6.6-stable review patch. If anyone has any objections, please let me know.
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From: Wayne Lin Wayne.Lin@amd.com
[ Upstream commit deb24e64c8881c462b29e2c69afd9e6669058be5 ]
[Why & How] Observe that we try to access DPCD 0x600h of disconnected DP ports. In order not to wasting time on retrying these ports, call dpcd_write_rx_power_ctrl() after checking its connection status.
Reviewed-by: Aurabindo Pillai aurabindo.pillai@amd.com Signed-off-by: Wayne Lin Wayne.Lin@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c index 9b470812d96a..2ce2d9ff7568 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c @@ -137,7 +137,8 @@ void link_blank_dp_stream(struct dc_link *link, bool hw_init) } }
- if ((!link->wa_flags.dp_keep_receiver_powered) || hw_init) + if (((!link->wa_flags.dp_keep_receiver_powered) || hw_init) && + (link->type != dc_connection_none)) dpcd_write_rx_power_ctrl(link, false); } }