Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / radeon / r100.c

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 2df3c860beb3e22ea9e6993be415b26f7f98dbcc..9e7e2bf03b815647451622d69c6cbce2d03582de 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -3217,6 +3217,9 @@ void r100_bandwidth_update(struct radeon_device *rdev)
        uint32_t pixel_bytes1 = 0;
        uint32_t pixel_bytes2 = 0;
 
+       /* Guess line buffer size to be 8192 pixels */
+       u32 lb_size = 8192;
+
        if (!rdev->mode_info.mode_config_initialized)
                return;
 
@@ -3631,6 +3634,13 @@ void r100_bandwidth_update(struct radeon_device *rdev)
                DRM_DEBUG_KMS("GRPH2_BUFFER_CNTL from to %x\n",
                          (unsigned int)RREG32(RADEON_GRPH2_BUFFER_CNTL));
        }
+
+       /* Save number of lines the linebuffer leads before the scanout */
+       if (mode1)
+           rdev->mode_info.crtcs[0]->lb_vblank_lead_lines = DIV_ROUND_UP(lb_size, mode1->crtc_hdisplay);
+
+       if (mode2)
+           rdev->mode_info.crtcs[1]->lb_vblank_lead_lines = DIV_ROUND_UP(lb_size, mode2->crtc_hdisplay);
 }
 
 int r100_ring_test(struct radeon_device *rdev, struct radeon_ring *ring)