diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2014-04-15 12:44:34 -0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-06-06 12:38:14 +0200 |
| commit | 1dadef4ce20d6f16ebd1003f9d903a4028861a3b (patch) | |
| tree | 38189f55177afaf8cedc2aefa3df6241880065b9 /drivers | |
| parent | 5bbd7bffabfb02b0467ccd3c6ade2b32c738eb70 (diff) | |
drm/radeon: fix ATPX detection on non-VGA GPUs
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@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: airlied@gmail.com
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atpx_handler.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index b8db0d7b508..7c6e3fd70e6 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -525,6 +525,13 @@ 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", |