The atomic_get_output_bus_fmts bridge callback is there to list the available formats for output by decreasing order of preference.
On HDMI controllers, we have a fairly static list that will depend on what the HDMI sink is capable of and the BPC our controller can output.
The dw-hdmi driver already has that code done in a fairly generic manner, so let's turn that code into an helper for all the HDMI controllers to reuse.
Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 127 ---------------------- drivers/gpu/drm/drm_bridge.c | 118 ++++++++++++++++++++ include/drm/drm_bridge.h | 6 + 3 files changed, 124 insertions(+), 127 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index dda4fa9a1a08..d010c9c525d9 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -2514,133 +2514,6 @@ static int dw_hdmi_connector_create(struct dw_hdmi *hdmi) * DRM Bridge Operations */
-/* - * Possible output formats : - * - MEDIA_BUS_FMT_UYYVYY16_0_5X48, - * - MEDIA_BUS_FMT_UYYVYY12_0_5X36, - * - MEDIA_BUS_FMT_UYYVYY10_0_5X30, - * - MEDIA_BUS_FMT_UYYVYY8_0_5X24, - * - MEDIA_BUS_FMT_YUV16_1X48, - * - MEDIA_BUS_FMT_RGB161616_1X48, - * - MEDIA_BUS_FMT_UYVY12_1X24, - * - MEDIA_BUS_FMT_YUV12_1X36, - * - MEDIA_BUS_FMT_RGB121212_1X36, - * - MEDIA_BUS_FMT_UYVY10_1X20, - * - MEDIA_BUS_FMT_YUV10_1X30, - * - MEDIA_BUS_FMT_RGB101010_1X30, - * - MEDIA_BUS_FMT_UYVY8_1X16, - * - MEDIA_BUS_FMT_YUV8_1X24, - * - MEDIA_BUS_FMT_RGB888_1X24, - */ - -/* Can return a maximum of 11 possible output formats for a mode/connector */ -#define MAX_OUTPUT_SEL_FORMATS 11 - -static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge, - struct drm_bridge_state *bridge_state, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state, - unsigned int *num_output_fmts) -{ - struct drm_connector *conn = conn_state->connector; - struct drm_display_info *info = &conn->display_info; - struct drm_display_mode *mode = &crtc_state->mode; - u8 max_bpc = conn_state->max_requested_bpc; - bool is_hdmi2_sink = info->hdmi.scdc.supported || - (info->color_formats & DRM_COLOR_FORMAT_YCRCB420); - u32 *output_fmts; - unsigned int i = 0; - - *num_output_fmts = 0; - - output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts), - GFP_KERNEL); - if (!output_fmts) - return NULL; - - /* If dw-hdmi is the only bridge, avoid negociating with ourselves */ - if (list_is_singular(&bridge->encoder->bridge_chain)) { - *num_output_fmts = 1; - output_fmts[0] = MEDIA_BUS_FMT_FIXED; - - return output_fmts; - } - - /* - * If the current mode enforces 4:2:0, force the output but format - * to 4:2:0 and do not add the YUV422/444/RGB formats - */ - if (conn->ycbcr_420_allowed && - (drm_mode_is_420_only(info, mode) || - (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) { - - /* Order bus formats from 16bit to 8bit if supported */ - if (max_bpc >= 16 && info->bpc == 16 && - (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48)) - output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY16_0_5X48; - - if (max_bpc >= 12 && info->bpc >= 12 && - (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36)) - output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36; - - if (max_bpc >= 10 && info->bpc >= 10 && - (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30)) - output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30; - - /* Default 8bit fallback */ - output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24; - - *num_output_fmts = i; - - return output_fmts; - } - - /* - * Order bus formats from 16bit to 8bit and from YUV422 to RGB - * if supported. In any case the default RGB888 format is added - */ - - if (max_bpc >= 16 && info->bpc == 16) { - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) - output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; - - output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; - } - - if (max_bpc >= 12 && info->bpc >= 12) { - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) - output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; - - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) - output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; - - output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; - } - - if (max_bpc >= 10 && info->bpc >= 10) { - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) - output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; - - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) - output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; - - output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; - } - - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) - output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; - - if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) - output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; - - /* Default 8bit RGB fallback */ - output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; - - *num_output_fmts = i; - - return output_fmts; -} - /* * Possible input formats : * - MEDIA_BUS_FMT_RGB888_1X24 diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 64f0effb52ac..253cbca1c19e 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -1035,6 +1035,124 @@ int drm_atomic_bridge_chain_check(struct drm_bridge *bridge, } EXPORT_SYMBOL(drm_atomic_bridge_chain_check);
+/* Can return a maximum of 11 possible output formats for a mode/connector */ +#define MAX_OUTPUT_SEL_FORMATS 11 + +/** + * drm_bridge_helper_hdmi_atomic_get_output_bus_fmts() - Lists the output formats for an HDMI sink + * @bridge: bridge control structure + * @bridge_state: bridge state + * @crtc_state: CRTC state + * @conn_state: connector state + * @num_output_fmts: number of formats returned + * + * Returns the supported bus formats on the output end of an HDMI + * bridge. The returned array is allocated with kmalloc and will thus + * need to be freed. Formats will be listed in decreasing preference + * order, the framework eventually picking the highest preference + * available across all the bridges. + * + * RETURNS: + * an array of MEDIA_FMT_* on success, NULL on failure + */ +u32 *drm_atomic_helper_bridge_hdmi_get_output_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + unsigned int *num_output_fmts) +{ + struct drm_connector *conn = conn_state->connector; + struct drm_display_info *info = &conn->display_info; + struct drm_display_mode *mode = &crtc_state->mode; + u8 max_bpc = conn_state->max_requested_bpc; + bool is_hdmi2_sink = info->hdmi.scdc.supported || + (info->color_formats & DRM_COLOR_FORMAT_YCRCB420); + u32 *output_fmts; + unsigned int i = 0; + + *num_output_fmts = 0; + + output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts), + GFP_KERNEL); + if (!output_fmts) + return NULL; + + /* + * If the current mode enforces 4:2:0, force the output but format + * to 4:2:0 and do not add the YUV422/444/RGB formats + */ + if (conn->ycbcr_420_allowed && + (drm_mode_is_420_only(info, mode) || + (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) { + + /* Order bus formats from 16bit to 8bit if supported */ + if (max_bpc >= 16 && info->bpc == 16 && + (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48)) + output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY16_0_5X48; + + if (max_bpc >= 12 && info->bpc >= 12 && + (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36)) + output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36; + + if (max_bpc >= 10 && info->bpc >= 10 && + (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30)) + output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30; + + /* Default 8bit fallback */ + output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24; + + *num_output_fmts = i; + + return output_fmts; + } + + /* + * Order bus formats from 16bit to 8bit and from YUV422 to RGB + * if supported. In any case the default RGB888 format is added + */ + + if (max_bpc >= 16 && info->bpc == 16) { + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) + output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; + + output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; + } + + if (max_bpc >= 12 && info->bpc >= 12) { + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) + output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; + + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) + output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; + + output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; + } + + if (max_bpc >= 10 && info->bpc >= 10) { + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) + output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; + + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) + output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; + + output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; + } + + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) + output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; + + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) + output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; + + /* Default 8bit RGB fallback */ + output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; + + *num_output_fmts = i; + + return output_fmts; +} +EXPORT_SYMBOL_GPL(drm_atomic_helper_bridge_hdmi_get_output_bus_fmts); + /** * drm_bridge_detect - check if anything is attached to the bridge output * @bridge: bridge control structure diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 2195daa289d2..1d801d77e90a 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -868,6 +868,12 @@ drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, u32 output_fmt, unsigned int *num_input_fmts);
+u32 *drm_atomic_helper_bridge_hdmi_get_output_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + unsigned int *num_output_fmts); + enum drm_connector_status drm_bridge_detect(struct drm_bridge *bridge); int drm_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector);