[PATCH 33/39] drm/amd/display: Ensure curve to hw translation succeed

[Alex Hung]

[WHAT & HOW]
Check cm3_helper_translate_curve_to_hw_format runs successfully so the
regamma_params is valid and can be used.

Also revmoed two result assignments.

This fixes 2 CHECKED_RETURN UNUSED_VALUE issues reported by Coverity.

Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Acked-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Alex Hung <alex.h...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c | 5 ++++-
 drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c | 9 ++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c
index bcacfd893cf7..eaeeade31ed7 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c
@@ -228,8 +228,11 @@ bool dcn30_set_blend_lut(
        if (plane_state->blend_tf.type == TF_TYPE_HWPWL)
                blend_lut = &plane_state->blend_tf.pwl;
        else if (plane_state->blend_tf.type == TF_TYPE_DISTRIBUTED_POINTS) {
-               cm3_helper_translate_curve_to_hw_format(
+               result = cm3_helper_translate_curve_to_hw_format(
                                &plane_state->blend_tf, 
&dpp_base->regamma_params, false);
+               if (!result)
+                       return result;
+
                blend_lut = &dpp_base->regamma_params;
        }
        result = dpp_base->funcs->dpp_program_blnd_lut(dpp_base, blend_lut);
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
index fe62478fbcde..05d8f81daa06 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
@@ -483,11 +483,14 @@ bool dcn32_set_mcm_luts(
        if (plane_state->blend_tf.type == TF_TYPE_HWPWL)
                lut_params = &plane_state->blend_tf.pwl;
        else if (plane_state->blend_tf.type == TF_TYPE_DISTRIBUTED_POINTS) {
-               cm3_helper_translate_curve_to_hw_format(&plane_state->blend_tf,
+               result = 
cm3_helper_translate_curve_to_hw_format(&plane_state->blend_tf,
                                &dpp_base->regamma_params, false);
+               if (!result)
+                       return result;
+
                lut_params = &dpp_base->regamma_params;
        }
-       result = mpc->funcs->program_1dlut(mpc, lut_params, mpcc_id);
+       mpc->funcs->program_1dlut(mpc, lut_params, mpcc_id);
        lut_params = NULL;
 
        // Shaper
@@ -501,7 +504,7 @@ bool dcn32_set_mcm_luts(
                lut_params = &dpp_base->shaper_params;
        }
 
-       result = mpc->funcs->program_shaper(mpc, lut_params, mpcc_id);
+       mpc->funcs->program_shaper(mpc, lut_params, mpcc_id);
 
        // 3D
        if (plane_state->lut3d_func.state.bits.initialized == 1)
-- 
2.34.1