drivers: mipi-dbi: add color format in mipi-dbi-device.yaml

[ck-telecom]

Summary

some mipi-dbi devices which offer both spi and 8080 interface need color format for hardware interface settings, I try to search and find some drivers such as zephyr/drivers/mipi-dbi/mipi_dbi_nxp_dcnano_lcdif.c,

static int mcux_dcnano_lcdif_dbi_configure(const struct device *dev,
					   const struct mipi_dbi_config *dbi_config)
{
	const struct mcux_dcnano_lcdif_dbi_config *config = dev->config;
	struct mcux_dcnano_lcdif_dbi_data *lcdif_data = dev->data;
	uint8_t bus_type = dbi_config->mode & 0xFU;
	uint8_t color_coding = dbi_config->mode & 0xF0U;

where color_coding from dbi_config->mode & 0xF0, but how to initialized, it is impossible in display driver coz MIPI_DBI_CONFIG_DT_INST only get upper string

Describe the solution you'd like

Adding mipi-color-format in mipi-dbi-device.yaml, so that mipi-dbi driver can get property from struct mipi_dbi_config

Alternatives

No response

Additional Context

No response

[JarmouniA]

where color_coding from dbi_config->mode & 0xF0, but how to initialized, it is impossible in display driver coz MIPI_DBI_CONFIG_DT_INST only get upper string

Yes, mipi-dbi mode is not supposed to be configurable in the display driver, the mode is set in mipi_dbi device node in DT, valid values are listed here

zephyr/dts/bindings/mipi-dbi/mipi-dbi-device.yaml

Line 20 in 0f5e03f

enum:

Adding mipi-color-format in mipi-dbi-device.yaml, so that mipi-dbi driver can get property from struct mipi_dbi_config

The custom mipi dbi device could just define a property for it in its binding. It is already the case for most mipi dbi devices, for ex.

zephyr/dts/bindings/display/sitronix,st7789v.yaml

Line 54 in 0f5e03f

colmod: