[RFC PATCH v2 17/18] drm/amd/display: decouple steps to reuse in shaper LUT support

[Melissa Wen]

Decouple steps of shaper LUT setup and LUT size validation according to
HW caps as a preparation for shaper LUT support.

Signed-off-by: Melissa Wen <m...@igalia.com>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_color.c   | 22 ++++++++++++-------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index 0fb1244c8aef..8a930f9bce60 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
@@ -497,6 +497,19 @@ static void amdgpu_dm_atomic_lut3d(struct dc_stream_state 
*stream,
        stream->lut3d_func = lut;
 }
 
+static int amdgpu_dm_atomic_shaper_lut(struct dc_stream_state *stream,
+                                      struct dc_transfer_func *func_shaper_new)
+{
+       /* We don't get DRM shaper LUT yet. We assume the input color space is 
already
+        * delinearized, so we don't need a shaper LUT and we can just BYPASS
+        */
+       func_shaper_new->type = TF_TYPE_BYPASS;
+       func_shaper_new->tf = TRANSFER_FUNCTION_LINEAR;
+       stream->func_shaper = func_shaper_new;
+
+       return 0;
+}
+
 /* amdgpu_dm_atomic_shaper_lut3d - set DRM CRTC shaper LUT and 3D LUT to DC
  * interface
  * @dc: Display Core control structure
@@ -519,18 +532,11 @@ static int amdgpu_dm_atomic_shaper_lut3d(struct dc *dc,
        lut3d_func_new = (struct dc_3dlut *) stream->lut3d_func;
        func_shaper_new = (struct dc_transfer_func *) stream->func_shaper;
 
-       /* We don't get DRM shaper LUT yet. We assume the input color space is
-        * already delinearized, so we don't need a shaper LUT and we can just
-        * BYPASS.
-        */
-       func_shaper_new->type = TF_TYPE_BYPASS;
-       func_shaper_new->tf = TRANSFER_FUNCTION_LINEAR;
-       stream->func_shaper = func_shaper_new;
 
        amdgpu_dm_atomic_lut3d(stream, drm_lut3d, drm_lut3d_size,
                               mode, lut3d_func_new);
 
-       return 0;
+       return amdgpu_dm_atomic_shaper_lut(stream, func_shaper_new);
 }
 
 static const struct drm_mode_lut3d_mode *
-- 
2.35.1