On Mon, Oct 04, 2021 at 08:05:34PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Unify all debug prints during link training to include information
> on both the encoder and the LTTPR. We unify the format to something
> like "[ENCODER:1:FOO][LTTPR 1] Something something". Though not
> sure if those brackets around the dp_phy just make it look like
> line noise? I'll accept suggestions on better formatting.
>
> I'm slightly on the fence about also including the connector,
> but technically only the DPRX is the SST connector (ie.
> intel_dp->attached_connector). I suppose you could think of it
> as the branch device/whatever in the topology, and we're training
> the link leading to it. So that could argue for its inclusion.
> But it's all getting a bit long alrady, so not going to do it
> I think.
Imo including the connector info eventually would be good to be able to
match these lines with those only showing the connector, or connectors
in i915_display_info etc.
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Imre Deak <imre.d...@intel.com>
> ---
> .../drm/i915/display/intel_dp_link_training.c | 167 +++++++++++-------
> 1 file changed, 106 insertions(+), 61 deletions(-)
>
> 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 5657be1461ec..18f4b469766e 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> @@ -25,15 +25,6 @@
> #include "intel_dp.h"
> #include "intel_dp_link_training.h"
>
> -static void
> -intel_dp_dump_link_status(struct drm_device *drm,
> - const u8 link_status[DP_LINK_STATUS_SIZE])
> -{
> - drm_dbg_kms(drm,
> - "ln0_1:0x%x ln2_3:0x%x align:0x%x sink:0x%x adj_req0_1:0x%x
> adj_req2_3:0x%x\n",
> - link_status[0], link_status[1], link_status[2],
> - link_status[3], link_status[4], link_status[5]);
> -}
>
> static void intel_dp_reset_lttpr_common_caps(struct intel_dp *intel_dp)
> {
> @@ -66,6 +57,7 @@ static u8 *intel_dp_lttpr_phy_caps(struct intel_dp
> *intel_dp,
> static void intel_dp_read_lttpr_phy_caps(struct intel_dp *intel_dp,
> enum drm_dp_phy dp_phy)
> {
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> u8 *phy_caps = intel_dp_lttpr_phy_caps(intel_dp, dp_phy);
> char phy_name[10];
>
> @@ -73,21 +65,22 @@ static void intel_dp_read_lttpr_phy_caps(struct intel_dp
> *intel_dp,
>
> if (drm_dp_read_lttpr_phy_caps(&intel_dp->aux, dp_phy, phy_caps) < 0) {
> drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "failed to read the PHY caps for %s\n",
> - phy_name);
> + "[ENCODER:%d:%s][%s] failed to read the PHY caps\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return;
> }
>
> drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "%s PHY capabilities: %*ph\n",
> - phy_name,
> + "[ENCODER:%d:%s][%s] PHY capabilities: %*ph\n",
> + encoder->base.base.id, encoder->base.name, phy_name,
> (int)sizeof(intel_dp->lttpr_phy_caps[0]),
> phy_caps);
> }
>
> static bool intel_dp_read_lttpr_common_caps(struct intel_dp *intel_dp)
> {
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
>
> if (intel_dp_is_edp(intel_dp))
> return false;
> @@ -104,7 +97,8 @@ static bool intel_dp_read_lttpr_common_caps(struct
> intel_dp *intel_dp)
> goto reset_caps;
>
> drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "LTTPR common capabilities: %*ph\n",
> + "[ENCODER:%d:%s] LTTPR common capabilities: %*ph\n",
> + encoder->base.base.id, encoder->base.name,
> (int)sizeof(intel_dp->lttpr_common_caps),
> intel_dp->lttpr_common_caps);
>
> @@ -130,6 +124,8 @@ intel_dp_set_lttpr_transparent_mode(struct intel_dp
> *intel_dp, bool enable)
>
> static int intel_dp_init_lttpr(struct intel_dp *intel_dp)
> {
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> int lttpr_count;
> int i;
>
> @@ -161,8 +157,9 @@ static int intel_dp_init_lttpr(struct intel_dp *intel_dp)
> return 0;
>
> if (!intel_dp_set_lttpr_transparent_mode(intel_dp, false)) {
> - drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "Switching to LTTPR non-transparent LT mode failed,
> fall-back to transparent mode\n");
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s] Switching to LTTPR non-transparent
> LT mode failed, fall-back to transparent mode\n",
> + encoder->base.base.id, encoder->base.name);
>
> intel_dp_set_lttpr_transparent_mode(intel_dp, true);
> intel_dp_reset_lttpr_count(intel_dp);
> @@ -366,17 +363,18 @@ intel_dp_get_adjust_train(struct intel_dp *intel_dp,
> const u8 link_status[DP_LINK_STATUS_SIZE])
> {
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> char phy_name[10];
> int lane;
>
> - drm_dbg_kms(encoder->base.dev, "[ENCODER:%d:%s] lanes: %d, "
> + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] lanes: %d, "
> "vswing request: " TRAIN_REQ_FMT ", "
> - "pre-emphasis request: " TRAIN_REQ_FMT ", at %s\n",
> + "pre-emphasis request: " TRAIN_REQ_FMT "\n",
> encoder->base.base.id, encoder->base.name,
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)),
> crtc_state->lane_count,
> TRAIN_REQ_VSWING_ARGS(link_status),
> - TRAIN_REQ_PREEMPH_ARGS(link_status),
> - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)));
> + TRAIN_REQ_PREEMPH_ARGS(link_status));
>
> for (lane = 0; lane < 4; lane++)
> intel_dp->train_set[lane] =
> @@ -435,16 +433,16 @@ intel_dp_program_link_training_pattern(struct intel_dp
> *intel_dp,
> u8 dp_train_pat)
> {
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> - struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> u8 train_pat = intel_dp_training_pattern_symbol(dp_train_pat);
> char phy_name[10];
>
> if (train_pat != DP_TRAINING_PATTERN_DISABLE)
> - drm_dbg_kms(&dev_priv->drm,
> - "[ENCODER:%d:%s] Using DP training pattern TPS%c,
> at %s\n",
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s][%s] Using DP training pattern
> TPS%c\n",
> encoder->base.base.id, encoder->base.name,
> - dp_training_pattern_name(train_pat),
> - intel_dp_phy_name(dp_phy, phy_name,
> sizeof(phy_name)));
> + intel_dp_phy_name(dp_phy, phy_name,
> sizeof(phy_name)),
> + dp_training_pattern_name(train_pat));
>
> intel_dp->set_link_train(intel_dp, crtc_state, dp_train_pat);
> }
> @@ -472,17 +470,17 @@ void intel_dp_set_signal_levels(struct intel_dp
> *intel_dp,
> enum drm_dp_phy dp_phy)
> {
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> - struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> char phy_name[10];
>
> - drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] lanes: %d, "
> + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] lanes: %d, "
> "vswing levels: " TRAIN_SET_FMT ", "
> - "pre-emphasis levels: " TRAIN_SET_FMT ", at %s\n",
> + "pre-emphasis levels: " TRAIN_SET_FMT "\n",
> encoder->base.base.id, encoder->base.name,
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)),
> crtc_state->lane_count,
> TRAIN_SET_VSWING_ARGS(intel_dp->train_set),
> - TRAIN_SET_PREEMPH_ARGS(intel_dp->train_set),
> - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)));
> + TRAIN_SET_PREEMPH_ARGS(intel_dp->train_set));
>
> if (intel_dp_phy_is_downstream_of_source(intel_dp, dp_phy))
> encoder->set_signal_levels(encoder, crtc_state);
> @@ -554,7 +552,8 @@ static bool
> intel_dp_prepare_link_train(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state)
> {
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> u8 link_config[2];
> u8 link_bw, rate_select;
>
> @@ -566,10 +565,12 @@ intel_dp_prepare_link_train(struct intel_dp *intel_dp,
>
> if (link_bw)
> drm_dbg_kms(&i915->drm,
> - "Using LINK_BW_SET value %02x\n", link_bw);
> + "[ENCODER:%d:%s] Using LINK_BW_SET value %02x\n",
> + encoder->base.base.id, encoder->base.name, link_bw);
> else
> drm_dbg_kms(&i915->drm,
> - "Using LINK_RATE_SET value %02x\n", rate_select);
> + "[ENCODER:%d:%s] Using LINK_RATE_SET value %02x\n",
> + encoder->base.base.id, encoder->base.name,
> rate_select);
>
> /* Write the link configuration data */
> link_config[0] = link_bw;
> @@ -619,6 +620,22 @@ static bool intel_dp_adjust_request_changed(int
> lane_count,
> return false;
> }
>
> +static void
> +intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy,
> + const u8 link_status[DP_LINK_STATUS_SIZE])
> +{
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + char phy_name[10];
> +
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s][%s] ln0_1:0x%x ln2_3:0x%x align:0x%x
> sink:0x%x adj_req0_1:0x%x adj_req2_3:0x%x\n",
> + encoder->base.base.id, encoder->base.name,
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)),
> + link_status[0], link_status[1], link_status[2],
> + link_status[3], link_status[4], link_status[5]);
> +}
> +
> /*
> * Perform the link training clock recovery phase on the given DP PHY using
> * training pattern 1.
> @@ -628,16 +645,21 @@ intel_dp_link_training_clock_recovery(struct intel_dp
> *intel_dp,
> const struct intel_crtc_state *crtc_state,
> enum drm_dp_phy dp_phy)
> {
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> u8 old_link_status[DP_LINK_STATUS_SIZE] = {};
> int voltage_tries, cr_tries, max_cr_tries;
> bool max_vswing_reached = false;
> + char phy_name[10];
> +
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name));
>
> /* clock recovery */
> if (!intel_dp_reset_link_train(intel_dp, crtc_state, dp_phy,
> DP_TRAINING_PATTERN_1 |
> DP_LINK_SCRAMBLING_DISABLE)) {
> - drm_err(&i915->drm, "failed to enable link training\n");
> + drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to enable link
> training\n",
> + encoder->base.base.id, encoder->base.name, phy_name);
> return false;
> }
>
> @@ -662,23 +684,29 @@ intel_dp_link_training_clock_recovery(struct intel_dp
> *intel_dp,
>
> if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy,
> link_status) < 0) {
> - drm_err(&i915->drm, "failed to get link status\n");
> + drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to get
> link status\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return false;
> }
>
> if (drm_dp_clock_recovery_ok(link_status,
> crtc_state->lane_count)) {
> - drm_dbg_kms(&i915->drm, "clock recovery OK\n");
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s][%s] Clock recovery OK\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return true;
> }
>
> if (voltage_tries == 5) {
> drm_dbg_kms(&i915->drm,
> - "Same voltage tried 5 times\n");
> + "[ENCODER:%d:%s][%s] Same voltage tried 5
> times\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return false;
> }
>
> if (max_vswing_reached) {
> - drm_dbg_kms(&i915->drm, "Max Voltage Swing reached\n");
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s][%s] Max Voltage Swing
> reached\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return false;
> }
>
> @@ -687,7 +715,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp
> *intel_dp,
> link_status);
> if (!intel_dp_update_link_train(intel_dp, crtc_state, dp_phy)) {
> drm_err(&i915->drm,
> - "failed to update link training\n");
> + "[ENCODER:%d:%s][%s] Failed to update link
> training\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> return false;
> }
>
> @@ -701,10 +730,12 @@ intel_dp_link_training_clock_recovery(struct intel_dp
> *intel_dp,
>
> if (intel_dp_link_max_vswing_reached(intel_dp, crtc_state))
> max_vswing_reached = true;
> -
> }
> +
> drm_err(&i915->drm,
> - "Failed clock recovery %d times, giving up!\n", max_cr_tries);
> + "[ENCODER:%d:%s][%s] Failed clock recovery %d times, giving
> up!\n",
> + encoder->base.base.id, encoder->base.name, phy_name,
> max_cr_tries);
> +
> return false;
> }
>
> @@ -788,11 +819,15 @@ intel_dp_link_training_channel_equalization(struct
> intel_dp *intel_dp,
> const struct intel_crtc_state
> *crtc_state,
> enum drm_dp_phy dp_phy)
> {
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> int tries;
> u32 training_pattern;
> u8 link_status[DP_LINK_STATUS_SIZE];
> bool channel_eq = false;
> + char phy_name[10];
> +
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name));
>
> training_pattern = intel_dp_training_pattern(intel_dp, crtc_state,
> dp_phy);
> /* Scrambling is disabled for TPS2/3 and enabled for TPS4 */
> @@ -802,7 +837,10 @@ intel_dp_link_training_channel_equalization(struct
> intel_dp *intel_dp,
> /* channel equalization */
> if (!intel_dp_set_link_train(intel_dp, crtc_state, dp_phy,
> training_pattern)) {
> - drm_err(&i915->drm, "failed to start channel equalization\n");
> + drm_err(&i915->drm,
> + "[ENCODER:%d:%s][%s] Failed to start channel
> equalization\n",
> + encoder->base.base.id, encoder->base.name,
> + phy_name);
> return false;
> }
>
> @@ -812,25 +850,28 @@ intel_dp_link_training_channel_equalization(struct
> intel_dp *intel_dp,
> if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy,
> link_status) < 0) {
> drm_err(&i915->drm,
> - "failed to get link status\n");
> + "[ENCODER:%d:%s][%s] Failed to get link
> status\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> break;
> }
>
> /* Make sure clock is still ok */
> if (!drm_dp_clock_recovery_ok(link_status,
> crtc_state->lane_count)) {
> - intel_dp_dump_link_status(&i915->drm, link_status);
> + intel_dp_dump_link_status(intel_dp, dp_phy,
> link_status);
> drm_dbg_kms(&i915->drm,
> - "Clock recovery check failed, cannot "
> - "continue channel equalization\n");
> + "[ENCODER:%d:%s][%s] Clock recovery check
> failed, cannot "
> + "continue channel equalization\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> break;
> }
>
> if (drm_dp_channel_eq_ok(link_status,
> crtc_state->lane_count)) {
> channel_eq = true;
> - drm_dbg_kms(&i915->drm, "Channel EQ done. DP Training "
> - "successful\n");
> + drm_dbg_kms(&i915->drm,
> + "[ENCODER:%d:%s][%s] Channel EQ done. DP
> Training successful\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> break;
> }
>
> @@ -839,16 +880,18 @@ intel_dp_link_training_channel_equalization(struct
> intel_dp *intel_dp,
> link_status);
> if (!intel_dp_update_link_train(intel_dp, crtc_state, dp_phy)) {
> drm_err(&i915->drm,
> - "failed to update link training\n");
> + "[ENCODER:%d:%s][%s] Failed to update link
> training\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> break;
> }
> }
>
> /* Try 5 times, else fail and try at lower BW */
> if (tries == 5) {
> - intel_dp_dump_link_status(&i915->drm, link_status);
> + intel_dp_dump_link_status(intel_dp, dp_phy, link_status);
> drm_dbg_kms(&i915->drm,
> - "Channel equalization failed 5 times\n");
> + "[ENCODER:%d:%s][%s] Channel equalization failed 5
> times\n",
> + encoder->base.base.id, encoder->base.name,
> phy_name);
> }
>
> return channel_eq;
> @@ -894,7 +937,7 @@ intel_dp_link_train_phy(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state,
> enum drm_dp_phy dp_phy)
> {
> - struct intel_connector *intel_connector = intel_dp->attached_connector;
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> char phy_name[10];
> bool ret = false;
>
> @@ -908,12 +951,11 @@ intel_dp_link_train_phy(struct intel_dp *intel_dp,
>
> out:
> drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "[CONNECTOR:%d:%s] Link Training %s at link rate = %d, lane
> count = %d, at %s\n",
> - intel_connector->base.base.id,
> - intel_connector->base.name,
> + "[ENCODER:%d:%s][%s] Link Training %s at link rate = %d,
> lane count = %d\n",
> + encoder->base.base.id, encoder->base.name,
> + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)),
> ret ? "passed" : "failed",
> - crtc_state->port_clock, crtc_state->lane_count,
> - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)));
> + crtc_state->port_clock, crtc_state->lane_count);
>
> return ret;
> }
> @@ -922,10 +964,13 @@ static void
> intel_dp_schedule_fallback_link_training(struct intel_dp *intel_dp,
> const struct
> intel_crtc_state *crtc_state)
> {
> struct intel_connector *intel_connector = intel_dp->attached_connector;
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
>
> if (intel_dp->hobl_active) {
> drm_dbg_kms(&dp_to_i915(intel_dp)->drm,
> - "Link Training failed with HOBL active, not
> enabling it from now on");
> + "[ENCODER:%d:%s] Link Training failed with HOBL
> active, "
> + "not enabling it from now on",
> + encoder->base.base.id, encoder->base.name);
> intel_dp->hobl_failed = true;
> } else if (intel_dp_get_link_train_fallback_values(intel_dp,
>
> crtc_state->port_clock,
> --
> 2.32.0
>
