diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_atombios.c')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_atombios.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 35c5ff09040d..d6c611eee204 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -1515,6 +1515,59 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct else lvds->linkb = false; + /* parse the lcd record table */ + if (lvds_info->info.usModePatchTableOffset) { + ATOM_FAKE_EDID_PATCH_RECORD *fake_edid_record; + ATOM_PANEL_RESOLUTION_PATCH_RECORD *panel_res_record; + bool bad_record = false; + u8 *record = (u8 *)(mode_info->atom_context->bios + + data_offset + + lvds_info->info.usModePatchTableOffset); + while (*record != ATOM_RECORD_END_TYPE) { + switch (*record) { + case LCD_MODE_PATCH_RECORD_MODE_TYPE: + record += sizeof(ATOM_PATCH_RECORD_MODE); + break; + case LCD_RTS_RECORD_TYPE: + record += sizeof(ATOM_LCD_RTS_RECORD); + break; + case LCD_CAP_RECORD_TYPE: + record += sizeof(ATOM_LCD_MODE_CONTROL_CAP); + break; + case LCD_FAKE_EDID_PATCH_RECORD_TYPE: + fake_edid_record = (ATOM_FAKE_EDID_PATCH_RECORD *)record; + if (fake_edid_record->ucFakeEDIDLength) { + struct edid *edid; + int edid_size = + max((int)EDID_LENGTH, (int)fake_edid_record->ucFakeEDIDLength); + edid = kmalloc(edid_size, GFP_KERNEL); + if (edid) { + memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0], + fake_edid_record->ucFakeEDIDLength); + + if (drm_edid_is_valid(edid)) + rdev->mode_info.bios_hardcoded_edid = edid; + else + kfree(edid); + } + } + record += sizeof(ATOM_FAKE_EDID_PATCH_RECORD); + break; + case LCD_PANEL_RESOLUTION_RECORD_TYPE: + panel_res_record = (ATOM_PANEL_RESOLUTION_PATCH_RECORD *)record; + lvds->native_mode.width_mm = panel_res_record->usHSize; + lvds->native_mode.height_mm = panel_res_record->usVSize; + record += sizeof(ATOM_PANEL_RESOLUTION_PATCH_RECORD); + break; + default: + DRM_ERROR("Bad LCD record %d\n", *record); + bad_record = true; + break; + } + if (bad_record) + break; + } + } } return lvds; } |