drm/radeon/kms: use LCD physical size from vbios tables if available

Some systems have the LCD width and height in mm available in the
LCD info table.  Use this info if there is no EDID to provide it.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index ac882639b3ed..35c5ff09040d 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1500,6 +1500,9 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
                 if (misc & ATOM_DOUBLE_CLOCK_MODE)
                         lvds->native_mode.flags |= DRM_MODE_FLAG_DBLSCAN;
 
+                lvds->native_mode.width_mm = lvds_info->info.sLCDTiming.usImageHSize;
+                lvds->native_mode.height_mm = lvds_info->info.sLCDTiming.usImageVSize;
+
                 /* set crtc values */
                 drm_mode_set_crtcinfo(&lvds->native_mode, CRTC_INTERLACE_HALVE_V);
 
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 3bef9f6d66fd..f3ba066ded20 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -472,6 +472,9 @@ static int radeon_lvds_get_modes(struct drm_connector *connector)
         if (mode) {
                 ret = 1;
                 drm_mode_probed_add(connector, mode);
+                /* add the width/height from vbios tables if available */
+                connector->display_info.width_mm = mode->width_mm;
+                connector->display_info.height_mm = mode->height_mm;
                 /* add scaled modes */
                 radeon_add_common_modes(encoder, connector);
         }