From 27fc10d1095f7a7de7c917638d7134033a190dd8 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Thu, 6 Apr 2023 18:06:27 -0400
Subject: [PATCH] drm/amd/display: Fix the delta clamping for shaper LUT
Git-commit: 27fc10d1095f7a7de7c917638d7134033a190dd8
Patch-mainline: v6.5-rc1
References: git-fixes
The shaper LUT requires a 10-bit value of the delta between segments. We
were using dc_fixpt_clamp_u0d10() to do that but it doesn't do what we
want it to do. It will preserve 10-bit precision after the decimal
point, but that's not quite what we want. We want 14-bit precision and
discard the 4 most-significant bytes.
To do that we'll do dc_fixpt_clamp_u0d14() & 0x3ff instead.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../amd/display/dc/dcn10/dcn10_cm_common.c | 19 +++++++++++++++----
.../amd/display/dc/dcn10/dcn10_cm_common.h | 1 +
.../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 2 +-
.../drm/amd/display/dc/dcn20/dcn20_hwseq.c | 6 +++---
.../drm/amd/display/dc/dcn30/dcn30_dwb_cm.c | 2 +-
.../drm/amd/display/dc/dcn30/dcn30_hwseq.c | 2 +-
.../drm/amd/display/dc/dcn32/dcn32_hwseq.c | 6 +++---
7 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c
index 7a00fe525dfb..3538973bd0c6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c
@@ -308,7 +308,10 @@ bool cm_helper_convert_to_custom_float(
#define NUMBER_REGIONS 32
#define NUMBER_SW_SEGMENTS 16
-bool cm_helper_translate_curve_to_hw_format(
+#define DC_LOGGER \
+ ctx->logger
+
+bool cm_helper_translate_curve_to_hw_format(struct dc_context *ctx,
const struct dc_transfer_func *output_tf,
struct pwl_params *lut_params, bool fixpoint)
{
@@ -482,10 +485,18 @@ bool cm_helper_translate_curve_to_hw_format(
rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
rgb->delta_blue = dc_fixpt_sub(rgb_plus_1->blue, rgb->blue);
+
if (fixpoint == true) {
- 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);
+ uint32_t red_clamp = dc_fixpt_clamp_u0d14(rgb->delta_red);
+ uint32_t green_clamp = dc_fixpt_clamp_u0d14(rgb->delta_green);
+ uint32_t blue_clamp = dc_fixpt_clamp_u0d14(rgb->delta_blue);
+
+ if (red_clamp >> 10 || green_clamp >> 10 || blue_clamp >> 10)
+ DC_LOG_WARNING("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/dcn10/dcn10_cm_common.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.h
index 3b8cd7410498..0a68b63d6126 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.h
@@ -106,6 +106,7 @@ bool cm_helper_convert_to_custom_float(
bool fixpoint);
bool cm_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/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 20a1582be0b1..a50309039d08 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1843,7 +1843,7 @@ bool dcn10_set_output_transfer_func(struct dc *dc, struct pipe_ctx *pipe_ctx,
/* dcn10_translate_regamma_to_hw_format takes 750us, only do it when full
* update.
*/
- else if (cm_helper_translate_curve_to_hw_format(
+ else if (cm_helper_translate_curve_to_hw_format(dc->ctx,
stream->out_transfer_func,
&dpp->regamma_params, false)) {
dpp->funcs->dpp_program_regamma_pwl(
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 4c8aa3dfb959..4492bc2392b6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -867,7 +867,7 @@ bool dcn20_set_output_transfer_func(struct dc *dc, struct pipe_ctx *pipe_ctx,
params = &stream->out_transfer_func->pwl;
else if (pipe_ctx->stream->out_transfer_func->type ==
TF_TYPE_DISTRIBUTED_POINTS &&
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(dc->ctx,
stream->out_transfer_func,
&mpc->blender_params, false))
params = &mpc->blender_params;
@@ -896,7 +896,7 @@ bool dcn20_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) {
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(plane_state->ctx,
plane_state->blend_tf,
&dpp_base->regamma_params, false);
blend_lut = &dpp_base->regamma_params;
@@ -918,7 +918,7 @@ bool dcn20_set_shaper_3dlut(
if (plane_state->in_shaper_func->type == TF_TYPE_HWPWL)
shaper_lut = &plane_state->in_shaper_func->pwl;
else if (plane_state->in_shaper_func->type == TF_TYPE_DISTRIBUTED_POINTS) {
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(plane_state->ctx,
plane_state->in_shaper_func,
&dpp_base->shaper_params, true);
shaper_lut = &dpp_base->shaper_params;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c
index 6a3d3a0ec0a3..701c7d8bc038 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c
@@ -280,7 +280,7 @@ bool dwb3_ogam_set_input_transfer_func(
dwb_ogam_lut = kzalloc(sizeof(*dwb_ogam_lut), GFP_KERNEL);
if (dwb_ogam_lut) {
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(dwbc->ctx,
in_transfer_func_dwb_ogam,
dwb_ogam_lut, false);
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
index b9753867d97b..bf8864bc8a99 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
@@ -106,7 +106,7 @@ static bool dcn30_set_mpc_shaper_3dlut(struct pipe_ctx *pipe_ctx,
if (stream->func_shaper->type == TF_TYPE_HWPWL) {
shaper_lut = &stream->func_shaper->pwl;
} else if (stream->func_shaper->type == TF_TYPE_DISTRIBUTED_POINTS) {
- cm_helper_translate_curve_to_hw_format(stream->func_shaper,
+ cm_helper_translate_curve_to_hw_format(stream->ctx, stream->func_shaper,
&dpp_base->shaper_params, true);
shaper_lut = &dpp_base->shaper_params;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index e5bd76c6b1d3..526e89ef9cdc 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -448,7 +448,7 @@ bool dcn32_set_mpc_shaper_3dlut(
if (stream->func_shaper->type == TF_TYPE_HWPWL)
shaper_lut = &stream->func_shaper->pwl;
else if (stream->func_shaper->type == TF_TYPE_DISTRIBUTED_POINTS) {
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(stream->ctx,
stream->func_shaper,
&dpp_base->shaper_params, true);
shaper_lut = &dpp_base->shaper_params;
@@ -484,7 +484,7 @@ 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) {
- cm_helper_translate_curve_to_hw_format(
+ cm_helper_translate_curve_to_hw_format(plane_state->ctx,
plane_state->blend_tf,
&dpp_base->regamma_params, false);
lut_params = &dpp_base->regamma_params;
@@ -499,7 +499,7 @@ bool dcn32_set_mcm_luts(
else if (plane_state->in_shaper_func->type == TF_TYPE_DISTRIBUTED_POINTS) {
// TODO: dpp_base replace
ASSERT(false);
- cm_helper_translate_curve_to_hw_format(
+ cm_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;
--
2.43.0