drm/radeon/kms: initial mode validation support
Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -397,6 +397,30 @@ static int radeon_lvds_get_modes(struct drm_connector *connector)
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static int radeon_lvds_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_encoder *encoder = radeon_best_single_encoder(connector);
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if ((mode->hdisplay < 320) || (mode->vdisplay < 240))
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return MODE_PANEL;
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if (encoder) {
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struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
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struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
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/* AVIVO hardware supports downscaling modes larger than the panel
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* to the panel size, but I'm not sure this is desirable.
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*/
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if ((mode->hdisplay > native_mode->hdisplay) ||
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(mode->vdisplay > native_mode->vdisplay))
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return MODE_PANEL;
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/* if scaling is disabled, block non-native modes */
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if (radeon_encoder->rmx_type == RMX_OFF) {
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if ((mode->hdisplay != native_mode->hdisplay) ||
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(mode->vdisplay != native_mode->vdisplay))
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return MODE_PANEL;
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}
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}
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return MODE_OK;
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}
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@ -512,6 +536,8 @@ static int radeon_vga_get_modes(struct drm_connector *connector)
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static int radeon_vga_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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/* XXX check mode bandwidth */
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/* XXX verify against max DAC output frequency */
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return MODE_OK;
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}
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@ -609,6 +635,8 @@ static int radeon_tv_get_modes(struct drm_connector *connector)
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static int radeon_tv_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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if ((mode->hdisplay > 1024) || (mode->vdisplay > 768))
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return MODE_CLOCK_RANGE;
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return MODE_OK;
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}
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@ -801,9 +829,27 @@ static void radeon_dvi_force(struct drm_connector *connector)
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radeon_connector->use_digital = true;
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}
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static int radeon_dvi_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct radeon_connector *radeon_connector = to_radeon_connector(connector);
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/* XXX check mode bandwidth */
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if (radeon_connector->use_digital && (mode->clock > 165000)) {
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if ((radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_I) ||
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(radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_D) ||
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(radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_B))
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return MODE_OK;
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else
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return MODE_CLOCK_HIGH;
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}
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return MODE_OK;
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}
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struct drm_connector_helper_funcs radeon_dvi_connector_helper_funcs = {
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.get_modes = radeon_dvi_get_modes,
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.mode_valid = radeon_vga_mode_valid,
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.mode_valid = radeon_dvi_mode_valid,
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.best_encoder = radeon_dvi_encoder,
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};
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