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video/gc0308: report V4L2_PIX_FMT_RGB565X for 8-bit DVP output

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GC0308 register 0x24 bits[3:0] = 0x06 selects RGB565 output per
datasheet.  On an 8-bit DVP bus the high byte is clocked out first,
so the pixel data arrives in memory in big-endian order (RGB565X).

Report V4L2_PIX_FMT_RGB565X so that userspace can detect this and
byte-swap if needed for a little-endian display path.

Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
This commit is contained in:
wangjianyu3
2026-04-07 11:57:15 +08:00
committed by simbit18
parent 60ae1681a2
commit e6ad9d25d7
1 changed files with 10 additions and 7 deletions
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drivers/video/gc0308.c
+10 -7
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@@ -461,8 +461,8 @@ static const struct v4l2_fmtdesc g_gc0308_fmtdescs[] =
.description = "YUV 4:2:2 (YUYV)",
},
{
.pixelformat = V4L2_PIX_FMT_RGB565,
.description = "RGB565",
.pixelformat = V4L2_PIX_FMT_RGB565X,
.description = "RGB565X (BE)",
},
};
@@ -653,7 +653,10 @@ static int gc0308_init(struct imgsensor_s *sensor)
up_mdelay(80);
/* Set default RGB565 output format: reg 0x24 bits[3:0] = 6 */
/* Set RGB565 output: reg 0x24 bits[3:0] = 0x06 per datasheet.
* On 8-bit DVP bus the high byte is clocked out first, so the
* resulting memory layout is big-endian (RGB565X).
*/
ret = gc0308_putreg(priv->i2c, GC0308_REG_RESET, 0x00);
if (ret < 0)
@@ -662,7 +665,7 @@ static int gc0308_init(struct imgsensor_s *sensor)
}
ret = gc0308_modreg(priv->i2c, GC0308_REG_OUTPUT_FMT, 0x0f, 0x06);
priv->pixelformat = IMGSENSOR_PIX_FMT_RGB565;
priv->pixelformat = IMGSENSOR_PIX_FMT_RGB565X;
if (ret < 0)
{
return ret;
@@ -760,7 +763,7 @@ static int gc0308_validate_frame_setting(struct imgsensor_s *sensor,
if (datafmts[IMGSENSOR_FMT_MAIN].pixelformat !=
IMGSENSOR_PIX_FMT_YUYV &&
datafmts[IMGSENSOR_FMT_MAIN].pixelformat !=
IMGSENSOR_PIX_FMT_RGB565)
IMGSENSOR_PIX_FMT_RGB565X)
{
return -EINVAL;
}
@@ -795,9 +798,9 @@ static int gc0308_start_capture(struct imgsensor_s *sensor,
/* Configure output format register based on requested pixel format */
if (datafmts[IMGSENSOR_FMT_MAIN].pixelformat == IMGSENSOR_PIX_FMT_RGB565)
if (datafmts[IMGSENSOR_FMT_MAIN].pixelformat == IMGSENSOR_PIX_FMT_RGB565X)
{
fmtval = 0x06; /* RGB565 */
fmtval = 0x06; /* Reg 0x24 = RGB565; BE in memory due to 8-bit DVP */
}
else
{