linux-kernel - [RFC PATCH v2 12/18] drm/amd/display: acquire/release 3D LUT resources for ctx on DCN301

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Date:   Mon,  9 Jan 2023 13:38:40 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        Rodrigo.Siqueira@....com, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch
Cc:     Joshua Ashton <joshua@...ggi.es>, alex.hung@....com,
        nicholas.kazlauskas@....com, sungjoon.kim@....com,
        seanpaul@...omium.org, bhawanpreet.lakha@....com,
        Shashank Sharma <shashank.sharma@....com>,
        ville.syrjala@...ux.intel.com, maarten.lankhorst@...ux.intel.com,
        mripard@...nel.org, tzimmermann@...e.de, kernel-dev@...lia.com,
        laurent.pinchart+renesas@...asonboard.com,
        Melissa Wen <mwen@...lia.com>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 12/18] drm/amd/display: acquire/release 3D LUT resources for ctx on DCN301

Acquire and release 3D LUT and shaper LUT every time we create/remove a
new ctx and add/remove stream to/from it. 3D LUT acquire/release can
fail and therefore we should check its availability during atomic check
considering the new context created not the current one.

Signed-off-by: Melissa Wen <mwen@...lia.com>
---
 .../amd/display/dc/dcn301/dcn301_resource.c   | 47 ++++++++++++++++++-
 1 file changed, 45 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
index ee62ae3eb98f..5bae0972bd5e 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
@@ -1260,6 +1260,49 @@ static struct display_stream_compressor *dcn301_dsc_create(
 	return &dsc->base;
 }
 
+static enum dc_status
+dcn301_add_stream_to_ctx(struct dc *dc,
+			 struct dc_state *new_ctx,
+			 struct dc_stream_state *dc_stream)
+{
+	enum dc_status result = DC_ERROR_UNEXPECTED;
+	struct dc_3dlut *lut3d_func_new = NULL;
+	struct dc_transfer_func *func_shaper_new = NULL;
+
+	result = dcn20_add_stream_to_ctx(dc, new_ctx, dc_stream);
+	if (result != DC_OK)
+		return result;
+
+	if (!dc_acquire_release_mpc_3dlut_for_ctx(dc, true, new_ctx, dc_stream,
+						  &lut3d_func_new, &func_shaper_new))
+		return DC_ERROR_UNEXPECTED;
+
+	dc_stream->lut3d_func = lut3d_func_new;
+	dc_stream->func_shaper = func_shaper_new;
+
+	return DC_OK;
+}
+
+static enum dc_status
+dcn301_remove_stream_from_ctx(struct dc *dc,
+			      struct dc_state *new_ctx,
+			      struct dc_stream_state *dc_stream)
+{
+	struct dc_3dlut *lut3d_func;
+	struct dc_transfer_func *func_shaper;
+
+	lut3d_func = (struct dc_3dlut *)dc_stream->lut3d_func;
+	func_shaper = (struct dc_transfer_func *)dc_stream->func_shaper;
+
+	if (!dc_acquire_release_mpc_3dlut_for_ctx(dc, false, new_ctx, dc_stream,
+						  &lut3d_func, &func_shaper))
+		return DC_ERROR_UNEXPECTED;
+
+	dc_stream->lut3d_func = lut3d_func;
+	dc_stream->func_shaper = func_shaper;
+
+	return dcn20_remove_stream_from_ctx(dc, new_ctx, dc_stream);
+}
 
 static void dcn301_destroy_resource_pool(struct resource_pool **pool)
 {
@@ -1406,9 +1449,9 @@ static struct resource_funcs dcn301_res_pool_funcs = {
 	.update_soc_for_wm_a = dcn30_update_soc_for_wm_a,
 	.populate_dml_pipes = dcn30_populate_dml_pipes_from_context,
 	.acquire_idle_pipe_for_layer = dcn20_acquire_idle_pipe_for_layer,
-	.add_stream_to_ctx = dcn30_add_stream_to_ctx,
+	.add_stream_to_ctx = dcn301_add_stream_to_ctx,
 	.add_dsc_to_stream_resource = dcn20_add_dsc_to_stream_resource,
-	.remove_stream_from_ctx = dcn20_remove_stream_from_ctx,
+	.remove_stream_from_ctx = dcn301_remove_stream_from_ctx,
 	.populate_dml_writeback_from_context = dcn30_populate_dml_writeback_from_context,
 	.set_mcif_arb_params = dcn30_set_mcif_arb_params,
 	.find_first_free_match_stream_enc_for_link = dcn10_find_first_free_match_stream_enc_for_link,
-- 
2.35.1