media: hantro: Add quirk for NV12/NV12_4L4 capture format

The G2 core decoder engine produces NV12_4L4 format,
which is a simple NV12 4x4 tiled format. The driver currently
hides this format by always enabling the post-processor engine,
and therefore offering NV12 directly.

This is done without using the logic in hantro_postproc.c
and therefore makes it difficult to add VP9 cleanly.

Since fixing this is not easy, add a small quirk to force
NV12 if HEVC was configured, but otherwise declare NV12_4L4
as the pixel format in imx8mq_vpu_g2_variant.dec_fmts.

This will be used by the VP9 decoder which will be added soon.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
index bcb0bdf..d1f060c 100644 (file)
--- a/drivers/staging/media/hantro/hantro_v4l2.c
+++ b/drivers/staging/media/hantro/hantro_v4l2.c
@@ -151,6 +151,20 @@ static int vidioc_enum_fmt(struct file *file, void *priv,
        bool skip_mode_none;
 
        /*
+        * The HEVC decoder on the G2 core needs a little quirk to offer NV12
+        * only on the capture side. Once the post-processor logic is used,
+        * we will be able to expose NV12_4L4 and NV12 as the other cases,
+        * and therefore remove this quirk.
+        */
+       if (capture && ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_HEVC_SLICE) {
+               if (f->index == 0) {
+                       f->pixelformat = V4L2_PIX_FMT_NV12;
+                       return 0;
+               }
+               return -EINVAL;
+       }
+
+       /*
         * When dealing with an encoder:
         *  - on the capture side we want to filter out all MODE_NONE formats.
         *  - on the output side we want to filter out all formats that are

diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
index 02e6143..a40b161 100644 (file)
--- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
+++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
@@ -134,7 +134,7 @@ static const struct hantro_fmt imx8m_vpu_dec_fmts[] = {
 
 static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
        {
-               .fourcc = V4L2_PIX_FMT_NV12,
+               .fourcc = V4L2_PIX_FMT_NV12_4L4,
                .codec_mode = HANTRO_MODE_NONE,
        },
        {