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 (file)
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1254,6 +1254,10 @@ bool radeon_atom_get_clock_info(struct drm_device *dev)
                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 (file)
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -252,6 +252,8 @@ struct radeon_mode_info {
 
        /* pointer to fbdev info structure */
        struct radeon_fbdev *rfbdev;
+       /* firmware flags */
+       u16 firmware_flags;
 };
 
 #define MAX_H_CODE_TIMING_LEN 32