3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexdeuc...@gmail.com>
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.ro...@gmail.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: airl...@gmail.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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",
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
