> @@ -701,11 +702,13 @@ static int rvin_setup(struct rvin_dev *vin)
> * Output format
> */
> switch (vin->format.pixelformat) {
> + case V4L2_PIX_FMT_NV12:
> case V4L2_PIX_FMT_NV16:
> rvin_write(vin,
> ALIGN(vin->format.bytesperline * vin->format.height,
> 0x80), VNUVAOF_REG);
> - dmr = VNDMR_DTMD_YCSEP;
> + dmr = vin->format.pixelformat == V4L2_PIX_FMT_NV12 ?
> + VNDMR_DTMD_YCSEP_420 : VNDMR_DTMD_YCSEP;
According to the datasheet, VNDMR_DTMD_YCSEP_420 is only valid for some
of the channels (see footnote of the VnDMR register documentation).
> output_is_yuv = true;
> break;
> case V4L2_PIX_FMT_YUYV:
> diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> index 13b7cd5d2e40415a..9e2e63ffcc47acad 100644
> --- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> +++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> @@ -30,6 +30,10 @@
> */
>
> static const struct rvin_video_format rvin_formats[] = {
> + {
> + .fourcc = V4L2_PIX_FMT_NV12,
> + .bpp = 1,
> + },
> {
> .fourcc = V4L2_PIX_FMT_NV16,
> .bpp = 1,
> @@ -72,6 +76,9 @@ const struct rvin_video_format
> *rvin_format_from_pixel(struct rvin_dev *vin,
> if (vin->info->model == RCAR_M1 && pixelformat == V4L2_PIX_FMT_XBGR32)
> return NULL;
>
> + if (pixelformat == V4L2_PIX_FMT_NV12 && !vin->info->nv12)
> + return NULL;
> +
> for (i = 0; i < ARRAY_SIZE(rvin_formats); i++)
> if (rvin_formats[i].fourcc == pixelformat)
> return rvin_formats + i;
> @@ -90,17 +97,29 @@ static u32 rvin_format_bytesperline(struct rvin_dev *vin,
> if (WARN_ON(!fmt))
> return -EINVAL;
>
> - align = pix->pixelformat == V4L2_PIX_FMT_NV16 ? 0x20 : 0x10;
> + switch (pix->pixelformat) {
> + case V4L2_PIX_FMT_NV12:
> + case V4L2_PIX_FMT_NV16:
> + align = 0x20;
> + break;
> + default:
> + align = 0x10;
> + break;
> + }
>
> return ALIGN(pix->width, align) * fmt->bpp;
> }
>
> static u32 rvin_format_sizeimage(struct v4l2_pix_format *pix)
> {
> - if (pix->pixelformat == V4L2_PIX_FMT_NV16)
> + switch (pix->pixelformat) {
> + case V4L2_PIX_FMT_NV12:
> + return pix->bytesperline * pix->height * 3 / 2;
> + case V4L2_PIX_FMT_NV16:
> return pix->bytesperline * pix->height * 2;
> -
> - return pix->bytesperline * pix->height;
> + default:
> + return pix->bytesperline * pix->height;
> + }
> }
>
> static void rvin_format_align(struct rvin_dev *vin, struct v4l2_pix_format
> *pix)
> @@ -124,8 +143,16 @@ static void rvin_format_align(struct rvin_dev *vin,
> struct v4l2_pix_format *pix)
> break;
> }
>
> - /* HW limit width to a multiple of 32 (2^5) for NV16 else 2 (2^1) */
> - walign = vin->format.pixelformat == V4L2_PIX_FMT_NV16 ? 5 : 1;
> + /* HW limit width to a multiple of 32 (2^5) for NV12/16 else 2 (2^1) */
> + switch (vin->format.pixelformat) {
> + case V4L2_PIX_FMT_NV12:
> + case V4L2_PIX_FMT_NV16:
> + walign = 5;
> + break;
> + default:
> + walign = 1;
> + break;
> + }
>
> /* Limit to VIN capabilities */
> v4l_bound_align_image(&pix->width, 2, vin->info->max_width, walign,
--
Regards,
Laurent Pinchart
