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>

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 35c5ff0..d6c611e 100644 (file)
--- 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;
 }

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 3bddea5..111a844 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -471,8 +471,9 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
        return true;
 }
 
+/* this is used for atom LCDs as well */
 struct edid *
-radeon_combios_get_hardcoded_edid(struct radeon_device *rdev)
+radeon_bios_get_hardcoded_edid(struct radeon_device *rdev)
 {
        if (rdev->mode_info.bios_hardcoded_edid)
                return rdev->mode_info.bios_hardcoded_edid;

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 7b17e63..acebbc7 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -679,9 +679,17 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
        if (!radeon_connector->edid) {
                radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
        }
-       /* some servers provide a hardcoded edid in rom for KVMs */
-       if (!radeon_connector->edid)
-               radeon_connector->edid = radeon_combios_get_hardcoded_edid(rdev);
+
+       if (!radeon_connector->edid) {
+               if (rdev->is_atom_bios) {
+                       /* some laptops provide a hardcoded edid in rom for LCDs */
+                       if (((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_LVDS) ||
+                            (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)))
+                               radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
+               } else
+                       /* some servers provide a hardcoded edid in rom for KVMs */
+                       radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
+       }
        if (radeon_connector->edid) {
                drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
                ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index f406f02..fd185f7 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -566,7 +566,7 @@ extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
 
 extern bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev);
 extern struct edid *
-radeon_combios_get_hardcoded_edid(struct radeon_device *rdev);
+radeon_bios_get_hardcoded_edid(struct radeon_device *rdev);
 extern bool radeon_atom_get_clock_info(struct drm_device *dev);
 extern bool radeon_combios_get_clock_info(struct drm_device *dev);
 extern struct radeon_encoder_atom_dig *