drm/radeon/kms: Get LVDS native mode details from EDID if necessary.
Fixes RMX problems on older Apple laptops which don't have an x86 BIOS ROM.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index d2842da..5ee81b6 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -227,6 +227,36 @@
return 0;
}
+static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
+ struct drm_connector *connector)
+{
+ struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+ struct radeon_native_mode *native_mode = &radeon_encoder->native_mode;
+
+ /* Try to get native mode details from EDID if necessary */
+ if (!native_mode->dotclock) {
+ struct drm_display_mode *t, *mode;
+
+ list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
+ if (mode->hdisplay == native_mode->panel_xres &&
+ mode->vdisplay == native_mode->panel_yres) {
+ native_mode->hblank = mode->htotal - mode->hdisplay;
+ native_mode->hoverplus = mode->hsync_start - mode->hdisplay;
+ native_mode->hsync_width = mode->hsync_end - mode->hsync_start;
+ native_mode->vblank = mode->vtotal - mode->vdisplay;
+ native_mode->voverplus = mode->vsync_start - mode->vdisplay;
+ native_mode->vsync_width = mode->vsync_end - mode->vsync_start;
+ native_mode->dotclock = mode->clock;
+ DRM_INFO("Determined LVDS native mode details from EDID\n");
+ break;
+ }
+ }
+ }
+ if (!native_mode->dotclock) {
+ DRM_INFO("No LVDS native mode details, disabling RMX\n");
+ radeon_encoder->rmx_type = RMX_OFF;
+ }
+}
static int radeon_lvds_get_modes(struct drm_connector *connector)
{
@@ -239,9 +269,11 @@
ret = radeon_ddc_get_modes(radeon_connector);
if (ret > 0) {
encoder = radeon_best_single_encoder(connector);
- if (encoder)
+ if (encoder) {
+ radeon_fixup_lvds_native_mode(encoder, connector);
/* add scaled modes */
radeon_add_common_modes(encoder, connector);
+ }
return ret;
}
}