From 0274a54897f356f9c78767c4a2a5863f7dde90c6 Mon Sep 17 00:00:00 2001 From: Melissa Wen Date: Mon, 8 Dec 2025 22:44:15 -0100 Subject: [PATCH] drm/amd/display: extend delta clamping logic to CM3 LUT helper Commit 27fc10d1095f ("drm/amd/display: Fix the delta clamping for shaper LUT") fixed banding when using plane shaper LUT in DCN10 CM helper. The problem is also present in DCN30 CM helper, fix banding by extending the same bug delta clamping fix to CM3. Signed-off-by: Melissa Wen Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- .../amd/display/dc/dcn30/dcn30_cm_common.c | 30 +++++++++++++++---- .../display/dc/dwb/dcn30/dcn30_cm_common.h | 2 +- .../amd/display/dc/hwss/dcn30/dcn30_hwseq.c | 9 +++--- .../amd/display/dc/hwss/dcn32/dcn32_hwseq.c | 17 ++++++----- .../amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 16 +++++----- 5 files changed, 49 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c index a4f14b16564c2..227aa8672d17b 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c @@ -105,9 +105,12 @@ void cm_helper_program_gamcor_xfer_func( #define NUMBER_REGIONS 32 #define NUMBER_SW_SEGMENTS 16 -bool cm3_helper_translate_curve_to_hw_format( - const struct dc_transfer_func *output_tf, - struct pwl_params *lut_params, bool fixpoint) +#define DC_LOGGER \ + ctx->logger + +bool cm3_helper_translate_curve_to_hw_format(struct dc_context *ctx, + const struct dc_transfer_func *output_tf, + struct pwl_params *lut_params, bool fixpoint) { struct curve_points3 *corner_points; struct pwl_result_data *rgb_resulted; @@ -251,6 +254,10 @@ bool cm3_helper_translate_curve_to_hw_format( if (fixpoint == true) { i = 1; while (i != hw_points + 2) { + uint32_t red_clamp; + uint32_t green_clamp; + uint32_t blue_clamp; + if (i >= hw_points) { if (dc_fixpt_lt(rgb_plus_1->red, rgb->red)) rgb_plus_1->red = dc_fixpt_add(rgb->red, @@ -263,9 +270,20 @@ bool cm3_helper_translate_curve_to_hw_format( rgb_minus_1->delta_blue); } - rgb->delta_red_reg = dc_fixpt_clamp_u0d10(rgb->delta_red); - rgb->delta_green_reg = dc_fixpt_clamp_u0d10(rgb->delta_green); - rgb->delta_blue_reg = dc_fixpt_clamp_u0d10(rgb->delta_blue); + rgb->delta_red = dc_fixpt_sub(rgb_plus_1->red, rgb->red); + rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green); + rgb->delta_blue = dc_fixpt_sub(rgb_plus_1->blue, rgb->blue); + + red_clamp = dc_fixpt_clamp_u0d14(rgb->delta_red); + green_clamp = dc_fixpt_clamp_u0d14(rgb->delta_green); + blue_clamp = dc_fixpt_clamp_u0d14(rgb->delta_blue); + + if (red_clamp >> 10 || green_clamp >> 10 || blue_clamp >> 10) + DC_LOG_ERROR("Losing delta precision while programming shaper LUT."); + + rgb->delta_red_reg = red_clamp & 0x3ff; + rgb->delta_green_reg = green_clamp & 0x3ff; + rgb->delta_blue_reg = blue_clamp & 0x3ff; rgb->red_reg = dc_fixpt_clamp_u0d14(rgb->red); rgb->green_reg = dc_fixpt_clamp_u0d14(rgb->green); rgb->blue_reg = dc_fixpt_clamp_u0d14(rgb->blue); diff --git a/drivers/gpu/drm/amd/display/dc/dwb/dcn30/dcn30_cm_common.h b/drivers/gpu/drm/amd/display/dc/dwb/dcn30/dcn30_cm_common.h index b86347c9b0389..95f9318a54efc 100644 --- a/drivers/gpu/drm/amd/display/dc/dwb/dcn30/dcn30_cm_common.h +++ b/drivers/gpu/drm/amd/display/dc/dwb/dcn30/dcn30_cm_common.h @@ -59,7 +59,7 @@ void cm_helper_program_gamcor_xfer_func( const struct pwl_params *params, const struct dcn3_xfer_func_reg *reg); -bool cm3_helper_translate_curve_to_hw_format( +bool cm3_helper_translate_curve_to_hw_format(struct dc_context *ctx, const struct dc_transfer_func *output_tf, struct pwl_params *lut_params, bool fixpoint); 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 d58f2cf2615c0..d04cfd403b7ee 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 @@ -241,7 +241,7 @@ 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) { - result = cm3_helper_translate_curve_to_hw_format( + result = cm3_helper_translate_curve_to_hw_format(plane_state->ctx, &plane_state->blend_tf, &dpp_base->regamma_params, false); if (!result) return result; @@ -336,8 +336,9 @@ bool dcn30_set_input_transfer_func(struct dc *dc, if (plane_state->in_transfer_func.type == TF_TYPE_HWPWL) params = &plane_state->in_transfer_func.pwl; else if (plane_state->in_transfer_func.type == TF_TYPE_DISTRIBUTED_POINTS && - cm3_helper_translate_curve_to_hw_format(&plane_state->in_transfer_func, - &dpp_base->degamma_params, false)) + cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->in_transfer_func, + &dpp_base->degamma_params, false)) params = &dpp_base->degamma_params; result = dpp_base->funcs->dpp_program_gamcor_lut(dpp_base, params); @@ -408,7 +409,7 @@ bool dcn30_set_output_transfer_func(struct dc *dc, params = &stream->out_transfer_func.pwl; else if (pipe_ctx->stream->out_transfer_func.type == TF_TYPE_DISTRIBUTED_POINTS && - cm3_helper_translate_curve_to_hw_format( + cm3_helper_translate_curve_to_hw_format(stream->ctx, &stream->out_transfer_func, &mpc->blender_params, false)) params = &mpc->blender_params; 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 37300e12e6455..1be1213496729 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 @@ -493,8 +493,9 @@ 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) { - result = cm3_helper_translate_curve_to_hw_format(&plane_state->blend_tf, - &dpp_base->regamma_params, false); + result = cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->blend_tf, + &dpp_base->regamma_params, false); if (!result) return result; @@ -509,8 +510,9 @@ bool dcn32_set_mcm_luts( else if (plane_state->in_shaper_func.type == TF_TYPE_DISTRIBUTED_POINTS) { // TODO: dpp_base replace ASSERT(false); - cm3_helper_translate_curve_to_hw_format(&plane_state->in_shaper_func, - &dpp_base->shaper_params, true); + cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->in_shaper_func, + &dpp_base->shaper_params, true); lut_params = &dpp_base->shaper_params; } @@ -550,8 +552,9 @@ bool dcn32_set_input_transfer_func(struct dc *dc, if (plane_state->in_transfer_func.type == TF_TYPE_HWPWL) params = &plane_state->in_transfer_func.pwl; else if (plane_state->in_transfer_func.type == TF_TYPE_DISTRIBUTED_POINTS && - cm3_helper_translate_curve_to_hw_format(&plane_state->in_transfer_func, - &dpp_base->degamma_params, false)) + cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->in_transfer_func, + &dpp_base->degamma_params, false)) params = &dpp_base->degamma_params; dpp_base->funcs->dpp_program_gamcor_lut(dpp_base, params); @@ -582,7 +585,7 @@ bool dcn32_set_output_transfer_func(struct dc *dc, params = &stream->out_transfer_func.pwl; else if (pipe_ctx->stream->out_transfer_func.type == TF_TYPE_DISTRIBUTED_POINTS && - cm3_helper_translate_curve_to_hw_format( + cm3_helper_translate_curve_to_hw_format(stream->ctx, &stream->out_transfer_func, &mpc->blender_params, false)) params = &mpc->blender_params; diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c index 9cda39d0ed95f..b91517b9fedcf 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c @@ -432,7 +432,7 @@ void dcn401_populate_mcm_luts(struct dc *dc, if (mcm_luts.lut1d_func->type == TF_TYPE_HWPWL) m_lut_params.pwl = &mcm_luts.lut1d_func->pwl; else if (mcm_luts.lut1d_func->type == TF_TYPE_DISTRIBUTED_POINTS) { - rval = cm3_helper_translate_curve_to_hw_format( + rval = cm3_helper_translate_curve_to_hw_format(mpc->ctx, mcm_luts.lut1d_func, &dpp_base->regamma_params, false); m_lut_params.pwl = rval ? &dpp_base->regamma_params : NULL; @@ -452,7 +452,7 @@ void dcn401_populate_mcm_luts(struct dc *dc, m_lut_params.pwl = &mcm_luts.shaper->pwl; else if (mcm_luts.shaper->type == TF_TYPE_DISTRIBUTED_POINTS) { ASSERT(false); - rval = cm3_helper_translate_curve_to_hw_format( + rval = cm3_helper_translate_curve_to_hw_format(mpc->ctx, mcm_luts.shaper, &dpp_base->regamma_params, true); m_lut_params.pwl = rval ? &dpp_base->regamma_params : NULL; @@ -629,8 +629,9 @@ bool dcn401_set_mcm_luts(struct pipe_ctx *pipe_ctx, 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) { - rval = cm3_helper_translate_curve_to_hw_format(&plane_state->blend_tf, - &dpp_base->regamma_params, false); + rval = cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->blend_tf, + &dpp_base->regamma_params, false); lut_params = rval ? &dpp_base->regamma_params : NULL; } result = mpc->funcs->program_1dlut(mpc, lut_params, mpcc_id); @@ -641,8 +642,9 @@ bool dcn401_set_mcm_luts(struct pipe_ctx *pipe_ctx, lut_params = &plane_state->in_shaper_func.pwl; else if (plane_state->in_shaper_func.type == TF_TYPE_DISTRIBUTED_POINTS) { // TODO: dpp_base replace - rval = cm3_helper_translate_curve_to_hw_format(&plane_state->in_shaper_func, - &dpp_base->shaper_params, true); + rval = cm3_helper_translate_curve_to_hw_format(plane_state->ctx, + &plane_state->in_shaper_func, + &dpp_base->shaper_params, true); lut_params = rval ? &dpp_base->shaper_params : NULL; } result &= mpc->funcs->program_shaper(mpc, lut_params, mpcc_id); @@ -676,7 +678,7 @@ bool dcn401_set_output_transfer_func(struct dc *dc, params = &stream->out_transfer_func.pwl; else if (pipe_ctx->stream->out_transfer_func.type == TF_TYPE_DISTRIBUTED_POINTS && - cm3_helper_translate_curve_to_hw_format( + cm3_helper_translate_curve_to_hw_format(stream->ctx, &stream->out_transfer_func, &mpc->blender_params, false)) params = &mpc->blender_params; -- 2.47.3