cherry-pick 3 patches at chromeos-5.4 to msm-next-staging
Kuogee Hsieh (2): FROMLIST: drm/msm/dp: return correct connection status after suspend FROMLIST: drm/msm/dp: fixes wrong connection state caused by failure of link train
Stephen Boyd (1): FIXUP: FROMLIST: drm/msm/dp: return correct connection status after suspend
drivers/gpu/drm/msm/dp/dp_catalog.c | 13 +++ drivers/gpu/drm/msm/dp/dp_catalog.h | 1 + drivers/gpu/drm/msm/dp/dp_ctrl.c | 5 + drivers/gpu/drm/msm/dp/dp_display.c | 172 ++++++++++++++-------------- drivers/gpu/drm/msm/dp/dp_panel.c | 5 + drivers/gpu/drm/msm/dp/dp_reg.h | 2 + 6 files changed, 115 insertions(+), 83 deletions(-)
At dp_pm_resume, reinitialize both dp host controller and hpd block so that hpd connection can be detected at realtime by reading hpd state status register. Also hpd plug interrupt can be generated accordingly.
Changes in v2: -- use container_of to cast correct dp_display_private pointer at both dp_pm_suspend and dp_pm_resume.
Signed-off-by: Kuogee Hsieh khsieh@codeaurora.org (am from https://lore.kernel.org/patchwork/patch/1312265/) (also found at https://lore.kernel.org/r/20200926203454.13643-1-khsieh@codeaurora.org)
BUG=b:166844571, b:148864048 TEST=On lazor, suspend with DP connected, disconnect cable, resume, see panel is gone from settings
Signed-off-by: Stephen Boyd swboyd@chromium.org Change-Id: Id2f4ec7c8e91ae132c75653f8c40842cef320aaf Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2... Reviewed-by: Sean Paul seanpaul@chromium.org Reviewed-by: Rob Clark robdclark@chromium.org Commit-Queue: Rob Clark robdclark@chromium.org --- drivers/gpu/drm/msm/dp/dp_catalog.c | 13 ++++++ drivers/gpu/drm/msm/dp/dp_catalog.h | 1 + drivers/gpu/drm/msm/dp/dp_display.c | 67 ++++++++++++----------------- drivers/gpu/drm/msm/dp/dp_reg.h | 2 + 4 files changed, 43 insertions(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index b15b4ce4ba35..63c5ada34c21 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -572,6 +572,19 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); }
+u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 status = 0; + + status = dp_read_aux(catalog, REG_DP_DP_HPD_INT_STATUS); + status >>= DP_DP_HPD_STATE_STATUS_BITS_SHIFT; + status &= DP_DP_HPD_STATE_STATUS_BITS_MASK; + + return status; +} + u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 4b7666f1fe6f..6d257dbebf29 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -97,6 +97,7 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, u32 intr_mask, bool en); void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); +u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog); u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 871a69f8f9d0..d431f0ee02bf 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -114,8 +114,6 @@ struct dp_display_private { struct dp_event event_list[DP_EVENT_Q_MAX]; spinlock_t event_lock;
- struct completion resume_comp; - struct dp_audio *audio; };
@@ -509,9 +507,6 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) return 0; }
- if (state == ST_SUSPENDED) - tout = DP_TIMEOUT_NONE; - atomic_set(&dp->hpd_state, ST_CONNECT_PENDING);
hpd->hpd_high = 1; @@ -807,8 +802,6 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data) if (!rc) dp_display->power_on = true;
- /* complete resume_comp regardless it is armed or not */ - complete(&dp->resume_comp); return rc; }
@@ -1160,9 +1153,6 @@ static int dp_display_probe(struct platform_device *pdev) }
mutex_init(&dp->event_mutex); - - init_completion(&dp->resume_comp); - g_dp_display = &dp->dp_display;
/* Store DP audio handle inside DP display */ @@ -1198,18 +1188,40 @@ static int dp_display_remove(struct platform_device *pdev)
static int dp_pm_resume(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); + struct msm_dp *dp_display = platform_get_drvdata(pdev); + struct dp_display_private *dp; + u32 status; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + dp_display_host_init(dp); + + dp_catalog_ctrl_hpd_config(dp->catalog); + + status = dp_catalog_hpd_get_state_status(dp->catalog); + + if (status) { + dp->dp_display.is_connected = true; + } else { + dp->dp_display.is_connected = false; + /* make sure next resume host_init be called */ + dp->core_initialized = false; + } + return 0; }
static int dp_pm_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); - struct dp_display_private *dp = platform_get_drvdata(pdev); + struct msm_dp *dp_display = platform_get_drvdata(pdev); + struct dp_display_private *dp;
- if (!dp) { - DRM_ERROR("DP driver bind failed. Invalid driver data\n"); - return -EINVAL; - } + dp = container_of(dp_display, struct dp_display_private, dp_display); + + if (dp_display->power_on == true) + dp_display_disable(dp, 0);
atomic_set(&dp->hpd_state, ST_SUSPENDED);
@@ -1326,19 +1338,6 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, return 0; }
-static int dp_display_wait4resume_done(struct dp_display_private *dp) -{ - int ret = 0; - - reinit_completion(&dp->resume_comp); - if (!wait_for_completion_timeout(&dp->resume_comp, - WAIT_FOR_RESUME_TIMEOUT_JIFFIES)) { - DRM_ERROR("wait4resume_done timedout\n"); - ret = -ETIMEDOUT; - } - return ret; -} - int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) { int rc = 0; @@ -1368,14 +1367,6 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) }
state = atomic_read(&dp_display->hpd_state); - if (state == ST_SUSPENDED) { - /* start link training */ - dp_add_event(dp_display, EV_HPD_PLUG_INT, 0, 0); - mutex_unlock(&dp_display->event_mutex); - - /* wait until dp interface is up */ - goto resume_done; - }
dp_display_enable(dp_display, 0);
@@ -1397,10 +1388,6 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) mutex_unlock(&dp_display->event_mutex);
return rc; - -resume_done: - dp_display_wait4resume_done(dp_display); - return rc; }
int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder) diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 43042ff90a19..268602803d9a 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -32,6 +32,8 @@ #define DP_DP_IRQ_HPD_INT_ACK (0x00000002) #define DP_DP_HPD_REPLUG_INT_ACK (0x00000004) #define DP_DP_HPD_UNPLUG_INT_ACK (0x00000008) +#define DP_DP_HPD_STATE_STATUS_BITS_MASK (0x0000000F) +#define DP_DP_HPD_STATE_STATUS_BITS_SHIFT (0x1C)
#define REG_DP_DP_HPD_INT_MASK (0x0000000C) #define DP_DP_HPD_PLUG_INT_MASK (0x00000001)
From: Stephen Boyd swboyd@chromium.org
During suspend, dp host controller and hpd block are disabled due to both ahb and aux clock are disabled. Therefore hpd plug/unplug interrupts will not be generated. At dp_pm_resume(), reinitialize both dp host controller and hpd block so that hpd plug/unplug interrupts will be generated and handled by driver so that hpd connection state is updated correctly. This patch will fix link training flaky issues.
Changes in v2: -- use container_of to cast correct dp_display_private pointer at both dp_pm_suspend() and dp_pm_resume().
Changes in v3: -- replace hpd_state atomic_t with u32
Changes in v4 -- call dp_display_host_deinit() at dp_pm_suspend() -- call dp_display_host_init() at msm_dp_display_enable() -- fix phy->init_count unbalance which causes link training failed
Signed-off-by: Kuogee Hsieh khsieh@codeaurora.org (am from https://lore.kernel.org/patchwork/patch/1320895/) (also found at https://lore.kernel.org/r/20201013233522.5222-1-khsieh@codeaurora.org)
BUG=b:166844571, b:148864048, b:170279524 TEST=On lazor, suspend with DP connected, disconnect cable, resume see panel is gone from settings
Signed-off-by: Stephen Boyd swboyd@chromium.org Change-Id: I9ff76b552ad9c671d1a75bd54bdf0ecb3a053e5c Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2... Commit-Queue: Rob Clark robdclark@chromium.org Reviewed-by: Rob Clark robdclark@chromium.org --- drivers/gpu/drm/msm/dp/dp_catalog.c | 2 +- drivers/gpu/drm/msm/dp/dp_ctrl.c | 5 ++ drivers/gpu/drm/msm/dp/dp_display.c | 83 ++++++++++++++++++----------- 3 files changed, 58 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 63c5ada34c21..4963bfe6a472 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -576,7 +576,7 @@ u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog); - u32 status = 0; + u32 status;
status = dp_read_aux(catalog, REG_DP_DP_HPD_INT_STATUS); status >>= DP_DP_HPD_STATE_STATUS_BITS_SHIFT; diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 7572264a7156..aa40429cad42 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1403,6 +1403,8 @@ int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip) void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) { struct dp_ctrl_private *ctrl; + struct dp_io *dp_io; + struct phy *phy;
if (!dp_ctrl) { DRM_ERROR("Invalid input data\n"); @@ -1410,8 +1412,11 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) }
ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + dp_io = &ctrl->parser->io; + phy = dp_io->phy;
dp_catalog_ctrl_enable_irq(ctrl->catalog, false); + phy_exit(phy);
DRM_DEBUG_DP("Host deinitialized successfully\n"); } diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index d431f0ee02bf..edae497da937 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -108,7 +108,7 @@ struct dp_display_private { /* event related only access by event thread */ struct mutex event_mutex; wait_queue_head_t event_q; - atomic_t hpd_state; + u32 hpd_state; u32 event_pndx; u32 event_gndx; struct dp_event event_list[DP_EVENT_Q_MAX]; @@ -365,6 +365,20 @@ static void dp_display_host_init(struct dp_display_private *dp) dp->core_initialized = true; }
+static void dp_display_host_deinit(struct dp_display_private *dp) +{ + if (!dp->core_initialized) { + DRM_DEBUG_DP("DP core not initialized\n"); + return; + } + + dp_ctrl_host_deinit(dp->ctrl); + dp_aux_deinit(dp->aux); + dp_power_deinit(dp->power); + + dp->core_initialized = false; +} + static int dp_display_usbpd_configure_cb(struct device *dev) { int rc = 0; @@ -489,7 +503,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
mutex_lock(&dp->event_mutex);
- state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -507,14 +521,14 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) return 0; }
- atomic_set(&dp->hpd_state, ST_CONNECT_PENDING); + dp->hpd_state = ST_CONNECT_PENDING;
hpd->hpd_high = 1;
ret = dp_display_usbpd_configure_cb(&dp->pdev->dev); if (ret) { /* failed */ hpd->hpd_high = 0; - atomic_set(&dp->hpd_state, ST_DISCONNECTED); + dp->hpd_state = ST_DISCONNECTED; }
/* start sanity checking */ @@ -535,10 +549,10 @@ static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
mutex_lock(&dp->event_mutex);
- state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_CONNECT_PENDING) { dp_display_enable(dp, 0); - atomic_set(&dp->hpd_state, ST_CONNECTED); + dp->hpd_state = ST_CONNECTED; }
mutex_unlock(&dp->event_mutex); @@ -571,7 +585,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
mutex_lock(&dp->event_mutex);
- state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -589,7 +603,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) return 0; }
- atomic_set(&dp->hpd_state, ST_DISCONNECT_PENDING); + dp->hpd_state = ST_DISCONNECT_PENDING;
/* disable HPD plug interrupt until disconnect is done */ dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK @@ -624,10 +638,10 @@ static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data
mutex_lock(&dp->event_mutex);
- state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_DISCONNECT_PENDING) { dp_display_disable(dp, 0); - atomic_set(&dp->hpd_state, ST_DISCONNECTED); + dp->hpd_state = ST_DISCONNECTED; }
mutex_unlock(&dp->event_mutex); @@ -642,7 +656,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex);
/* irq_hpd can happen at either connected or disconnected state */ - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -793,11 +807,6 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data)
dp_display = g_dp_display;
- if (dp_display->power_on) { - DRM_DEBUG_DP("Link already setup, return\n"); - return 0; - } - rc = dp_ctrl_on_stream(dp->ctrl); if (!rc) dp_display->power_on = true; @@ -830,9 +839,6 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data)
dp_display = g_dp_display;
- if (!dp_display->power_on) - return -EINVAL; - /* wait only if audio was enabled */ if (dp_display->audio_enabled) { if (!wait_for_completion_timeout(&dp->audio_comp, @@ -1195,6 +1201,12 @@ static int dp_pm_resume(struct device *dev)
dp = container_of(dp_display, struct dp_display_private, dp_display);
+ mutex_lock(&dp->event_mutex); + + /* start from disconnected state */ + dp->hpd_state = ST_DISCONNECTED; + + /* turn on dp ctrl/phy */ dp_display_host_init(dp);
dp_catalog_ctrl_hpd_config(dp->catalog); @@ -1209,6 +1221,8 @@ static int dp_pm_resume(struct device *dev) dp->core_initialized = false; }
+ mutex_unlock(&dp->event_mutex); + return 0; }
@@ -1220,10 +1234,14 @@ static int dp_pm_suspend(struct device *dev)
dp = container_of(dp_display, struct dp_display_private, dp_display);
- if (dp_display->power_on == true) - dp_display_disable(dp, 0); + mutex_lock(&dp->event_mutex);
- atomic_set(&dp->hpd_state, ST_SUSPENDED); + if (dp->core_initialized == true) + dp_display_host_deinit(dp); + + dp->hpd_state = ST_SUSPENDED; + + mutex_unlock(&dp->event_mutex);
return 0; } @@ -1352,6 +1370,8 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
mutex_lock(&dp_display->event_mutex);
+ dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT); + rc = dp_display_set_mode(dp, &dp_display->dp_mode); if (rc) { DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc); @@ -1366,7 +1386,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) return rc; }
- state = atomic_read(&dp_display->hpd_state); + state = dp_display->hpd_state; + + if (state == ST_DISPLAY_OFF) + dp_display_host_init(dp_display);
dp_display_enable(dp_display, 0);
@@ -1377,13 +1400,11 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) dp_display_unprepare(dp); }
- dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT); - if (state == ST_SUSPEND_PENDING) dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
/* completed connection */ - atomic_set(&dp_display->hpd_state, ST_CONNECTED); + dp_display->hpd_state = ST_CONNECTED;
mutex_unlock(&dp_display->event_mutex);
@@ -1411,20 +1432,20 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
mutex_lock(&dp_display->event_mutex);
+ dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); + dp_display_disable(dp_display, 0);
rc = dp_display_unprepare(dp); if (rc) DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
- dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); - - state = atomic_read(&dp_display->hpd_state); + state = dp_display->hpd_state; if (state == ST_DISCONNECT_PENDING) { /* completed disconnection */ - atomic_set(&dp_display->hpd_state, ST_DISCONNECTED); + dp_display->hpd_state = ST_DISCONNECTED; } else { - atomic_set(&dp_display->hpd_state, ST_SUSPEND_PENDING); + dp_display->hpd_state = ST_SUSPEND_PENDING; }
mutex_unlock(&dp_display->event_mutex);
Connection state is not set correctly happen when either failure of link train due to cable unplugged in the middle of aux channel reading or cable plugged in while in suspended state. This patch fixes these problems. This patch also replace ST_SUSPEND_PENDING with ST_DISPLAY_OFF.
Changes in V2: -- Add more information to commit message.
Changes in V3: -- change base
Signed-off-by: Kuogee Hsieh khsieh@codeaurora.org (am from https://lore.kernel.org/patchwork/patch/1320896/) (also found at https://lore.kernel.org/r/20201013233544.5324-1-khsieh@codeaurora.org)
BUG=b:166844571, b:148864048, b:170279524 TEST=Connect and disconnect DP cable quick and slow with USE="debug" kernel on Lazor, see that the UI doesn't get confused and think it is connected when it isn't
Signed-off-by: Stephen Boyd swboyd@chromium.org Change-Id: I00bfacc681a1685cf580841c7f066841363af450 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2... Reviewed-by: Sean Paul seanpaul@chromium.org Reviewed-by: Rob Clark robdclark@chromium.org Commit-Queue: Rob Clark robdclark@chromium.org --- drivers/gpu/drm/msm/dp/dp_display.c | 40 ++++++++++++++--------------- drivers/gpu/drm/msm/dp/dp_panel.c | 5 ++++ 2 files changed, 24 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index edae497da937..6e8640f8c69b 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -45,7 +45,7 @@ enum { ST_CONNECT_PENDING, ST_CONNECTED, ST_DISCONNECT_PENDING, - ST_SUSPEND_PENDING, + ST_DISPLAY_OFF, ST_SUSPENDED, };
@@ -504,7 +504,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex);
state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { + if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { mutex_unlock(&dp->event_mutex); return 0; } @@ -526,14 +526,14 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) hpd->hpd_high = 1;
ret = dp_display_usbpd_configure_cb(&dp->pdev->dev); - if (ret) { /* failed */ + if (ret) { /* link train failed */ hpd->hpd_high = 0; dp->hpd_state = ST_DISCONNECTED; + } else { + /* start sentinel checking in case of missing uevent */ + dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); }
- /* start sanity checking */ - dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); - mutex_unlock(&dp->event_mutex);
/* uevent will complete connection part */ @@ -586,11 +586,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex);
state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { - mutex_unlock(&dp->event_mutex); - return 0; - } - if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) { mutex_unlock(&dp->event_mutex); return 0; @@ -617,7 +612,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) */ dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
- /* start sanity checking */ + /* start sentinel checking in case of missing uevent */ dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
/* signal the disconnect event early to ensure proper teardown */ @@ -657,7 +652,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
/* irq_hpd can happen at either connected or disconnected state */ state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { + if (state == ST_DISPLAY_OFF) { mutex_unlock(&dp->event_mutex); return 0; } @@ -1082,7 +1077,7 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id) }
if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) { - /* delete connect pending event first */ + /* stop sentinel connect pending checking */ dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT); dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0); } @@ -1213,13 +1208,10 @@ static int dp_pm_resume(struct device *dev)
status = dp_catalog_hpd_get_state_status(dp->catalog);
- if (status) { + if (status) dp->dp_display.is_connected = true; - } else { + else dp->dp_display.is_connected = false; - /* make sure next resume host_init be called */ - dp->core_initialized = false; - }
mutex_unlock(&dp->event_mutex);
@@ -1241,6 +1233,9 @@ static int dp_pm_suspend(struct device *dev)
dp->hpd_state = ST_SUSPENDED;
+ /* host_init will be called at pm_resume */ + dp->core_initialized = false; + mutex_unlock(&dp->event_mutex);
return 0; @@ -1370,6 +1365,7 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
mutex_lock(&dp_display->event_mutex);
+ /* stop sentinel checking */ dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
rc = dp_display_set_mode(dp, &dp_display->dp_mode); @@ -1400,7 +1396,8 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) dp_display_unprepare(dp); }
- if (state == ST_SUSPEND_PENDING) + /* manual kick off plug event to train link */ + if (state == ST_DISPLAY_OFF) dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
/* completed connection */ @@ -1432,6 +1429,7 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
mutex_lock(&dp_display->event_mutex);
+ /* stop sentinel checking */ dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
dp_display_disable(dp_display, 0); @@ -1445,7 +1443,7 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) /* completed disconnection */ dp_display->hpd_state = ST_DISCONNECTED; } else { - dp_display->hpd_state = ST_SUSPEND_PENDING; + dp_display->hpd_state = ST_DISPLAY_OFF; }
mutex_unlock(&dp_display->event_mutex); diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 18cec4fc5e0b..1b7a20dc2d8e 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -196,6 +196,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, &panel->aux->ddc); if (!dp_panel->edid) { DRM_ERROR("panel edid read failed\n"); + /* check edid read fail is due to unplug */ + if (!dp_catalog_hpd_get_state_status(panel->catalog)) { + rc = -ETIMEDOUT; + goto end; + }
/* fail safe edid */ mutex_lock(&connector->dev->mode_config.mutex);
dri-devel@lists.freedesktop.org
-
Kuogee Hsieh