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From:   Arnd Bergmann <arnd@kernel.org>
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Subject: [PATCH 2/2] drm/amd/display: fix missing=prototypes warnings
Date:   Mon, 17 Apr 2023 23:05:43 +0200
Message-Id: <20230417210602.2614198-2-arnd@kernel.org>
In-Reply-To: <20230417210602.2614198-1-arnd@kernel.org>
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From: Arnd Bergmann <arnd@arndb.de>

Three functions in the amdgpu display driver cause -Wmissing-prototype
warnings:

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:1858:6: error: no previous prototype for 'is_timing_changed' [-Werror=missing-prototypes]
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:210:6: error: no previous prototype for 'is_synaptics_cascaded_panamera' [-Werror=missing-prototypes]
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_optc.c:294:6: error: no previous prototype for 'optc3_wait_drr_doublebuffer_pending_clear' [-Werror=missing-prototypes]

is_timing_changed() is actually meant to be a global symbol, but needs
a proper name and prototype, while the other two can just be made static.

Fixes: 54c7b715b5ef ("drm/amd/display: Add DSC Support for Synaptics Cascaded MST Hub")
Fixes: 17ce8a6907f7 ("drm/amd/display: Add dsc pre-validation in atomic check")
Fixes: 8f0d304d21b3 ("drm/amd/display: Do not commit pipe when updating DRR")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 5 ++---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c           | 6 +++---
 drivers/gpu/drm/amd/display/dc/dc.h                         | 3 +++
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 994ba426ca66..442511061178 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -45,8 +45,7 @@
 #endif
 
 #include "dc/dcn20/dcn20_resource.h"
-bool is_timing_changed(struct dc_stream_state *cur_stream,
-		       struct dc_stream_state *new_stream);
+
 #define PEAK_FACTOR_X1000 1006
 
 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
@@ -1417,7 +1416,7 @@ int pre_validate_dsc(struct drm_atomic_state *state,
 		struct dc_stream_state *stream = dm_state->context->streams[i];
 
 		if (local_dc_state->streams[i] &&
-		    is_timing_changed(stream, local_dc_state->streams[i])) {
+		    dc_is_timing_changed(stream, local_dc_state->streams[i])) {
 			DRM_INFO_ONCE("crtc[%d] needs mode_changed\n", i);
 		} else {
 			int ind = find_crtc_index_in_state_by_stream(state, stream);
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 85d54bfb595c..344533623cb9 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1855,7 +1855,7 @@ bool dc_add_all_planes_for_stream(
 	return add_all_planes_for_stream(dc, stream, &set, 1, context);
 }
 
-bool is_timing_changed(struct dc_stream_state *cur_stream,
+bool dc_is_timing_changed(struct dc_stream_state *cur_stream,
 		       struct dc_stream_state *new_stream)
 {
 	if (cur_stream == NULL)
@@ -1880,7 +1880,7 @@ static bool are_stream_backends_same(
 	if (stream_a == NULL || stream_b == NULL)
 		return false;
 
-	if (is_timing_changed(stream_a, stream_b))
+	if (dc_is_timing_changed(stream_a, stream_b))
 		return false;
 
 	if (stream_a->signal != stream_b->signal)
@@ -3505,7 +3505,7 @@ bool pipe_need_reprogram(
 	if (pipe_ctx_old->stream_res.stream_enc != pipe_ctx->stream_res.stream_enc)
 		return true;
 
-	if (is_timing_changed(pipe_ctx_old->stream, pipe_ctx->stream))
+	if (dc_is_timing_changed(pipe_ctx_old->stream, pipe_ctx->stream))
 		return true;
 
 	if (pipe_ctx_old->stream->dpms_off != pipe_ctx->stream->dpms_off)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 23ee63b98dcd..e7ab6cb3769b 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -2225,4 +2225,7 @@ void dc_process_dmub_dpia_hpd_int_enable(const struct dc *dc,
 /* Disable acc mode Interfaces */
 void dc_disable_accelerated_mode(struct dc *dc);
 
+bool dc_is_timing_changed(struct dc_stream_state *cur_stream,
+		       struct dc_stream_state *new_stream);
+
 #endif /* DC_INTERFACE_H_ */
-- 
2.39.2