This is a note to let you know that I've just added the patch titled
drm/radeon: fix ATPX detection on non-VGA GPUs
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-fix-atpx-detection-on-non-vga-gpus.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e9a4099a59cc598a44006059dd775c25e422b772 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@xxxxxxxxx>
Date: Tue, 15 Apr 2014 12:44:34 -0400
Subject: drm/radeon: fix ATPX detection on non-VGA GPUs
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From: Alex Deucher <alexdeucher@xxxxxxxxx>
commit e9a4099a59cc598a44006059dd775c25e422b772 upstream.
Some newer PX laptops have the pci device class
set to DISPLAY_OTHER rather than DISPLAY_VGA. This
properly detects ATPX on those laptops.
Based on a patch from: Pali Rohár <pali.rohar@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: airlied@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_atpx_handler.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
+++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
@@ -202,6 +202,13 @@ static bool radeon_atpx_detect(void)
has_atpx |= (radeon_atpx_pci_probe_handle(pdev) == true);
}
+ /* some newer PX laptops mark the dGPU as a non-VGA display device */
+ while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
+ vga_count++;
+
+ has_atpx |= (radeon_atpx_pci_probe_handle(pdev) == true);
+ }
+
if (has_atpx && vga_count == 2) {
acpi_get_name(radeon_atpx_priv.atpx_handle, ACPI_FULL_PATHNAME, &buffer);
printk(KERN_INFO "VGA switcheroo: detected switching method %s handle\n",
Patches currently in stable-queue which might be from alexdeucher@xxxxxxxxx are
queue-3.4/drm-radeon-fix-atpx-detection-on-non-vga-gpus.patch
queue-3.4/drm-radeon-call-drm_edid_to_eld-when-we-update-the-edid.patch
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