[PATCH 09/16] drm/amd/display: print messages when programming shaper/3dlut fails

[<Roman.Li@xxxxxxx>]

From: Alex Hung <alex.hung@xxxxxxx>

[WHAT & HOW]
Print error messages when programming shaper lut or 3dlut fails.

This fixes 5 UNUSED_VALUE issues reported by Coverity.

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
Signed-off-by: Alex Hung <alex.hung@xxxxxxx>
Signed-off-by: Roman Li <roman.li@xxxxxxx>
---
 .../gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c |  7 +++++++
 .../gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c | 13 +++++++------
 .../display/dc/link/protocols/link_dp_training.c    | 11 +++++++++++
 3 files changed, 25 insertions(+), 6 deletions(-)

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 9e1777f727c4..e89ebfda4873 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
@@ -245,6 +245,7 @@ static bool dcn30_set_mpc_shaper_3dlut(struct pipe_ctx *pipe_ctx,
 {
 	struct dpp *dpp_base = pipe_ctx->plane_res.dpp;
 	int mpcc_id = pipe_ctx->plane_res.hubp->inst;
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
 	struct mpc *mpc = pipe_ctx->stream_res.opp->ctx->dc->res_pool->mpc;
 	bool result = false;
 	int acquired_rmu = 0;
@@ -283,8 +284,14 @@ static bool dcn30_set_mpc_shaper_3dlut(struct pipe_ctx *pipe_ctx,
 
 		result = mpc->funcs->program_3dlut(mpc, &stream->lut3d_func->lut_3d,
 						   stream->lut3d_func->state.bits.rmu_mux_num);
+		if (!result)
+			DC_LOG_ERROR("%s: program_3dlut failed\n", __func__);
+
 		result = mpc->funcs->program_shaper(mpc, shaper_lut,
 						    stream->lut3d_func->state.bits.rmu_mux_num);
+		if (!result)
+			DC_LOG_ERROR("%s: program_shaper failed\n", __func__);
+
 	} else {
 		// loop through the available mux and release the requested mpcc_id
 		mpc->funcs->release_rmu(mpc, mpcc_id);
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 119c6d08200f..d7f8b2dcaa6b 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
@@ -439,6 +439,7 @@ bool dcn32_set_mpc_shaper_3dlut(
 {
 	struct dpp *dpp_base = pipe_ctx->plane_res.dpp;
 	int mpcc_id = pipe_ctx->plane_res.hubp->inst;
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
 	struct mpc *mpc = pipe_ctx->stream_res.opp->ctx->dc->res_pool->mpc;
 	bool result = false;
 
@@ -458,13 +459,13 @@ bool dcn32_set_mpc_shaper_3dlut(
 	if (stream->lut3d_func &&
 		stream->lut3d_func->state.bits.initialized == 1) {
 
-		result = mpc->funcs->program_3dlut(mpc,
-								&stream->lut3d_func->lut_3d,
-								mpcc_id);
+		result = mpc->funcs->program_3dlut(mpc,	&stream->lut3d_func->lut_3d, mpcc_id);
+		if (!result)
+			DC_LOG_ERROR("%s: program_3dlut failed\n", __func__);
 
-		result = mpc->funcs->program_shaper(mpc,
-								shaper_lut,
-								mpcc_id);
+		result = mpc->funcs->program_shaper(mpc, shaper_lut, mpcc_id);
+		if (!result)
+			DC_LOG_ERROR("%s: program_shaper failed\n", __func__);
 	}
 
 	return result;
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
index 27b881f947e8..a42c56a57253 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
@@ -1107,9 +1107,13 @@ enum dc_status dpcd_set_link_settings(
 
 	status = core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
 		&downspread.raw, sizeof(downspread));
+	if (status != DC_OK)
+		DC_LOG_ERROR("%s:%d: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed\n", __func__, __LINE__);
 
 	status = core_link_write_dpcd(link, DP_LANE_COUNT_SET,
 		&lane_count_set.raw, 1);
+	if (status != DC_OK)
+		DC_LOG_ERROR("%s:%d: core_link_write_dpcd (DP_LANE_COUNT_SET) failed\n", __func__, __LINE__);
 
 	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13 &&
 			lt_settings->link_settings.use_link_rate_set == true) {
@@ -1125,12 +1129,19 @@ enum dc_status dpcd_set_link_settings(
 					supported_link_rates, sizeof(supported_link_rates));
 		}
 		status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+		if (status != DC_OK)
+			DC_LOG_ERROR("%s:%d: core_link_write_dpcd (DP_LINK_BW_SET) failed\n", __func__, __LINE__);
+
 		status = core_link_write_dpcd(link, DP_LINK_RATE_SET,
 				&lt_settings->link_settings.link_rate_set, 1);
+		if (status != DC_OK)
+			DC_LOG_ERROR("%s:%d: core_link_write_dpcd (DP_LINK_RATE_SET) failed\n", __func__, __LINE__);
 	} else {
 		rate = get_dpcd_link_rate(&lt_settings->link_settings);
 
 		status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+		if (status != DC_OK)
+			DC_LOG_ERROR("%s:%d: core_link_write_dpcd (DP_LINK_BW_SET) failed\n", __func__, __LINE__);
 	}
 
 	if (rate) {
-- 
2.34.1