Add a helper for getting the DP PHY name. In the interest of caller simplicity and to avoid allocations and passing in of buffers, duplicate the const strings to return. It's a minor penalty to pay for simplicity in all the call sites.
Cc: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com --- drivers/gpu/drm/drm_dp_helper.c | 21 +++++++++++++++++++++ include/drm/drm_dp_helper.h | 2 ++ 2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index ada0a1ff262d..2c36fad88781 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -314,6 +314,27 @@ void drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux, } EXPORT_SYMBOL(drm_dp_link_train_channel_eq_delay);
+const char *drm_dp_phy_name(enum drm_dp_phy dp_phy) +{ + static const char * const phy_names[] = { + [DP_PHY_DPRX] = "DPRX", + [DP_PHY_LTTPR1] = "LTTPR 1", + [DP_PHY_LTTPR2] = "LTTPR 2", + [DP_PHY_LTTPR3] = "LTTPR 3", + [DP_PHY_LTTPR4] = "LTTPR 4", + [DP_PHY_LTTPR5] = "LTTPR 5", + [DP_PHY_LTTPR6] = "LTTPR 6", + [DP_PHY_LTTPR7] = "LTTPR 7", + [DP_PHY_LTTPR8] = "LTTPR 8", + }; + + if (dp_phy < 0 || dp_phy >= ARRAY_SIZE(phy_names)) + return "<INVALID DP PHY>"; + + return phy_names[dp_phy]; +} +EXPORT_SYMBOL(drm_dp_phy_name); + void drm_dp_lttpr_link_train_clock_recovery_delay(void) { usleep_range(100, 200); diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index afdf7f4183f9..39a249d99a51 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -2132,6 +2132,8 @@ bool drm_dp_read_sink_count_cap(struct drm_connector *connector, const struct drm_dp_desc *desc); int drm_dp_read_sink_count(struct drm_dp_aux *aux);
+const char *drm_dp_phy_name(enum drm_dp_phy dp_phy); + int drm_dp_read_lttpr_common_caps(struct drm_dp_aux *aux, u8 caps[DP_LTTPR_COMMON_CAP_SIZE]); int drm_dp_read_lttpr_phy_caps(struct drm_dp_aux *aux,
Drop the local intel_dp_phy_name() function, and replace with drm_dp_phy_name(). This lets us drop a number of local buffers.
v2: Rebase
Cc: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com # v1 Signed-off-by: Jani Nikula jani.nikula@intel.com --- .../drm/i915/display/intel_dp_link_training.c | 83 ++++++++----------- 1 file changed, 36 insertions(+), 47 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 a72f2dc93718..81f93733fcc5 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -37,17 +37,6 @@ static void intel_dp_reset_lttpr_count(struct intel_dp *intel_dp) DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV] = 0; }
-static const char *intel_dp_phy_name(enum drm_dp_phy dp_phy, - char *buf, size_t buf_size) -{ - if (dp_phy == DP_PHY_DPRX) - snprintf(buf, buf_size, "DPRX"); - else - snprintf(buf, buf_size, "LTTPR %d", dp_phy - DP_PHY_LTTPR1 + 1); - - return buf; -} - static u8 *intel_dp_lttpr_phy_caps(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy) { @@ -59,20 +48,19 @@ static void intel_dp_read_lttpr_phy_caps(struct intel_dp *intel_dp, { 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]; - - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name));
if (drm_dp_read_lttpr_phy_caps(&intel_dp->aux, dp_phy, phy_caps) < 0) { drm_dbg_kms(&dp_to_i915(intel_dp)->drm, "[ENCODER:%d:%s][%s] failed to read the PHY caps\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return; }
drm_dbg_kms(&dp_to_i915(intel_dp)->drm, "[ENCODER:%d:%s][%s] PHY capabilities: %*ph\n", - encoder->base.base.id, encoder->base.name, phy_name, + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy), (int)sizeof(intel_dp->lttpr_phy_caps[0]), phy_caps); } @@ -406,14 +394,13 @@ intel_dp_get_adjust_train(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); - char phy_name[10]; int lane;
if (intel_dp_is_uhbr(crtc_state)) { drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] 128b/132b, lanes: %d, " "TX FFE request: " TRAIN_REQ_FMT "\n", encoder->base.base.id, encoder->base.name, - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)), + drm_dp_phy_name(dp_phy), crtc_state->lane_count, TRAIN_REQ_TX_FFE_ARGS(link_status)); } else { @@ -421,7 +408,7 @@ intel_dp_get_adjust_train(struct intel_dp *intel_dp, "vswing request: " TRAIN_REQ_FMT ", " "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)), + drm_dp_phy_name(dp_phy), crtc_state->lane_count, TRAIN_REQ_VSWING_ARGS(link_status), TRAIN_REQ_PREEMPH_ARGS(link_status)); @@ -486,13 +473,12 @@ intel_dp_program_link_training_pattern(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); 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(&i915->drm, "[ENCODER:%d:%s][%s] Using DP training pattern TPS%c\n", encoder->base.base.id, encoder->base.name, - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)), + drm_dp_phy_name(dp_phy), dp_training_pattern_name(train_pat));
intel_dp->set_link_train(intel_dp, crtc_state, dp_train_pat); @@ -529,13 +515,12 @@ void intel_dp_set_signal_levels(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); - char phy_name[10];
if (intel_dp_is_uhbr(crtc_state)) { drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] 128b/132b, lanes: %d, " "TX FFE presets: " TRAIN_SET_FMT "\n", encoder->base.base.id, encoder->base.name, - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)), + drm_dp_phy_name(dp_phy), crtc_state->lane_count, TRAIN_SET_TX_FFE_ARGS(intel_dp->train_set)); } else { @@ -543,7 +528,7 @@ void intel_dp_set_signal_levels(struct intel_dp *intel_dp, "vswing levels: " TRAIN_SET_FMT ", " "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)), + drm_dp_phy_name(dp_phy), crtc_state->lane_count, TRAIN_SET_VSWING_ARGS(intel_dp->train_set), TRAIN_SET_PREEMPH_ARGS(intel_dp->train_set)); @@ -715,12 +700,11 @@ intel_dp_dump_link_status(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 *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)), + drm_dp_phy_name(dp_phy), link_status[0], link_status[1], link_status[2], link_status[3], link_status[4], link_status[5]); } @@ -740,21 +724,19 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, int voltage_tries, cr_tries, max_cr_tries; u8 link_status[DP_LINK_STATUS_SIZE]; bool max_vswing_reached = false; - char phy_name[10]; int delay_us;
delay_us = drm_dp_read_clock_recovery_delay(&intel_dp->aux, intel_dp->dpcd, dp_phy, intel_dp_is_uhbr(crtc_state));
- 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, "[ENCODER:%d:%s][%s] Failed to enable link training\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return false; }
@@ -778,14 +760,16 @@ 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, "[ENCODER:%d:%s][%s] Failed to get link status\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return false; }
if (drm_dp_clock_recovery_ok(link_status, crtc_state->lane_count)) { drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Clock recovery OK\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return true; }
@@ -793,7 +777,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Same voltage tried 5 times\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return false; }
@@ -801,7 +786,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Max Voltage Swing reached\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return false; }
@@ -811,7 +797,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, if (!intel_dp_update_link_train(intel_dp, crtc_state, dp_phy)) { drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to update link training\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); return false; }
@@ -829,7 +816,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp, intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed clock recovery %d times, giving up!\n", - encoder->base.base.id, encoder->base.name, phy_name, max_cr_tries); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy), max_cr_tries);
return false; } @@ -907,15 +895,12 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, u32 training_pattern; u8 link_status[DP_LINK_STATUS_SIZE]; bool channel_eq = false; - char phy_name[10]; int delay_us;
delay_us = drm_dp_read_channel_eq_delay(&intel_dp->aux, intel_dp->dpcd, dp_phy, intel_dp_is_uhbr(crtc_state));
- 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 */ if (training_pattern != DP_TRAINING_PATTERN_4) @@ -927,7 +912,7 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to start channel equalization\n", encoder->base.base.id, encoder->base.name, - phy_name); + drm_dp_phy_name(dp_phy)); return false; }
@@ -938,7 +923,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, link_status) < 0) { drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to get link status\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); break; }
@@ -949,7 +935,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Clock recovery check failed, cannot " "continue channel equalization\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); break; }
@@ -958,7 +945,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, channel_eq = true; 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); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); break; }
@@ -968,7 +956,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, if (!intel_dp_update_link_train(intel_dp, crtc_state, dp_phy)) { drm_err(&i915->drm, "[ENCODER:%d:%s][%s] Failed to update link training\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); break; } } @@ -978,7 +967,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp, intel_dp_dump_link_status(intel_dp, dp_phy, link_status); drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s][%s] Channel equalization failed 5 times\n", - encoder->base.base.id, encoder->base.name, phy_name); + encoder->base.base.id, encoder->base.name, + drm_dp_phy_name(dp_phy)); }
return channel_eq; @@ -1026,7 +1016,6 @@ intel_dp_link_train_phy(struct intel_dp *intel_dp, { struct intel_connector *connector = intel_dp->attached_connector; struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; - char phy_name[10]; bool ret = false;
if (!intel_dp_link_training_clock_recovery(intel_dp, crtc_state, dp_phy)) @@ -1042,7 +1031,7 @@ intel_dp_link_train_phy(struct intel_dp *intel_dp, "[CONNECTOR:%d:%s][ENCODER:%d:%s][%s] Link Training %s at link rate = %d, lane count = %d\n", connector->base.base.id, connector->base.name, encoder->base.base.id, encoder->base.name, - intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name)), + drm_dp_phy_name(dp_phy), ret ? "passed" : "failed", crtc_state->port_clock, crtc_state->lane_count);
dri-devel@lists.freedesktop.org
-
Jani Nikula