From: Bing Guo <[email protected]> Why: Function decide_dp_link_settings() loops infinitely when required bandwidth can't be supported.
How: Check the required bandwidth against verified_link_cap before trying to find a link setting for it. Signed-off-by: Bing Guo <[email protected]> Reviewed-by: Jun Lei <[email protected]> Acked-by: Anson Jacob <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 5064c216b26a..9e464f4ac95f 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2399,6 +2399,9 @@ static bool decide_dp_link_settings(struct dc_link *link, struct dc_link_setting initial_link_setting; uint32_t link_bw; + if (req_bw > dc_link_bandwidth_kbps(link, &link->verified_link_cap)) + return false; + /* search for the minimum link setting that: * 1. is supported according to the link training result * 2. could support the b/w requested by the timing -- 2.25.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
