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drm/radeon/kms: parse the extended LCD info block

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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>
This commit is contained in:
Alex Deucher
2010-12-08 22:13:06 -05:00
committed by Dave Airlie
parent 7a868e18a4
commit c324acd503
4 changed files with 67 additions and 5 deletions
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53
drivers/gpu/drm/radeon/radeon_atombios.c
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@@ -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;
}