[Bug 34082] New: Incorrect / missing device id in radeon_atombios.c

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Fri Apr 29 02:56:49 PDT 2011


           Summary: Incorrect / missing device id in radeon_atombios.c
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.38+
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: zhamahn at gmail.com
        Regression: No

I have an Acer TravelMate 5730, and the scenario described around line 434 in
radeon_atombios.c applies to this model as well. The problem is that the 5730
has a different device id than 5730G (at least my machine has). Changing the
relevant id from 0x95c4 to 0x9591 fixes everything for me.

Without changing the id, HDMI output works only if I turn it off with xrandr
and then use DVI (which this laptop doesn't have) and it doesn't even work that
well then, I also get lots of invalid EDID spam in dmesg.

Apr 28 23:00:26 localhost kernel: [ 3476.326407] [drm:radeon_dvi_detect]
*ERROR* DVI-I-1: probed a monitor but no|invalid EDID
Apr 28 23:02:19 localhost kernel: [ 3589.819736] [drm:radeon_dvi_detect]
*ERROR* HDMI-A-1: probed a monitor but no|invalid EDID
Apr 28 23:04:02 localhost kernel: [ 3692.619727] [drm:radeon_dvi_detect]
*ERROR* DVI-I-1: probed a monitor but no|invalid EDID
Apr 28 23:05:24 localhost kernel: [ 3774.783055] [drm:radeon_dvi_detect]
*ERROR* HDMI-A-1: probed a monitor but no|invalid EDID

This patch fixes the problems mentioned above. It just copies the entry for
5730G and changes the device id.

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c
index f5d12fb..d706df5 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -451,6 +451,18 @@ static bool radeon_atom_apply_quirks(struct drm_device

+  /* Same as above, but for Acer Travelmate 5730 */
+    if ((dev->pdev->device == 0x9591) &&
+        (dev->pdev->subsystem_vendor == 0x1025) &&
+        (dev->pdev->subsystem_device == 0x013c)) {
+        if ((*connector_type == DRM_MODE_CONNECTOR_DVII) &&
+            (supported_device == ATOM_DEVICE_DFP1_SUPPORT)) {
+            /* actually it's a DVI-D port not DVI-I */
+            *connector_type = DRM_MODE_CONNECTOR_DVID;
+            return false;
+        }
+    }
     /* XFX Pine Group device rv730 reports no VGA DDC lines
      * even though they are wired up to record 0x93

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