From: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
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_jessz...@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
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
3d10fe6f8545198365a047b2f5652081703101aa..5355cfd391c5cc3053f771dd03e24dfde16733bf
100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -293,6 +293,7 @@ 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
fb64652162b6c5e6e2fe3357b89c40e2a28aa47e..e488ee31cc865b4eee9d486d978217c00f7816bf
100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -41,6 +41,8 @@ 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
665c5e1323d09513621429a6f184fb89bae0a37d..8ff0079abc801448e96b73ebea4730edea55ea6c
100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -302,11 +302,13 @@ static void msm_hdmi_bridge_atomic_pre_enable(struct
drm_bridge *bridge,
msm_hdmi_set_timings(hdmi, &crtc_state->adjusted_mode);
+ 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);
if (connector->display_info.is_hdmi)
msm_hdmi_audio_update(hdmi);
@@ -332,7 +334,10 @@ 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);
@@ -343,6 +348,7 @@ static void msm_hdmi_bridge_atomic_post_disable(struct
drm_bridge *bridge,
msm_hdmi_audio_update(hdmi);
msm_hdmi_phy_resource_disable(phy);
}
+ mutex_unlock(&hdmi->state_mutex);
}
static void msm_hdmi_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
a42ed26a5b7c7d916d543aa2920754347903062a..e03d0ca230e64d7675534074d6e14587815119b6
100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
@@ -76,10 +76,14 @@ 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: */
@@ -109,7 +113,10 @@ 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);
}
--
2.39.5
