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Subject[PATCH v2 3/3] media: vimc: deb: Add support for {RGB,BGR,GBR}888 bus formats on source pad
Add support for RGB888_*, BGR888_* and GBR888_* media bus formats on
the source pad of debayer subdevices.

Co-developed-by: Vitor Massaru Iha <vitor@massaru.org>
Signed-off-by: Vitor Massaru Iha <vitor@massaru.org>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@protonmail.com>
---

Changes in v2:
- Change commit message to reflect v2 changes
- Rename variables
- Fix array formatting
- Add vimc_deb_is_src_code_valid function
- Add other BGR888 and RGB888 formats to debayer source pad supported
formats

drivers/media/platform/vimc/vimc-debayer.c | 61 +++++++++++++++++-----
1 file changed, 49 insertions(+), 12 deletions(-)

diff --git a/drivers/media/platform/vimc/vimc-debayer.c b/drivers/media/platform/vimc/vimc-debayer.c
index baf6bf9f65b5..33a9bea770bc 100644
--- a/drivers/media/platform/vimc/vimc-debayer.c
+++ b/drivers/media/platform/vimc/vimc-debayer.c
@@ -51,6 +51,19 @@ static const struct v4l2_mbus_framefmt sink_fmt_default = {
.colorspace = V4L2_COLORSPACE_DEFAULT,
};

+static const u32 vimc_deb_src_mbus_codes[] = {
+ MEDIA_BUS_FMT_GBR888_1X24,
+ MEDIA_BUS_FMT_BGR888_1X24,
+ MEDIA_BUS_FMT_BGR888_3X8,
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_RGB888_2X12_BE,
+ MEDIA_BUS_FMT_RGB888_2X12_LE,
+ MEDIA_BUS_FMT_RGB888_3X8,
+ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+ MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
+ MEDIA_BUS_FMT_RGB888_1X32_PADHI,
+};
+
static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = {
{
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
@@ -125,6 +138,17 @@ static const struct vimc_deb_pix_map *vimc_deb_pix_map_by_code(u32 code)
return NULL;
}

+static int vimc_deb_is_src_code_invalid(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(vimc_deb_src_mbus_codes); i++)
+ if (vimc_deb_src_mbus_codes[i] == code)
+ return 0;
+
+ return -EINVAL;
+}
+
static int vimc_deb_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg)
{
@@ -148,14 +172,11 @@ static int vimc_deb_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
- /* We only support one format for source pads */
if (VIMC_IS_SRC(code->pad)) {
- struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
-
- if (code->index)
+ if (code->index >= ARRAY_SIZE(vimc_deb_src_mbus_codes))
return -EINVAL;

- code->code = vdeb->src_code;
+ code->code = vimc_deb_src_mbus_codes[code->index];
} else {
if (code->index >= ARRAY_SIZE(vimc_deb_pix_map_list))
return -EINVAL;
@@ -170,8 +191,6 @@ static int vimc_deb_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
- struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
-
if (fse->index)
return -EINVAL;

@@ -181,7 +200,7 @@ static int vimc_deb_enum_frame_size(struct v4l2_subdev *sd,

if (!vpix)
return -EINVAL;
- } else if (fse->code != vdeb->src_code) {
+ } else if (vimc_deb_is_src_code_invalid(fse->code)) {
return -EINVAL;
}

@@ -237,6 +256,7 @@ static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *sink_fmt;
+ u32 *src_code;

if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
/* Do not change the format while stream is on */
@@ -244,8 +264,10 @@ static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
return -EBUSY;

sink_fmt = &vdeb->sink_fmt;
+ src_code = &vdeb->src_code;
} else {
sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+ src_code = &v4l2_subdev_get_try_format(sd, cfg, 1)->code;
}

/*
@@ -253,9 +275,14 @@ static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
* it is propagated from the sink
*/
if (VIMC_IS_SRC(fmt->pad)) {
+ u32 code = fmt->format.code;
+
fmt->format = *sink_fmt;
- /* TODO: Add support for other formats */
- fmt->format.code = vdeb->src_code;
+
+ if (!vimc_deb_is_src_code_invalid(code))
+ *src_code = code;
+
+ fmt->format.code = *src_code;
} else {
/* Set the new format in the sink pad */
vimc_deb_adjust_sink_fmt(&fmt->format);
@@ -291,11 +318,21 @@ static void vimc_deb_set_rgb_mbus_fmt_rgb888_1x24(struct vimc_deb_device *vdeb,
unsigned int col,
unsigned int rgb[3])
{
+ const struct vimc_pix_map *vpix;
unsigned int i, index;

+ vpix = vimc_pix_map_by_code(vdeb->src_code);
index = VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3);
- for (i = 0; i < 3; i++)
- vdeb->src_frame[index + i] = rgb[i];
+ for (i = 0; i < 3; i++) {
+ switch (vpix->pixelformat) {
+ case V4L2_PIX_FMT_RGB24:
+ vdeb->src_frame[index + i] = rgb[i];
+ break;
+ case V4L2_PIX_FMT_BGR24:
+ vdeb->src_frame[index + i] = rgb[2-i];
+ break;
+ }
+ }
}

static int vimc_deb_s_stream(struct v4l2_subdev *sd, int enable)
--
2.25.2

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