[PATCH v3 1/3] media: vimc: Support multiple media bus codes for each pixelformat

From: NÃcolas F. R. A. Prado
Date: Mon Apr 27 2020 - 19:03:07 EST

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Change vimc_pix_map_list to allow multiple media bus codes to map to the
same pixelformat, making it possible to add media bus codes for which
there are no pixelformat.

Acked-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
Signed-off-by: NÃcolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxxx>
---

Changes in v3:
- Make loop in vimc_mbus_code_by_index() clearer by using break instead of if
- Use VIMC_PIX_FMT_MAX_CODES define instead of hardcoded value for the size of
code array in struct vimc_pix_map

Changes in v2:
- Fix vimc_mbus_code_by_index not checking code array bounds
- Fix array formatting
- Rename variables
- Change code array size
- Add comment about vimc_mbus_code_by_index return value

drivers/media/test-drivers/vimc/vimc-common.c | 71 ++++++++++++-------
drivers/media/test-drivers/vimc/vimc-common.h | 13 +++-
drivers/media/test-drivers/vimc/vimc-scaler.c | 10 ++-
drivers/media/test-drivers/vimc/vimc-sensor.c | 6 +-
4 files changed, 68 insertions(+), 32 deletions(-)

diff --git a/drivers/media/test-drivers/vimc/vimc-common.c b/drivers/media/test-drivers/vimc/vimc-common.c
index c95c17c048f2..e11107e4796c 100644
--- a/drivers/media/test-drivers/vimc/vimc-common.c
+++ b/drivers/media/test-drivers/vimc/vimc-common.c
@@ -19,19 +19,19 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {

/* RGB formats */
{
- .code = MEDIA_BUS_FMT_BGR888_1X24,
+ .code = { MEDIA_BUS_FMT_BGR888_1X24 },
.pixelformat = V4L2_PIX_FMT_BGR24,
.bpp = 3,
.bayer = false,
},
{
- .code = MEDIA_BUS_FMT_RGB888_1X24,
+ .code = { MEDIA_BUS_FMT_RGB888_1X24 },
.pixelformat = V4L2_PIX_FMT_RGB24,
.bpp = 3,
.bayer = false,
},
{
- .code = MEDIA_BUS_FMT_ARGB8888_1X32,
+ .code = { MEDIA_BUS_FMT_ARGB8888_1X32 },
.pixelformat = V4L2_PIX_FMT_ARGB32,
.bpp = 4,
.bayer = false,
@@ -39,49 +39,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {

/* Bayer formats */
{
- .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .code = { MEDIA_BUS_FMT_SBGGR8_1X8 },
.pixelformat = V4L2_PIX_FMT_SBGGR8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .code = { MEDIA_BUS_FMT_SGBRG8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGBRG8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .code = { MEDIA_BUS_FMT_SGRBG8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGRBG8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .code = { MEDIA_BUS_FMT_SRGGB8_1X8 },
.pixelformat = V4L2_PIX_FMT_SRGGB8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .code = { MEDIA_BUS_FMT_SBGGR10_1X10 },
.pixelformat = V4L2_PIX_FMT_SBGGR10,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .code = { MEDIA_BUS_FMT_SGBRG10_1X10 },
.pixelformat = V4L2_PIX_FMT_SGBRG10,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .code = { MEDIA_BUS_FMT_SGRBG10_1X10 },
.pixelformat = V4L2_PIX_FMT_SGRBG10,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .code = { MEDIA_BUS_FMT_SRGGB10_1X10 },
.pixelformat = V4L2_PIX_FMT_SRGGB10,
.bpp = 2,
.bayer = true,
@@ -89,25 +89,25 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {

/* 10bit raw bayer a-law compressed to 8 bits */
{
- .code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
+ .code = { MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8 },
.pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
+ .code = { MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
+ .code = { MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
+ .code = { MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8 },
.pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
.bpp = 1,
.bayer = true,
@@ -115,49 +115,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {

/* 10bit raw bayer DPCM compressed to 8 bits */
{
- .code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
+ .code = { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 },
.pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
+ .code = { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
+ .code = { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 },
.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
+ .code = { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 },
.pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
.bpp = 1,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .code = { MEDIA_BUS_FMT_SBGGR12_1X12 },
.pixelformat = V4L2_PIX_FMT_SBGGR12,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .code = { MEDIA_BUS_FMT_SGBRG12_1X12 },
.pixelformat = V4L2_PIX_FMT_SGBRG12,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .code = { MEDIA_BUS_FMT_SGRBG12_1X12 },
.pixelformat = V4L2_PIX_FMT_SGRBG12,
.bpp = 2,
.bayer = true,
},
{
- .code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .code = { MEDIA_BUS_FMT_SRGGB12_1X12 },
.pixelformat = V4L2_PIX_FMT_SRGGB12,
.bpp = 2,
.bayer = true,
@@ -182,13 +182,32 @@ const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
return &vimc_pix_map_list[i];
}

+const u32 vimc_mbus_code_by_index(unsigned int index)
+{
+ unsigned int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
+ for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
+ if (!vimc_pix_map_list[i].code[j])
+ break;
+
+ if (!index)
+ return vimc_pix_map_list[i].code[j];
+ index--;
+ }
+ }
+ return 0;
+}
+
const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
{
- unsigned int i;
+ unsigned int i, j;

for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
- if (vimc_pix_map_list[i].code == code)
- return &vimc_pix_map_list[i];
+ for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
+ if (vimc_pix_map_list[i].code[j] == code)
+ return &vimc_pix_map_list[i];
+ }
}
return NULL;
}
diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
index 487bd020f85c..dfebf6f75cfc 100644
--- a/drivers/media/test-drivers/vimc/vimc-common.h
+++ b/drivers/media/test-drivers/vimc/vimc-common.h
@@ -32,6 +32,8 @@
#define VIMC_IS_SRC(pad) (pad)
#define VIMC_IS_SINK(pad) (!(pad))

+#define VIMC_PIX_FMT_MAX_CODES 1
+
/**
* vimc_colorimetry_clamp - Adjust colorimetry parameters
*
@@ -70,7 +72,7 @@ do { \
* V4L2_PIX_FMT_* fourcc pixelformat and its bytes per pixel (bpp)
*/
struct vimc_pix_map {
- unsigned int code;
+ unsigned int code[VIMC_PIX_FMT_MAX_CODES];
unsigned int bpp;
u32 pixelformat;
bool bayer;
@@ -169,6 +171,15 @@ extern struct vimc_ent_type vimc_cap_type;
*/
const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i);

+/**
+ * vimc_mbus_code_by_index - get mbus code by its index
+ *
+ * @index: index of the mbus code in vimc_pix_map_list
+ *
+ * Returns 0 if no mbus code is found for the given index.
+ */
+const u32 vimc_mbus_code_by_index(unsigned int index);
+
/**
* vimc_pix_map_by_code - get vimc_pix_map struct by media bus code
*
diff --git a/drivers/media/test-drivers/vimc/vimc-scaler.c b/drivers/media/test-drivers/vimc/vimc-scaler.c
index 465b906b7497..02615ded1c93 100644
--- a/drivers/media/test-drivers/vimc/vimc-scaler.c
+++ b/drivers/media/test-drivers/vimc/vimc-scaler.c
@@ -110,13 +110,19 @@ static int vimc_sca_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
- const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
+ const u32 mbus_code = vimc_mbus_code_by_index(code->index);
+ const struct vimc_pix_map *vpix;
+
+ if (!mbus_code)
+ return -EINVAL;
+
+ vpix = vimc_pix_map_by_code(mbus_code);

/* We don't support bayer format */
if (!vpix || vpix->bayer)
return -EINVAL;

- code->code = vpix->code;
+ code->code = mbus_code;

return 0;
}
diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
index 228120b3a6dd..9391f5b5c58a 100644
--- a/drivers/media/test-drivers/vimc/vimc-sensor.c
+++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
@@ -52,12 +52,12 @@ static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
- const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
+ const u32 mbus_code = vimc_mbus_code_by_index(code->index);

- if (!vpix)
+ if (!mbus_code)
return -EINVAL;

- code->code = vpix->code;
+ code->code = mbus_code;

return 0;
}
--
2.26.1

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