Add the atomic_get_output_bus_fmts, atomic_get_input_bus_fmts to negociate
the possible output and input formats for the current mode and monitor,
and use the negociated formats in a basic atomic_check callback.
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 245 +++++++++++++++++++++-
1 file changed, 241 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index bd65d0479683..00aacad51e29 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1987,11 +1987,10 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
- /* TOFIX: Get input format from plat data or fallback to RGB888 */
if (hdmi->plat_data->input_bus_format)
hdmi->hdmi_data.enc_in_bus_format =
hdmi->plat_data->input_bus_format;
- else
+ else if (hdmi->hdmi_data.enc_in_bus_format == MEDIA_BUS_FMT_FIXED)
hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
/* TOFIX: Get input encoding from plat data or fallback to none */
@@ -2001,8 +2000,8 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
else
hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
- /* TOFIX: Default to RGB888 output format */
- hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ if (hdmi->hdmi_data.enc_out_bus_format == MEDIA_BUS_FMT_FIXED)
+ hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
hdmi->hdmi_data.pix_repet_factor = 0;
hdmi->hdmi_data.hdcp_enable = 0;
@@ -2227,6 +2226,240 @@ static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs =
.get_modes = dw_hdmi_connector_get_modes,
};
+static void 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,
+ u32 *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;
+ bool is_hdmi2_sink = info->hdmi.scdc.supported;
+ int i = 0;
+
+ /*
+ * 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 (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 (info->bpc == 16 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48)) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYYVYY16_0_5X48;
+ ++i;
+ }
+
+ if (info->bpc >= 12 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36)) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYYVYY12_0_5X36;
+ ++i;
+ }
+
+ if (info->bpc >= 10 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30)) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
+ ++i;
+ }
+
+ /* Default 8bit fallback */
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
+ ++i;
+
+ *num_output_fmts = i;
+
+ return;
+ }
+
+ /*
+ * Order bus formats from 16bit to 8bit and from YUV422 to RGB
+ * if supported. In any case the default RGB888 format is added
+ */
+
+ if (info->bpc == 16) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_YUV16_1X48;
+ ++i;
+ }
+
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_RGB161616_1X48;
+ ++i;
+ }
+
+ if (info->bpc >= 12) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYVY12_1X24;
+ ++i;
+ }
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_YUV12_1X36;
+ ++i;
+ }
+
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_RGB121212_1X36;
+ ++i;
+ }
+
+ if (info->bpc >= 10) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYVY10_1X20;
+ ++i;
+ }
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_YUV10_1X30;
+ ++i;
+ }
+
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_RGB101010_1X30;
+ ++i;
+ }
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_UYVY8_1X16;
+ ++i;
+ }
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) {
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_YUV8_1X24;
+ ++i;
+ }
+
+ /* Default 8bit RGB fallback */
+ if (output_fmts)
+ output_fmts[i] = MEDIA_BUS_FMT_RGB888_1X24;
+ ++i;
+
+ *num_output_fmts = i;
+}
+
+static void dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts,
+ u32 *input_fmts)
+{
+ int i = 0;
+
+ switch (output_fmt) {
+ /* 8bit */
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ if (input_fmts)
+ input_fmts[i] = MEDIA_BUS_FMT_RGB888_1X24;
+ ++i;
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ if (input_fmts)
+ input_fmts[i] = MEDIA_BUS_FMT_YUV8_1X24;
+ ++i;
+ break;
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ break;
+
+ /* 10bit */
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ if (input_fmts)
+ input_fmts[i] = MEDIA_BUS_FMT_YUV10_1X30;
+ ++i;
+ break;
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ break;
+
+ /* 12bit */
+ case MEDIA_BUS_FMT_RGB121212_1X36:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_YUV12_1X36:
+ if (input_fmts)
+ input_fmts[i] = MEDIA_BUS_FMT_YUV12_1X36;
+ ++i;
+ break;
+ case MEDIA_BUS_FMT_UYVY12_1X24:
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ break;
+
+ /* 16bit */
+ case MEDIA_BUS_FMT_RGB161616_1X48:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ /* Fallthrought */
+ case MEDIA_BUS_FMT_YUV16_1X48:
+ if (input_fmts)
+ input_fmts[i] = MEDIA_BUS_FMT_YUV16_1X48;
+ ++i;
+ break;
+ case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+ if (input_fmts)
+ input_fmts[i] = output_fmt;
+ ++i;
+ break;
+ }
+
+ *num_input_fmts = i;
+}
+
+static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ dev_dbg(hdmi->dev, "selected output format %x\n",
+ bridge_state->output_bus_cfg.fmt);
+
+ hdmi->hdmi_data.enc_out_bus_format = bridge_state->output_bus_cfg.fmt;
+
+ dev_dbg(hdmi->dev, "selected input format %x\n",
+ bridge_state->input_bus_cfg.fmt);
+
+ hdmi->hdmi_data.enc_in_bus_format = bridge_state->input_bus_cfg.fmt;
+
+ return 0;
+}
+
static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
{
struct dw_hdmi *hdmi = bridge->driver_private;
@@ -2327,6 +2560,9 @@ static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
.attach = dw_hdmi_bridge_attach,
.detach = dw_hdmi_bridge_detach,
+ .atomic_check = dw_hdmi_bridge_atomic_check,
+ .atomic_get_output_bus_fmts = dw_hdmi_bridge_atomic_get_output_bus_fmts,
+ .atomic_get_input_bus_fmts = dw_hdmi_bridge_atomic_get_input_bus_fmts,
.enable = dw_hdmi_bridge_enable,
.disable = dw_hdmi_bridge_disable,
.mode_set = dw_hdmi_bridge_mode_set,
@@ -2790,6 +3026,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
hdmi->bridge.driver_private = hdmi;
hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
+
#ifdef CONFIG_OF
hdmi->bridge.of_node = pdev->dev.of_node;
#endif
--
2.22.0
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