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drm/msm/hdmi: ensure that HDMI is up if HPD is requested

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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@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/651722/
Link: https://lore.kernel.org/r/20250505-fd-hdmi-hpd-v5-12-48541f76318c@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2025-05-05 03:14:56 +03:00 committed by Dmitry Baryshkov
parent 969bbbf7fb
commit b93f19d8d0
4 changed files with 18 additions and 2 deletions
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1
drivers/gpu/drm/msm/hdmi/hdmi.c
View File

@ -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)

2
drivers/gpu/drm/msm/hdmi/hdmi.h
View File

@ -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;

8
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
View File

@ -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,

9
drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
View File

@ -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);
}