Hi Shashank, On 07-04-2017 17:39, Shashank Sharma wrote: > HDMI displays can support various output types, based on > the color space and subsampling type. The possible > outputs from a HDMI 2.0 monitor could be: > - RGB > - YCBCR 444 > - YCBCR 422 > - YCBCR 420 > > This patch adds a drm property, using which, a userspace > can specify its preference, for the HDMI output type. > The output type enums are similar to the mentioned outputs > above. To handle various subsampling of YCBCR output types, > this property allows two special cases: > - DRM_HDMI_OUTPUT_YCBCR_HQ > This indicates preferred output should be YCBCR output, with highest > subsampling rate by the source/sink, which can be typically: > - ycbcr444 > - ycbcr422 > - ycbcr420 > - DRM_HDMI_OUTPUT_YCBCR_LQ > This indicates preferred output should be YCBCR output, with lowest > subsampling rate supported by source/sink, which can be: > - ycbcr420 > - ycbcr422 > - ycbcr444 > > Default value of the property is set to 0 = RGB, so no changes if you > dont set the property. The HQ/LQ properties are a nice idea but where are you parsing them (because in patch 07/11 you reject these properties)? Also, you need to make sure that source and sink supports the color space. Best regards, Jose Miguel Abreu > > Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> > Cc: Jose Abreu <joabreu@xxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx> > Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx> > --- > drivers/gpu/drm/drm_atomic.c | 2 ++ > drivers/gpu/drm/drm_atomic_helper.c | 4 ++++ > drivers/gpu/drm/drm_connector.c | 31 +++++++++++++++++++++++++++++++ > include/drm/drm_connector.h | 14 ++++++++++++++ > include/drm/drm_mode_config.h | 5 +++++ > 5 files changed, 56 insertions(+) > > diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c > index f32506a..6ef34dc 100644 > --- a/drivers/gpu/drm/drm_atomic.c > +++ b/drivers/gpu/drm/drm_atomic.c > @@ -1123,6 +1123,8 @@ int drm_atomic_connector_set_property(struct drm_connector *connector, > */ > if (state->link_status != DRM_LINK_STATUS_GOOD) > state->link_status = val; > + } else if (property == config->hdmi_output_property) { > + state->hdmi_output = val; > } else if (connector->funcs->atomic_set_property) { > return connector->funcs->atomic_set_property(connector, > state, property, val); > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index 8be9719..fcba3c0 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -567,6 +567,10 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, > if (old_connector_state->link_status != > new_connector_state->link_status) > new_crtc_state->connectors_changed = true; > + > + if (old_connector_state->hdmi_output != > + new_connector_state->hdmi_output) > + new_crtc_state->connectors_changed = true; > } > > if (funcs->atomic_check) > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c > index 9f84761..10201b1 100644 > --- a/drivers/gpu/drm/drm_connector.c > +++ b/drivers/gpu/drm/drm_connector.c > @@ -227,6 +227,11 @@ int drm_connector_init(struct drm_device *dev, > config->edid_property, > 0); > > + if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) > + drm_object_attach_property(&connector->base, > + config->hdmi_output_property, > + 0); > + > drm_object_attach_property(&connector->base, > config->dpms_property, 0); > > @@ -617,6 +622,25 @@ static const struct drm_prop_enum_list drm_link_status_enum_list[] = { > }; > DRM_ENUM_NAME_FN(drm_get_link_status_name, drm_link_status_enum_list) > > +static const struct drm_prop_enum_list drm_hdmi_output_enum_list[] = { > + { DRM_HDMI_OUTPUT_DEFAULT_RGB, "output_rgb" }, > + { DRM_HDMI_OUTPUT_YCBCR422, "output_ycbcr422" }, > + { DRM_HDMI_OUTPUT_YCBCR444, "output_ycbcr444" }, > + { DRM_HDMI_OUTPUT_YCBCR420, "output_ycbcr420" }, > + { DRM_HDMI_OUTPUT_YCBCR_HQ, "output_ycbcr_high_subsampling" }, > + { DRM_HDMI_OUTPUT_YCBCR_LQ, "output_ycbcr_low_subsampling" }, > +}; > + > +/** > + * drm_get_hdmi_output_name - return a string for a given hdmi output enum > + * @type: enum of output type > + */ > +const char *drm_get_hdmi_output_name(enum drm_hdmi_output_type type) > +{ > + return drm_hdmi_output_enum_list[type].name; > +} > +EXPORT_SYMBOL(drm_get_hdmi_output_name); > + > /** > * drm_display_info_set_bus_formats - set the supported bus formats > * @info: display info to store bus formats in > @@ -789,6 +813,13 @@ int drm_connector_create_standard_properties(struct drm_device *dev) > return -ENOMEM; > dev->mode_config.link_status_property = prop; > > + prop = drm_property_create_enum(dev, 0, "hdmi_output_format", > + drm_hdmi_output_enum_list, > + ARRAY_SIZE(drm_hdmi_output_enum_list)); > + if (!prop) > + return -ENOMEM; > + dev->mode_config.hdmi_output_property = prop; > + > return 0; > } > > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h > index 4545c6e..e872a88 100644 > --- a/include/drm/drm_connector.h > +++ b/include/drm/drm_connector.h > @@ -300,6 +300,17 @@ struct drm_tv_connector_state { > unsigned int hue; > }; > > +/* HDMI output pixel format */ > +enum drm_hdmi_output_type { > + DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */ > + DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */ > + DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */ > + DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */ > + DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */ > + DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */ > + DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */ > +}; > + > /** > * struct drm_connector_state - mutable connector state > * @connector: backpointer to the connector > @@ -329,6 +340,8 @@ struct drm_connector_state { > struct drm_atomic_state *state; > > struct drm_tv_connector_state tv; > + > + enum drm_hdmi_output_type hdmi_output; > }; > > /** > @@ -945,6 +958,7 @@ static inline void drm_connector_unreference(struct drm_connector *connector) > > const char *drm_get_connector_status_name(enum drm_connector_status status); > const char *drm_get_subpixel_order_name(enum subpixel_order order); > +const char *drm_get_hdmi_output_name(enum drm_hdmi_output_type type); > const char *drm_get_dpms_name(int val); > const char *drm_get_dvi_i_subconnector_name(int val); > const char *drm_get_dvi_i_select_name(int val); > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > index 4298171..1887261 100644 > --- a/include/drm/drm_mode_config.h > +++ b/include/drm/drm_mode_config.h > @@ -740,6 +740,11 @@ struct drm_mode_config { > * the position of the output on the host's screen. > */ > struct drm_property *suggested_y_property; > + /** > + * @hdmi_output_property: output pixel format from HDMI display > + * Default is set for RGB > + */ > + struct drm_property *hdmi_output_property; > > /* dumb ioctl parameters */ > uint32_t preferred_depth, prefer_shadow; _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx