drm/radeon/kms: parse the extended LCD info block
This block may contain various additional LCD info such as physical size and a stored EDID. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -1515,6 +1515,59 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
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else
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lvds->linkb = false;
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/* parse the lcd record table */
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if (lvds_info->info.usModePatchTableOffset) {
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ATOM_FAKE_EDID_PATCH_RECORD *fake_edid_record;
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ATOM_PANEL_RESOLUTION_PATCH_RECORD *panel_res_record;
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bool bad_record = false;
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u8 *record = (u8 *)(mode_info->atom_context->bios +
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data_offset +
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lvds_info->info.usModePatchTableOffset);
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while (*record != ATOM_RECORD_END_TYPE) {
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switch (*record) {
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case LCD_MODE_PATCH_RECORD_MODE_TYPE:
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record += sizeof(ATOM_PATCH_RECORD_MODE);
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break;
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case LCD_RTS_RECORD_TYPE:
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record += sizeof(ATOM_LCD_RTS_RECORD);
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break;
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case LCD_CAP_RECORD_TYPE:
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record += sizeof(ATOM_LCD_MODE_CONTROL_CAP);
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break;
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case LCD_FAKE_EDID_PATCH_RECORD_TYPE:
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fake_edid_record = (ATOM_FAKE_EDID_PATCH_RECORD *)record;
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if (fake_edid_record->ucFakeEDIDLength) {
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struct edid *edid;
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int edid_size =
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max((int)EDID_LENGTH, (int)fake_edid_record->ucFakeEDIDLength);
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edid = kmalloc(edid_size, GFP_KERNEL);
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if (edid) {
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memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0],
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fake_edid_record->ucFakeEDIDLength);
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if (drm_edid_is_valid(edid))
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rdev->mode_info.bios_hardcoded_edid = edid;
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else
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kfree(edid);
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}
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}
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record += sizeof(ATOM_FAKE_EDID_PATCH_RECORD);
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break;
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case LCD_PANEL_RESOLUTION_RECORD_TYPE:
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panel_res_record = (ATOM_PANEL_RESOLUTION_PATCH_RECORD *)record;
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lvds->native_mode.width_mm = panel_res_record->usHSize;
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lvds->native_mode.height_mm = panel_res_record->usVSize;
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record += sizeof(ATOM_PANEL_RESOLUTION_PATCH_RECORD);
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break;
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default:
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DRM_ERROR("Bad LCD record %d\n", *record);
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bad_record = true;
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break;
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}
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if (bad_record)
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break;
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}
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}
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}
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return lvds;
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}
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@ -471,8 +471,9 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
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return true;
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}
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/* this is used for atom LCDs as well */
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struct edid *
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radeon_combios_get_hardcoded_edid(struct radeon_device *rdev)
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radeon_bios_get_hardcoded_edid(struct radeon_device *rdev)
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{
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if (rdev->mode_info.bios_hardcoded_edid)
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return rdev->mode_info.bios_hardcoded_edid;
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@ -679,9 +679,17 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
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if (!radeon_connector->edid) {
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radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
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}
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/* some servers provide a hardcoded edid in rom for KVMs */
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if (!radeon_connector->edid)
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radeon_connector->edid = radeon_combios_get_hardcoded_edid(rdev);
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if (!radeon_connector->edid) {
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if (rdev->is_atom_bios) {
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/* some laptops provide a hardcoded edid in rom for LCDs */
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if (((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_LVDS) ||
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(radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)))
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radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
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} else
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/* some servers provide a hardcoded edid in rom for KVMs */
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radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
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}
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if (radeon_connector->edid) {
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drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
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ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
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@ -566,7 +566,7 @@ extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
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extern bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev);
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extern struct edid *
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radeon_combios_get_hardcoded_edid(struct radeon_device *rdev);
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radeon_bios_get_hardcoded_edid(struct radeon_device *rdev);
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extern bool radeon_atom_get_clock_info(struct drm_device *dev);
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extern bool radeon_combios_get_clock_info(struct drm_device *dev);
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extern struct radeon_encoder_atom_dig *
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