drm/radeon: track whether the GPU controls the backlight (v2)
A table in the vbios tells us whether the GPU backlight controller
is used or not. If the bit is set, the GPU backlight controller is
used; if it is not set, an off-chip backlight controller is used.
v2: store all the firmware flags, not just BL control
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index d67d4f3..e368b30 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1254,6 +1254,10 @@
if (rdev->clock.max_pixel_clock == 0)
rdev->clock.max_pixel_clock = 40000;
+ /* not technically a clock, but... */
+ rdev->mode_info.firmware_flags =
+ le16_to_cpu(firmware_info->info.usFirmwareCapability.susAccess);
+
return true;
}
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index d569789..806140d 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -252,6 +252,8 @@
/* pointer to fbdev info structure */
struct radeon_fbdev *rfbdev;
+ /* firmware flags */
+ u16 firmware_flags;
};
#define MAX_H_CODE_TIMING_LEN 32