radeon: adjust LVDS so that default modes get added

we can scale, so add the default modes.  for panels
with an EDID, set the continous freq bit.  for panels without
and EDID, add a FAKE edid with the continous freq bit set.

Based on similar code in the Intel driver.

1 files changed, 32 insertions, 0 deletions

diff --git a/src/radeon_output.c b/src/radeon_output.c
index 6bbe9abc..cded74be 100644
--- a/src/radeon_output.c
+++ b/src/radeon_output.c
@@ -208,6 +208,37 @@ radeon_set_active_device(xf86OutputPtr output)
     }
 }
 
+/* X Server pre-1.5 compatibility */
+#ifndef DS_VENDOR
+#define DS_VENDOR 0x101
+#endif
+
+static void radeon_fixup_edid_for_panel(xf86MonPtr edid_mon)
+{
+    int i, j = -1;
+
+    if (edid_mon) {
+	/* mark it to support continous timing so we can add default modes */
+	edid_mon->features.msc |= 0x1;
+	for (i = 0; i < sizeof (edid_mon->det_mon) / sizeof (edid_mon->det_mon[0]); i++) {
+	    if (edid_mon->det_mon[i].type >= DS_VENDOR && j == -1)
+		j = i;
+	    if (edid_mon->det_mon[i].type == DS_RANGES) {
+		j = i;
+		break;
+	    }
+	}
+	if (j != -1) {
+	    struct monitor_ranges   *ranges = &edid_mon->det_mon[j].section.ranges;
+	    edid_mon->det_mon[j].type = DS_RANGES;
+	    ranges->min_v = 0;
+	    ranges->max_v = 200;
+	    ranges->min_h = 0;
+	    ranges->max_h = 200;
+	}
+    }
+}
+
 static RADEONMonitorType
 radeon_ddc_connected(xf86OutputPtr output)
 {
@@ -242,6 +273,7 @@ radeon_ddc_connected(xf86OutputPtr output)
 	switch (radeon_output->ConnectorType) {
 	case CONNECTOR_LVDS:
 	    MonType = MT_LCD;
+	    radeon_fixup_edid_for_panel(MonInfo);
 	    break;
 	case CONNECTOR_DVI_D:
 	case CONNECTOR_HDMI_TYPE_A: