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drivers: mipi_dsi: configure DSI host using pixelformat from panel

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Use the pixelformat information provided by the DSI panel in order
to control the color coding of the DSI host.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
This commit is contained in:
Alain Volmat
2025-11-10 21:33:17 +01:00
committed by Anas Nashif
parent 73ca8c9f76
commit d0c45d981a
1 changed files with 19 additions and 11 deletions
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30
drivers/mipi_dsi/dsi_stm32.c
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@@ -21,16 +21,6 @@
LOG_MODULE_REGISTER(dsi_stm32, CONFIG_MIPI_DSI_LOG_LEVEL);
#if defined(CONFIG_STM32_LTDC_ARGB8888)
#define STM32_DSI_INIT_PIXEL_FORMAT DSI_RGB888
#elif defined(CONFIG_STM32_LTDC_RGB888)
#define STM32_DSI_INIT_PIXEL_FORMAT DSI_RGB888
#elif defined(CONFIG_STM32_LTDC_RGB565)
#define STM32_DSI_INIT_PIXEL_FORMAT DSI_RGB565
#else
#error "Invalid LTDC pixel format chosen"
#endif /* CONFIG_STM32_LTDC_ARGB8888 */
#define MAX_TX_ESC_CLK_KHZ 20000
#define MAX_TX_ESC_CLK_DIV 8
@@ -272,6 +262,21 @@ static int mipi_dsi_stm32_host_init(const struct device *dev)
return 0;
}
static int mipi_dsi_stm32_set_colorcoding(uint32_t pixfmt, uint32_t *colorcoding)
{
switch (pixfmt) {
case MIPI_DSI_PIXFMT_RGB888:
*colorcoding = DSI_RGB888;
break;
case MIPI_DSI_PIXFMT_RGB565:
*colorcoding = DSI_RGB565;
break;
default:
return -EINVAL;
}
return 0;
}
static int mipi_dsi_stm32_attach(const struct device *dev, uint8_t channel,
const struct mipi_dsi_device *mdev)
@@ -287,7 +292,10 @@ static int mipi_dsi_stm32_attach(const struct device *dev, uint8_t channel,
}
vcfg->VirtualChannelID = channel;
vcfg->ColorCoding = STM32_DSI_INIT_PIXEL_FORMAT;
if (mipi_dsi_stm32_set_colorcoding(mdev->pixfmt, &vcfg->ColorCoding) < 0) {
LOG_ERR("MIPI PIXFMT not supported by the DSI host");
return -ENOTSUP;
}
if (mdev->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
vcfg->Mode = DSI_VID_MODE_BURST;