Patch "drm/amd/display: fix is_timing_changed() prototype" has been added to the 6.4-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amd/display: fix is_timing_changed() prototype

to the 6.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-fix-is_timing_changed-prototype.patch
and it can be found in the queue-6.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 519979ec4d6c91fc95994142aad297fbfbf24e95
Author: Arnd Bergmann <arnd@xxxxxxxx>
Date:   Tue Apr 18 00:07:18 2023 +0200

    drm/amd/display: fix is_timing_changed() prototype
    
    [ Upstream commit 3306ba4b60b2f3d9ac6bddc587a4d702e1ba2224 ]
    
    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]
    
    is_timing_changed() is actually meant to be a global symbol, but needs
    a proper name and prototype.
    
    Fixes: 17ce8a6907f7 ("drm/amd/display: Add dsc pre-validation in atomic check")
    Reviewed-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
    Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
    Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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 810ab682f424f..46d0a8f57e552 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,
@@ -1422,7 +1421,7 @@ 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 fe1551393b264..ba3eb36e75bc3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1878,7 +1878,7 @@ 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)
@@ -1903,7 +1903,7 @@ 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)
@@ -3528,7 +3528,7 @@ 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 30f0ba05a6e6c..4d93ca9c627b0 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -2226,4 +2226,7 @@ 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_ */



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