linux-kernel - [RFC PATCH 36/40] drm/amd/display: add plane shaper/3D LUT and shaper TF support

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Message-Id: <20230423141051.702990-37-mwen@igalia.com>
Date:   Sun, 23 Apr 2023 13:10:48 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     amd-gfx@...ts.freedesktop.org,
        Harry Wentland <harry.wentland@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        sunpeng.li@....com, Alex Deucher <alexander.deucher@....com>,
        dri-devel@...ts.freedesktop.org, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch
Cc:     Joshua Ashton <joshua@...ggi.es>,
        Sebastian Wick <sebastian.wick@...hat.com>,
        Xaver Hugl <xaver.hugl@...il.com>,
        Shashank Sharma <Shashank.Sharma@....com>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        sungjoon.kim@....com, Alex Hung <alex.hung@....com>,
        Melissa Wen <mwen@...lia.com>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 36/40] drm/amd/display: add plane shaper/3D LUT and shaper TF support

We already have the steps to program post-blending shaper/3D LUT on AMD
display driver, so that we can reuse them and map plane properties to DC
plane for pre-blending (plane) shaper/3D LUT setup.

Signed-off-by: Melissa Wen <mwen@...lia.com>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_color.c   | 34 +++++++++++++++++--
 .../drm/amd/display/dc/dcn20/dcn20_hwseq.c    |  5 +--
 2 files changed, 35 insertions(+), 4 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 854510b05194..e17141fc8d12 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
@@ -909,6 +909,35 @@ __set_dm_plane_degamma(struct drm_plane_state *plane_state,
 	}
 	return 0;
 }
+
+static int
+amdgpu_dm_plane_set_color_properties(struct drm_plane_state *plane_state,
+				     struct dc_plane_state *dc_plane_state)
+{
+	struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane_state);
+	enum drm_transfer_function shaper_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
+	const struct drm_color_lut *shaper_lut, *lut3d;
+	uint32_t lut3d_size, shaper_size;
+
+	/* We have nothing to do here, return */
+	if (!plane_state->color_mgmt_changed)
+		return 0;
+
+	dc_plane_state->hdr_mult = dc_fixpt_from_s3132(dm_plane_state->hdr_mult);
+
+	shaper_tf = dm_plane_state->shaper_tf;
+	shaper_lut = __extract_blob_lut(dm_plane_state->shaper_lut, &shaper_size);
+	lut3d = __extract_blob_lut(dm_plane_state->lut3d, &lut3d_size);
+	lut3d_size = lut3d != NULL ? lut3d_size : 0;
+	shaper_size = shaper_lut != NULL ? shaper_size : 0;
+
+	amdgpu_dm_atomic_lut3d(lut3d, lut3d_size, dc_plane_state->lut3d_func);
+	ret = amdgpu_dm_atomic_shaper_lut(shaper_lut, false,
+					  drm_tf_to_dc_tf(shaper_tf),
+					  shaper_size, dc_plane_state->in_shaper_func);
+
+	return ret;
+}
 #endif
 
 /**
@@ -939,7 +968,9 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
 	has_crtc_cm_degamma = (crtc->cm_has_degamma || crtc->cm_is_degamma_srgb);
 
 #ifdef CONFIG_STEAM_DECK
-	dc_plane_state->hdr_mult = dc_fixpt_from_s3132(dm_plane_state->hdr_mult);
+	ret = amdgpu_dm_plane_set_color_properties(plane_state, dc_plane_state);
+	if(ret)
+		return ret;
 
 	ret = __set_dm_plane_degamma(plane_state, dc_plane_state);
 	if (ret != -EINVAL)
@@ -971,6 +1002,5 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
 			return ret;
 	}
 
-
 	return 0;
 }
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 5800acf6aae1..91fee60410f4 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1759,8 +1759,9 @@ static void dcn20_program_pipe(
 		hws->funcs.set_hdr_multiplier(pipe_ctx);
 
 	if (pipe_ctx->update_flags.bits.enable ||
-			pipe_ctx->plane_state->update_flags.bits.in_transfer_func_change ||
-			pipe_ctx->plane_state->update_flags.bits.gamma_change)
+	    pipe_ctx->plane_state->update_flags.bits.in_transfer_func_change ||
+	    pipe_ctx->plane_state->update_flags.bits.gamma_change ||
+	    pipe_ctx->plane_state->update_flags.bits.lut_3d)
 		hws->funcs.set_input_transfer_func(dc, pipe_ctx, pipe_ctx->plane_state);
 
 	/* dcn10_translate_regamma_to_hw_format takes 750us to finish
-- 
2.39.2