From: Ivan Lipski <[email protected]> [ Upstream commit d18ecfee5187e3b2dbff7e67dda8b2f54ff5231c ]
[Why&How] If we don't do that we make DSC decisions based on random inputs, which might result in disallowing DSC when the monitor and HW support it. Reviewed-by: Harry Wentland <[email protected]> Signed-off-by: Ivan Lipski <[email protected]> Signed-off-by: Harry Wentland <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- LLM Generated explanations, may be completely bogus: The background searches finished and matched the earlier analysis: - **Fix not in this tree:** `git log` for `Initialize dsc_caps` / `dsc_caps = {0}` returned nothing — the patch isn’t in v6.18.44 yet, but the bug is still there (`struct dsc_dec_dpcd_caps dsc_caps;` at line 7168). - **b4 dig:** No result, since the commit isn’t present locally to look up. **Verdict stands: YES** for backport to this 6.18.y tree — one-line zero-init fix for uninitialized DSC caps used during mode setup on AMDGPU. drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 4f53297786623..8445b13549c17 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7165,7 +7165,7 @@ create_stream_for_sink(struct drm_connector *connector, int preferred_refresh = 0; enum color_transfer_func tf = TRANSFER_FUNC_UNKNOWN; #if defined(CONFIG_DRM_AMD_DC_FP) - struct dsc_dec_dpcd_caps dsc_caps; + struct dsc_dec_dpcd_caps dsc_caps = {0}; #endif struct dc_link *link = NULL; struct dc_sink *sink = NULL; -- 2.53.0
