diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2014-04-15 12:44:34 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-07 13:25:32 -0700 |
| commit | 7f69542687b31c83bcc54a3033f060531be57292 (patch) | |
| tree | 1a0686563d2392eba269139d7e181ce61b032f40 | |
| parent | 095b9f1a78be7d5bfdafe1a77c294f1f88ed7f30 (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 cbb06d7c89b..8c44ef57864 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -523,6 +523,13 @@ 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", |