From: Suraj Kandpal Date: Wed, 22 Jan 2025 05:33:58 +0000 (+0530) Subject: drm/i915/lttpr: Enable Extended Wake Timeout X-Git-Tag: v6.15-rc1~120^2~20^2~54 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=242d9bf59a0a8293acf3e67264875abd0b573614;p=thirdparty%2Flinux.git drm/i915/lttpr: Enable Extended Wake Timeout Usually retimers take around 30 to 40ms to exit all devices from sleep state. Extended wake timeout mechanism helps to give that additional time. --v2 -Grant the requested time only if greater than 1ms [Arun/Jani] -Reframe commit message [Arun] --v3 -Move the function to drm_core [Dmitry/Jani] Spec: DP v2.1 Section 3.6.12.3 Signed-off-by: Suraj Kandpal Reviewed-by: Arun R Murthy Acked-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20250122053358.1545039-4-suraj.kandpal@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 49b5cc01ce40a..a70e7f263a899 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2546,6 +2546,7 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state, { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); bool is_mst = intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST); + bool transparent_mode; intel_dp_set_link_params(intel_dp, crtc_state->port_clock, @@ -2600,6 +2601,9 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state, if (!is_mst) intel_dp_set_power(intel_dp, DP_SET_POWER_D0); + transparent_mode = intel_dp_lttpr_transparent_mode_enabled(intel_dp); + drm_dp_lttpr_wake_timeout_setup(&intel_dp->aux, transparent_mode); + intel_dp_configure_protocol_converter(intel_dp, crtc_state); if (!is_mst) intel_dp_sink_enable_decompression(state, 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 397cc4ebae526..c911d4a19e624 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -127,7 +127,7 @@ intel_dp_set_lttpr_transparent_mode(struct intel_dp *intel_dp, bool enable) return true; } -static bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp) +bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp) { return intel_dp->lttpr_common_caps[DP_PHY_REPEATER_MODE - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV] == diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.h b/drivers/gpu/drm/i915/display/intel_dp_link_training.h index 2066b91467622..46614124569f3 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.h +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.h @@ -15,6 +15,7 @@ struct intel_dp; int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]); int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp); +bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp); void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, int link_rate, bool is_vrr);