The HDMI block needs to be enabled to properly generate HPD events. Make
sure it is not turned off in the disable paths if HPD delivery is enabled.
Reviewed-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/msm/hdmi/hdmi.c | 1 +
drivers/gpu/drm/msm/hdmi/hdmi.h | 2 ++
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 8 +++++++-
drivers/gpu/drm/msm/hdmi/hdmi_hpd.c | 9 ++++++++-
4 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 97faa7d26cc9..9f1de4c9ffdf 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -384,6 +384,7 @@ static int msm_hdmi_dev_probe(struct platform_device *pdev)
hdmi->pdev = pdev;
hdmi->config = config;
spin_lock_init(&hdmi->reg_lock);
+ mutex_init(&hdmi->state_mutex);
ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge);
if (ret && ret != -ENODEV)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 6faf4397ed58..9961dae9e9b3 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -42,6 +42,8 @@ struct hdmi {
/* video state: */
bool power_on;
+ bool hpd_enabled;
+ struct mutex state_mutex; /* protects two booleans */
unsigned long int pixclock;
void __iomem *mmio;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index c15c49c08d30..7bf1c3b379c1 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -308,11 +308,13 @@ static void msm_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
hdmi->pixclock = conn_state->hdmi.tmds_char_rate;
+ mutex_lock(&hdmi->state_mutex);
if (!hdmi->power_on) {
msm_hdmi_phy_resource_enable(phy);
msm_hdmi_power_on(bridge);
hdmi->power_on = true;
}
+ mutex_unlock(&hdmi->state_mutex);
drm_atomic_helper_connector_hdmi_update_infoframes(connector, state);
@@ -337,7 +339,10 @@ static void msm_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
msm_hdmi_hdcp_off(hdmi->hdcp_ctrl);
DBG("power down");
- msm_hdmi_set_mode(hdmi, false);
+
+ /* Keep the HDMI enabled if the HPD is enabled */
+ mutex_lock(&hdmi->state_mutex);
+ msm_hdmi_set_mode(hdmi, hdmi->hpd_enabled);
msm_hdmi_phy_powerdown(phy);
@@ -346,6 +351,7 @@ static void msm_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
hdmi->power_on = false;
msm_hdmi_phy_resource_disable(phy);
}
+ mutex_unlock(&hdmi->state_mutex);
}
static void msm_hdmi_bridge_atomic_set_timings(struct hdmi *hdmi,
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
index d3353c6148ed..cb89e9e2c6ea 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
@@ -73,10 +73,14 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
if (ret)
return ret;
+ mutex_lock(&hdmi->state_mutex);
msm_hdmi_set_mode(hdmi, false);
msm_hdmi_phy_reset(hdmi);
msm_hdmi_set_mode(hdmi, true);
+ hdmi->hpd_enabled = true;
+ mutex_unlock(&hdmi->state_mutex);
+
hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
/* enable HPD events: */
@@ -106,7 +110,10 @@ void msm_hdmi_hpd_disable(struct hdmi *hdmi)
/* Disable HPD interrupt */
hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
- msm_hdmi_set_mode(hdmi, false);
+ mutex_lock(&hdmi->state_mutex);
+ hdmi->hpd_enabled = false;
+ msm_hdmi_set_mode(hdmi, hdmi->power_on);
+ mutex_unlock(&hdmi->state_mutex);
pm_runtime_put(dev);
}
--
2.39.2
