From: Maitreyee Rao maitreye@codeaurora.org

Add trace points across the MSM DP driver to help debug interop issues.

Changes in v3: - Got rid of redundant log messages. - Unstuck colon from printf specifier in various places.

Signed-off-by: Maitreyee Rao maitreye@codeaurora.org --- drivers/gpu/drm/msm/dp/dp_catalog.c | 8 ++++++-- drivers/gpu/drm/msm/dp/dp_ctrl.c | 5 ++++- drivers/gpu/drm/msm/dp/dp_display.c | 14 ++++++++++++++ drivers/gpu/drm/msm/dp/dp_link.c | 17 ++++++++++------- drivers/gpu/drm/msm/dp/dp_power.c | 3 +++ 5 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 32f3575..958d3fa3 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -372,6 +372,7 @@ void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog);

+ DRM_DEBUG_DP("enable=%d\n", enable); if (enable) { /* * To make sure link reg writes happens before other operation, @@ -580,6 +581,7 @@ void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog,

config = (en ? config | intr_mask : config & ~intr_mask);

+ DRM_DEBUG_DP("intr_mask=%#x config=%#x\n", intr_mask, config); dp_write_aux(catalog, REG_DP_DP_HPD_INT_MASK, config & DP_DP_HPD_INT_MASK); } @@ -610,6 +612,7 @@ u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) u32 status;

status = dp_read_aux(catalog, REG_DP_DP_HPD_INT_STATUS); + DRM_DEBUG_DP("aux status: %#x\n", status); status >>= DP_DP_HPD_STATE_STATUS_BITS_SHIFT; status &= DP_DP_HPD_STATE_STATUS_BITS_MASK;

@@ -685,6 +688,7 @@ void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog, /* Make sure to clear the current pattern before starting a new one */ dp_write_link(catalog, REG_DP_STATE_CTRL, 0x0);

+ DRM_DEBUG_DP("pattern: %#x\n", pattern); switch (pattern) { case DP_PHY_TEST_PATTERN_D10_2: dp_write_link(catalog, REG_DP_STATE_CTRL, @@ -745,7 +749,7 @@ void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog, DP_STATE_CTRL_LINK_TRAINING_PATTERN4); break; default: - DRM_DEBUG_DP("No valid test pattern requested:0x%x\n", pattern); + DRM_DEBUG_DP("No valid test pattern requested: %#x\n", pattern); break; } } @@ -928,7 +932,7 @@ void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog) select = dp_catalog->audio_data; acr_ctrl = select << 4 | BIT(31) | BIT(8) | BIT(14);

- DRM_DEBUG_DP("select = 0x%x, acr_ctrl = 0x%x\n", select, acr_ctrl); + DRM_DEBUG_DP("select: %#x, acr_ctrl: %#x\n", select, acr_ctrl);

dp_write_link(catalog, MMSS_DP_AUDIO_ACR_CTRL, acr_ctrl); } diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 2a8955c..72de71a 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -122,7 +122,7 @@ void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl) IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES)) pr_warn("PUSH_IDLE pattern timedout\n");

- pr_debug("mainlink off done\n"); + DRM_DEBUG_DP("mainlink off done\n"); }

static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) @@ -1013,6 +1013,8 @@ static int dp_ctrl_update_vx_px(struct dp_ctrl_private *ctrl) u32 voltage_swing_level = link->phy_params.v_level; u32 pre_emphasis_level = link->phy_params.p_level;

+ DRM_DEBUG_DP("voltage level: %d emphasis level: %d\n", voltage_swing_level, + pre_emphasis_level); ret = dp_catalog_ctrl_update_vx_px(ctrl->catalog, voltage_swing_level, pre_emphasis_level);

@@ -1384,6 +1386,7 @@ int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset) if (reset) dp_catalog_ctrl_reset(ctrl->catalog);

+ DRM_DEBUG_DP("flip=%d\n", flip); dp_catalog_ctrl_phy_reset(ctrl->catalog); phy_init(phy); dp_catalog_ctrl_enable_irq(ctrl->catalog, true); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index cf9c645..97e21fa 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -275,6 +275,8 @@ static bool dp_display_is_ds_bridge(struct dp_panel *panel)

static bool dp_display_is_sink_count_zero(struct dp_display_private *dp) { + DRM_DEBUG_DP("present=%#x sink_count=%d\n", dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT], + dp->link->sink_count); return dp_display_is_ds_bridge(dp->panel) && (dp->link->sink_count == 0); } @@ -320,6 +322,7 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp,

dp->dp_display.is_connected = hpd;

+ DRM_DEBUG_DP("hpd=%d\n", hpd); dp_display_send_hpd_event(&dp->dp_display);

return 0; @@ -369,6 +372,7 @@ static void dp_display_host_init(struct dp_display_private *dp, int reset) { bool flip = false;

+ DRM_DEBUG_DP("core_initialized=%d\n", dp->core_initialized); if (dp->core_initialized) { DRM_DEBUG_DP("DP core already initialized\n"); return; @@ -483,8 +487,10 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp) { u32 sink_request = dp->link->sink_request;

+ DRM_DEBUG_DP("%d\n", sink_request); if (dp->hpd_state == ST_DISCONNECTED) { if (sink_request & DP_LINK_STATUS_UPDATED) { + DRM_DEBUG_DP("Disconnected sink_count: %d\n", sink_request); DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n"); return -EINVAL; } @@ -509,6 +515,7 @@ static int dp_display_usbpd_attention_cb(struct device *dev) DRM_ERROR("invalid dev\n"); return -EINVAL; } + DRM_DEBUG_DP("sink_request: %d\n", sink_request);

dp = container_of(g_dp_display, struct dp_display_private, dp_display); @@ -523,6 +530,7 @@ static int dp_display_usbpd_attention_cb(struct device *dev) rc = dp_link_process_request(dp->link); if (!rc) { sink_request = dp->link->sink_request; + DRM_DEBUG_DP("hpd_state=%d sink_count=%d\n", dp->hpd_state, sink_request); if (sink_request & DS_PORT_STATUS_CHANGED) rc = dp_display_handle_port_ststus_changed(dp); else @@ -545,6 +553,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex);

state = dp->hpd_state; + DRM_DEBUG_DP("hpd_state=%d\n", state); if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { mutex_unlock(&dp->event_mutex); return 0; @@ -680,6 +689,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) /* start sentinel checking in case of missing uevent */ dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);

+ DRM_DEBUG_DP("hpd_state=%d\n", state); /* signal the disconnect event early to ensure proper teardown */ dp_display_handle_plugged_change(g_dp_display, false);

@@ -738,6 +748,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) if (ret == -ECONNRESET) { /* cable unplugged */ dp->core_initialized = false; } + DRM_DEBUG_DP("hpd_state=%d\n", state);

mutex_unlock(&dp->event_mutex);

@@ -882,6 +893,7 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data)

dp_display = g_dp_display;

+ DRM_DEBUG_DP("sink_count=%d\n", dp->link->sink_count); if (dp_display->power_on) { DRM_DEBUG_DP("Link already setup, return\n"); return 0; @@ -943,6 +955,7 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data)

dp_display->power_on = false;

+ DRM_DEBUG_DP("sink count: %d\n", dp->link->sink_count); return 0; }

@@ -1190,6 +1203,7 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)

hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);

+ DRM_DEBUG_DP("hpd isr status=%#x\n", hpd_isr_status); if (hpd_isr_status & 0x0F) { /* hpd related interrupts */ if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK || diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index be986da..316e8e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -1036,43 +1036,46 @@ int dp_link_process_request(struct dp_link *dp_link)

if (link->request.test_requested == DP_TEST_LINK_EDID_READ) { dp_link->sink_request |= DP_TEST_LINK_EDID_READ; - return ret; + goto out; }

ret = dp_link_process_ds_port_status_change(link); if (!ret) { dp_link->sink_request |= DS_PORT_STATUS_CHANGED; - return ret; + goto out; }

ret = dp_link_process_link_training_request(link); if (!ret) { dp_link->sink_request |= DP_TEST_LINK_TRAINING; - return ret; + goto out; }

ret = dp_link_process_phy_test_pattern_request(link); if (!ret) { dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; - return ret; + goto out; }

ret = dp_link_process_link_status_update(link); if (!ret) { dp_link->sink_request |= DP_LINK_STATUS_UPDATED; - return ret; + goto out; }

if (dp_link_is_video_pattern_requested(link)) { - ret = 0; dp_link->sink_request |= DP_TEST_LINK_VIDEO_PATTERN; + goto out; }

if (dp_link_is_audio_pattern_requested(link)) { dp_link->sink_request |= DP_TEST_LINK_AUDIO_PATTERN; - return -EINVAL; + ret = -EINVAL; + goto out; }

+out: + DRM_DEBUG_DP("sink request=%#x", dp_link->sink_request); return ret; }

diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c index 3961ba4..37c214b 100644 --- a/drivers/gpu/drm/msm/dp/dp_power.c +++ b/drivers/gpu/drm/msm/dp/dp_power.c @@ -208,6 +208,9 @@ static int dp_power_clk_set_rate(struct dp_power_private *power,

int dp_power_clk_status(struct dp_power *dp_power, enum dp_pm_type pm_type) { + DRM_DEBUG_DP("core_clk_on=%d link_clk_on=%d stream_clk_on=%d\n", + dp_power->core_clks_on, dp_power->link_clks_on, dp_power->stream_clks_on); + if (pm_type == DP_CORE_PM) return dp_power->core_clks_on;