linux-kernel - [PATCH] drm/amd/display: return status of dmub_srv_get_fw_boot

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Message-Id: <20230420135901.3889747-1-trix@redhat.com>
Date:   Thu, 20 Apr 2023 09:59:01 -0400
From:   Tom Rix <trix@...hat.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, Alvin.Lee2@....com, Jun.Lei@....com,
        qingqing.zhuo@....com, Max.Tseng@....com, Josip.Pavic@....com,
        Eric.Yang2@....com, aurabindo.pillai@....com
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] drm/amd/display: return status of dmub_srv_get_fw_boot_status

gcc with W=1 reports
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:
  In function ‘dc_dmub_srv_optimized_init_done’:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:184:26:
  error: variable ‘dmub’ set but not used [-Werror=unused-but-set-variable]
  184 |         struct dmub_srv *dmub;
      |                          ^~~~

The return status is never set.
It looks like a call to dmub_srv_get_fw_boot_status is missing.

Fixes: 499e4b1c722e ("drm/amd/display: add mechanism to skip DCN init")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
index d15ec32243e2..36d936ab4300 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -182,14 +182,23 @@ bool dc_dmub_srv_cmd_run_list(struct dc_dmub_srv *dc_dmub_srv, unsigned int coun
 bool dc_dmub_srv_optimized_init_done(struct dc_dmub_srv *dc_dmub_srv)
 {
 	struct dmub_srv *dmub;
-	union dmub_fw_boot_status status;
+	struct dc_context *dc_ctx;
+	union dmub_fw_boot_status boot_status;
+	enum dmub_status status;
 
 	if (!dc_dmub_srv || !dc_dmub_srv->dmub)
 		return false;
 
 	dmub = dc_dmub_srv->dmub;
+	dc_ctx = dc_dmub_srv->ctx;
+
+	status = dmub_srv_get_fw_boot_status(dmub, &boot_status);
+	if (status != DMUB_STATUS_OK) {
+		DC_ERROR("Error querying DMUB boot status: error=%d\n", status);
+		return false;
+	}
 
-	return status.bits.optimized_init_done;
+	return boot_status.bits.optimized_init_done;
 }
 
 bool dc_dmub_srv_notify_stream_mask(struct dc_dmub_srv *dc_dmub_srv,
-- 
2.27.0