diff options
Diffstat (limited to 'drivers/gpu/drm/drm_of.c')
| -rw-r--r-- | drivers/gpu/drm/drm_of.c | 82 |
1 files changed, 71 insertions, 11 deletions
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 177b600895d3..5c2abc9eca9c 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -341,8 +341,23 @@ static int drm_of_lvds_get_remote_pixels_type( return pixels_type; } +static int __drm_of_lvds_get_dual_link_pixel_order(int p1_pt, int p2_pt) +{ + /* + * A valid dual-lVDS bus is found when one port is marked with + * "dual-lvds-even-pixels", and the other port is marked with + * "dual-lvds-odd-pixels", bail out if the markers are not right. + */ + if (p1_pt + p2_pt != DRM_OF_LVDS_EVEN + DRM_OF_LVDS_ODD) + return -EINVAL; + + return p1_pt == DRM_OF_LVDS_EVEN ? + DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS : + DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; +} + /** - * drm_of_lvds_get_dual_link_pixel_order - Get LVDS dual-link pixel order + * drm_of_lvds_get_dual_link_pixel_order - Get LVDS dual-link source pixel order * @port1: First DT port node of the Dual-link LVDS source * @port2: Second DT port node of the Dual-link LVDS source * @@ -387,19 +402,58 @@ int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, if (remote_p2_pt < 0) return remote_p2_pt; - /* - * A valid dual-lVDS bus is found when one remote port is marked with - * "dual-lvds-even-pixels", and the other remote port is marked with - * "dual-lvds-odd-pixels", bail out if the markers are not right. - */ - if (remote_p1_pt + remote_p2_pt != DRM_OF_LVDS_EVEN + DRM_OF_LVDS_ODD) + return __drm_of_lvds_get_dual_link_pixel_order(remote_p1_pt, remote_p2_pt); +} +EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); + +/** + * drm_of_lvds_get_dual_link_pixel_order_sink - Get LVDS dual-link sink pixel order + * @port1: First DT port node of the Dual-link LVDS sink + * @port2: Second DT port node of the Dual-link LVDS sink + * + * An LVDS dual-link connection is made of two links, with even pixels + * transitting on one link, and odd pixels on the other link. This function + * returns, for two ports of an LVDS dual-link sink, which port shall transmit + * the even and odd pixels, based on the requirements of the sink. + * + * The pixel order is determined from the dual-lvds-even-pixels and + * dual-lvds-odd-pixels properties in the sink's DT port nodes. If those + * properties are not present, or if their usage is not valid, this function + * returns -EINVAL. + * + * If either port is not connected, this function returns -EPIPE. + * + * @port1 and @port2 are typically DT sibling nodes, but may have different + * parents when, for instance, two separate LVDS decoders receive the even and + * odd pixels. + * + * Return: + * * DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS - @port1 receives even pixels and @port2 + * receives odd pixels + * * DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS - @port1 receives odd pixels and @port2 + * receives even pixels + * * -EINVAL - @port1 or @port2 are NULL + * * -EPIPE - when @port1 or @port2 are not connected + */ +int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1, + struct device_node *port2) +{ + int sink_p1_pt, sink_p2_pt; + + if (!port1 || !port2) return -EINVAL; - return remote_p1_pt == DRM_OF_LVDS_EVEN ? - DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS : - DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; + sink_p1_pt = drm_of_lvds_get_port_pixels_type(port1); + if (!sink_p1_pt) + return -EPIPE; + + sink_p2_pt = drm_of_lvds_get_port_pixels_type(port2); + if (!sink_p2_pt) + return -EPIPE; + + return __drm_of_lvds_get_dual_link_pixel_order(sink_p1_pt, sink_p2_pt); } -EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); +EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order_sink); /** * drm_of_lvds_get_data_mapping - Get LVDS data mapping @@ -410,7 +464,9 @@ EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); * 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_RGB101010_1X7X5_JEIDA - data-mapping is "jeida-30" * * MEDIA_BUS_FMT_RGB888_1X7X4_SPWG - data-mapping is "vesa-24" + * * MEDIA_BUS_FMT_RGB101010_1X7X5_SPWG - data-mapping is "vesa-30" * * -EINVAL - the "data-mapping" property is unsupported * * -ENODEV - the "data-mapping" property is missing */ @@ -427,8 +483,12 @@ int drm_of_lvds_get_data_mapping(const struct device_node *port) return MEDIA_BUS_FMT_RGB666_1X7X3_SPWG; if (!strcmp(mapping, "jeida-24")) return MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA; + if (!strcmp(mapping, "jeida-30")) + return MEDIA_BUS_FMT_RGB101010_1X7X5_JEIDA; if (!strcmp(mapping, "vesa-24")) return MEDIA_BUS_FMT_RGB888_1X7X4_SPWG; + if (!strcmp(mapping, "vesa-30")) + return MEDIA_BUS_FMT_RGB101010_1X7X5_SPWG; return -EINVAL; } |