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charset="utf-8" Add helper function drm_of_dpi_get_color_coding() to get media bus format value from MIPI DPI color coding string. Signed-off-by: Liu Ying --- drivers/gpu/drm/drm_of.c | 43 ++++++++++++++++++++++++++++++++++++++++ include/drm/drm_of.h | 7 +++++++ 2 files changed, 50 insertions(+) diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index d0183dea7703..6e2e19275b99 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -285,6 +285,49 @@ int drm_of_find_panel_or_bridge(const struct device_no= de *np, } EXPORT_SYMBOL_GPL(drm_of_find_panel_or_bridge); =20 +/** + * drm_of_dpi_get_color_coding - Get DPI color coding + * @endpoint: DT endpoint node of the DPI source or sink + * + * Convert DT "dpi-color-coding" property string value into media bus form= at + * value. + * + * Return: + * * MEDIA_BUS_FMT_RGB565_1X16 - dpi-color-coding is "16bit-configuration1" + * * MEDIA_BUS_FMT_RGB565_1X24_CPADHI - dpi-color-coding is + * "16bit-configuration2" + * * MEDIA_BUS_FMT_RGB666_1X18 - dpi-color-coding is "18bit-configuration1" + * * MEDIA_BUS_FMT_BGR666_1X24_CPADHI - dpi-color-coding is + * "18bit-configuration2" + * * MEDIA_BUS_FMT_RGB888_1X24 - dpi-color-coding is "24bit" + * * -EINVAL - the "dpi-color-coding" property is unsupported + * * -ENODEV - the "dpi-color-coding" property is missing + */ +int drm_of_dpi_get_color_coding(const struct device_node *endpoint) +{ + const char *coding; + int ret; + + ret =3D of_property_read_string(endpoint, "dpi-color-coding", &coding); + if (ret < 0) + return -ENODEV; + + /* TODO: Add 16bit-configuration3 support. */ + if (!strcmp(coding, "16bit-configuration1")) + return MEDIA_BUS_FMT_RGB565_1X16; + if (!strcmp(coding, "16bit-configuration2")) + return MEDIA_BUS_FMT_RGB565_1X24_CPADHI; + if (!strcmp(coding, "18bit-configuration1")) + return MEDIA_BUS_FMT_RGB666_1X18; + if (!strcmp(coding, "18bit-configuration2")) + return MEDIA_BUS_FMT_BGR666_1X24_CPADHI; + if (!strcmp(coding, "24bit")) + return MEDIA_BUS_FMT_RGB888_1X24; + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(drm_of_dpi_get_color_coding); + enum drm_of_lvds_pixels { DRM_OF_LVDS_EVEN =3D BIT(0), DRM_OF_LVDS_ODD =3D BIT(1), diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h index 7f0256dae3f1..0a827f3b3a55 100644 --- a/include/drm/drm_of.h +++ b/include/drm/drm_of.h @@ -50,6 +50,7 @@ int drm_of_find_panel_or_bridge(const struct device_node = *np, int port, int endpoint, struct drm_panel **panel, struct drm_bridge **bridge); +int drm_of_dpi_get_color_coding(const struct device_node *endpoint); int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, const struct device_node *port2); int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1, @@ -104,6 +105,12 @@ static inline int drm_of_find_panel_or_bridge(const st= ruct device_node *np, return -EINVAL; } =20 +static inline int +drm_of_dpi_get_color_coding(const struct device_node *endpoint) +{ + return -EINVAL; +} + static inline int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, const struct device_node *port2) --=20 2.34.1