Re: [PATCH 4/5] drm/amdgpu: fix build_coefficients() argument

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On 2020-10-29 11:53 p.m., Alex Deucher wrote:
On Mon, Oct 26, 2020 at 5:01 PM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:

From: Arnd Bergmann <arnd@xxxxxxxx>

gcc -Wextra warns about a function taking an enum argument
being called with a bool:

drivers/gpu/drm/amd/amdgpu/../display/modules/color/color_gamma.c: In function 'apply_degamma_for_user_regamma':
drivers/gpu/drm/amd/amdgpu/../display/modules/color/color_gamma.c:1617:29: warning: implicit conversion from 'enum <anonymous>' to 'enum dc_transfer_func_predefined' [-Wenum-conversion]
  1617 |  build_coefficients(&coeff, true);

It appears that a patch was added using the old calling conventions
after the type was changed, and the value should actually be 0
(TRANSFER_FUNCTION_SRGB) here instead of 1 (true).

This looks correct to me.  Harry, Leo?


Confirmed with Kruno, this is correct.

Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>

Harry

Alex



Fixes: 55a01d4023ce ("drm/amd/display: Add user_regamma to color module")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
  drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
index b8695660b480..09bc2c249e1a 100644
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -1614,7 +1614,7 @@ static void apply_degamma_for_user_regamma(struct pwl_float_data_ex *rgb_regamma
         struct pwl_float_data_ex *rgb = rgb_regamma;
         const struct hw_x_point *coord_x = coordinates_x;

-       build_coefficients(&coeff, true);
+       build_coefficients(&coeff, TRANSFER_FUNCTION_SRGB);

         i = 0;
         while (i != hw_points_num + 1) {
--
2.27.0

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