From: Imre Deak Date: Mon, 8 Jul 2024 19:00:26 +0000 (+0300) Subject: drm/i915/dp: Reset cached LTTPR count if number of LTTPRs is unsupported X-Git-Tag: v6.12-rc1~126^2~22^2~66 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4613aa66e42ba1b0c896495a207b3b26e94e44d5;p=thirdparty%2Fkernel%2Flinux.git drm/i915/dp: Reset cached LTTPR count if number of LTTPRs is unsupported After detection the cached LTTPR count can be checked to determine if LTTPRs in non-transparent mode were detected. Reset the cached LTTPR count if the reported number of LTTPRs is invalid to ensure the above checks work as expected. Reviewed-by: Ville Syrjälä Reviewed-by: Ankit Nautiyal Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20240708190029.271247-4-imre.deak@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index d044c8e36bb3d..56b9c5cb1254d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -174,7 +174,7 @@ static int intel_dp_init_lttpr_phys(struct intel_dp *intel_dp, const u8 dpcd[DP_ * still taking into account any LTTPR common lane- rate/count limits. */ if (lttpr_count < 0) - return 0; + goto out_reset_lttpr_count; if (!intel_dp_set_lttpr_transparent_mode(intel_dp, false)) { lt_dbg(intel_dp, DP_PHY_DPRX,