From: Qingqing Zhuo <[email protected]> [ Upstream commit c4152b297d56d3696ad0a9003169bc5b98ad7b72 ]
[Why] HPD disable and enable sequences are not mutually exclusive on Linux. For HPDs that spans over 1s (i.e. HPD low = 1s), part of the disable sequence (specifically, a request to SMU to lower refclk) could come right before the call to PHY enable, causing DMUB to access an unresponsive PHY and thus a hard hang on the system. [How] Disable 48mhz refclk off on native DP. Reviewed-by: Hersen Wu <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Signed-off-by: Qingqing Zhuo <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index 75ba86f951f8..7bbedb6b4a9e 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -66,9 +66,11 @@ int rn_get_active_display_cnt_wa( for (i = 0; i < context->stream_count; i++) { const struct dc_stream_state *stream = context->streams[i]; + /* Extend the WA to DP for Linux*/ if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A || stream->signal == SIGNAL_TYPE_DVI_SINGLE_LINK || - stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK) + stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK || + stream->signal == SIGNAL_TYPE_DISPLAY_PORT) tmds_present = true; } -- 2.30.2
