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| author | Marek Vasut <marex@denx.de> | 2021-10-13 00:42:52 +0200 |
|---|---|---|
| committer | Sam Ravnborg <sam@ravnborg.org> | 2021-10-14 20:47:30 +0200 |
| commit | 7c4dd0a266527ffa7ed8d424facaba171618820a (patch) | |
| tree | c12fa3ec031bcb52f54d0a39cb0755cb7cd6c742 /drivers/gpu/drm/drm_of.c | |
| parent | drm/bridge: display-connector: fix an uninitialized pointer in probe() (diff) | |
| download | linux-7c4dd0a266527ffa7ed8d424facaba171618820a.tar.xz linux-7c4dd0a266527ffa7ed8d424facaba171618820a.zip | |
drm: of: Add drm_of_lvds_get_data_mapping
Add helper function to convert DT "data-mapping" property string value
into media bus format value, and deduplicate the code in panel-lvds.c
and lvds-codec.c .
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211012224252.29185-1-marex@denx.de
Diffstat (limited to 'drivers/gpu/drm/drm_of.c')
| -rw-r--r-- | drivers/gpu/drm/drm_of.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 37c34146eea8..59d368ea006b 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -402,3 +402,36 @@ int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; } EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); + +/** + * drm_of_lvds_get_data_mapping - Get LVDS data mapping + * @port: DT port node of the LVDS source or sink + * + * Convert DT "data-mapping" property string value into media bus format value. + * + * Return: + * * MEDIA_BUS_FMT_RGB666_1X7X3_SPWG - data-mapping is "jeida-18" + * * MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA - data-mapping is "jeida-24" + * * MEDIA_BUS_FMT_RGB888_1X7X4_SPWG - data-mapping is "vesa-24" + * * -EINVAL - the "data-mapping" property is unsupported + * * -ENODEV - the "data-mapping" property is missing + */ +int drm_of_lvds_get_data_mapping(const struct device_node *port) +{ + const char *mapping; + int ret; + + ret = of_property_read_string(port, "data-mapping", &mapping); + if (ret < 0) + return -ENODEV; + + if (!strcmp(mapping, "jeida-18")) + return MEDIA_BUS_FMT_RGB666_1X7X3_SPWG; + if (!strcmp(mapping, "jeida-24")) + return MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA; + if (!strcmp(mapping, "vesa-24")) + return MEDIA_BUS_FMT_RGB888_1X7X4_SPWG; + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(drm_of_lvds_get_data_mapping); |