drm/amdgpu/dce11: update async flip update time

Use UPDATE_IMMEDIATE (update on next data request boundary) rather
than UPDATE_H_RETRACE (update on next line boundary).  The data
request boundary is less than a scanline, so it update will happen
sooner.

Cc: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index c90408b..d4bf133 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -307,11 +307,10 @@ static void dce_v11_0_page_flip(struct amdgpu_device *adev,
        struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[crtc_id];
        u32 tmp;
 
-       /* flip at hsync for async, default is vsync */
-       /* use UPDATE_IMMEDIATE_EN instead for async? */
+       /* flip immediate for async, default is vsync */
        tmp = RREG32(mmGRPH_FLIP_CONTROL + amdgpu_crtc->crtc_offset);
        tmp = REG_SET_FIELD(tmp, GRPH_FLIP_CONTROL,
-                           GRPH_SURFACE_UPDATE_H_RETRACE_EN, async ? 1 : 0);
+                           GRPH_SURFACE_UPDATE_IMMEDIATE_EN, async ? 1 : 0);
        WREG32(mmGRPH_FLIP_CONTROL + amdgpu_crtc->crtc_offset, tmp);
        /* update the scanout addresses */
        WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,