linux-kernel - [RFC PATCH v2 11/18] drm/amd/display: handle MPC 3D LUT resources for a given context

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Message-Id: <20230109143846.1966301-12-mwen@igalia.com>
Date:   Mon,  9 Jan 2023 13:38:39 -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 11/18] drm/amd/display: handle MPC 3D LUT resources for a given context

In the original dc_acquire_release_mpc_3dlut(), only current ctx is
considered, which doesn't fit the steps for atomic checking new ctx.
Therefore, create a function to handle 3D LUT resource for a given
context, so that we can check resources availability in atomic_check
time and handle failures properly.

Signed-off-by: Melissa Wen <mwen@...lia.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 39 ++++++++++++++++++++++++
 drivers/gpu/drm/amd/display/dc/dc.h      |  8 +++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 88f1130c3b83..76270d21286a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2085,6 +2085,45 @@ bool dc_acquire_release_mpc_3dlut(
 	return ret;
 }
 
+bool
+dc_acquire_release_mpc_3dlut_for_ctx(struct dc *dc,
+				     bool acquire,
+				     struct dc_state *state,
+				     struct dc_stream_state *stream,
+				     struct dc_3dlut **lut,
+				     struct dc_transfer_func **shaper)
+{
+	int pipe_idx;
+	bool ret = false;
+	bool found_pipe_idx = false;
+	const struct resource_pool *pool = dc->res_pool;
+	struct resource_context *res_ctx = &state->res_ctx;
+	int mpcc_id = 0;
+
+	if (pool && res_ctx) {
+		if (acquire) {
+			/*find pipe idx for the given stream*/
+			for (pipe_idx = 0; pipe_idx < pool->pipe_count; pipe_idx++) {
+				if (res_ctx->pipe_ctx[pipe_idx].stream == stream) {
+					found_pipe_idx = true;
+					mpcc_id = res_ctx->pipe_ctx[pipe_idx].plane_res.hubp->inst;
+					break;
+				}
+			}
+		} else
+			found_pipe_idx = true;/*for release pipe_idx is not required*/
+
+		if (found_pipe_idx) {
+			if (acquire && pool->funcs->acquire_post_bldn_3dlut)
+				ret = pool->funcs->acquire_post_bldn_3dlut(res_ctx, pool, mpcc_id, lut, shaper);
+			else if (!acquire && pool->funcs->release_post_bldn_3dlut)
+				ret = pool->funcs->release_post_bldn_3dlut(res_ctx, pool, lut, shaper);
+		}
+	}
+	return ret;
+}
+
+
 static bool is_flip_pending_in_pipes(struct dc *dc, struct dc_state *context)
 {
 	int i;
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 72963617553e..a5abf7f308c3 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1345,6 +1345,14 @@ bool dc_acquire_release_mpc_3dlut(
 		struct dc_3dlut **lut,
 		struct dc_transfer_func **shaper);
 
+bool
+dc_acquire_release_mpc_3dlut_for_ctx(struct dc *dc,
+				     bool acquire,
+				     struct dc_state *state,
+				     struct dc_stream_state *stream,
+				     struct dc_3dlut **lut,
+				     struct dc_transfer_func **shaper);
+
 void dc_resource_state_copy_construct(
 		const struct dc_state *src_ctx,
 		struct dc_state *dst_ctx);
-- 
2.35.1