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drm: bridge: dw-hdmi: Fixed ddc error caused by plug out hdmi when reading edid

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Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Change-Id: Ie220584b5ae17822170bf761f699d8897caf9975
This commit is contained in:
Algea Cao
2023-03-14 17:16:56 +08:00
committed by Tao Huang
parent db1e0d503a
commit b8f0114968
1 changed files with 23 additions and 9 deletions
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32
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -420,18 +420,14 @@ static void repo_hpd_event(struct work_struct *p_work)
if (hdmi->bridge.dev) {
bool change;
void *data = hdmi->plat_data->phy_data;
change = drm_helper_hpd_irq_event(hdmi->bridge.dev);
if (change) {
if (hdmi->plat_data->set_ddc_io)
hdmi->plat_data->set_ddc_io(data, hdmi->hpd_state);
if (hdmi->cec_adap->devnode.registered)
cec_queue_pin_hpd_event(hdmi->cec_adap,
hdmi->hpd_state,
ktime_get());
}
if (change && hdmi->cec_adap &&
hdmi->cec_adap->devnode.registered)
cec_queue_pin_hpd_event(hdmi->cec_adap,
hdmi->hpd_state,
ktime_get());
drm_bridge_hpd_notify(&hdmi->bridge, status);
}
}
@@ -632,7 +628,11 @@ static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi,
while (retry > 0) {
if (!(hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD)) {
void *data = hdmi->plat_data->phy_data;
dev_dbg(hdmi->dev, "hdmi disconnect, stop ddc read\n");
if (hdmi->plat_data->set_ddc_io)
hdmi->plat_data->set_ddc_io(data, false);
return -EPERM;
}
@@ -695,7 +695,11 @@ static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi,
while (retry > 0) {
if (!(hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD)) {
void *data = hdmi->plat_data->phy_data;
dev_dbg(hdmi->dev, "hdmi disconnect, stop ddc write\n");
if (hdmi->plat_data->set_ddc_io)
hdmi->plat_data->set_ddc_io(data, false);
return -EPERM;
}
@@ -736,6 +740,7 @@ static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
struct dw_hdmi *hdmi = i2c_get_adapdata(adap);
struct dw_hdmi_i2c *i2c = hdmi->i2c;
u8 addr = msgs[0].addr;
void *data = hdmi->plat_data->phy_data;
int i, ret = 0;
if (addr == DDC_CI_ADDR)
@@ -760,6 +765,9 @@ static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
mutex_lock(&i2c->lock);
if (hdmi->plat_data->set_ddc_io)
hdmi->plat_data->set_ddc_io(data, true);
hdmi_writeb(hdmi, 0, HDMI_I2CM_SOFTRSTZ);
udelay(100);
@@ -3924,6 +3932,7 @@ static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct dw_hdmi *hdmi = bridge->driver_private;
void *data = hdmi->plat_data->phy_data;
mutex_lock(&hdmi->mutex);
hdmi->disabled = true;
@@ -3932,6 +3941,11 @@ static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
mutex_lock(&hdmi->i2c->lock);
if (hdmi->plat_data->set_ddc_io)
hdmi->plat_data->set_ddc_io(data, false);
mutex_unlock(&hdmi->i2c->lock);
}
static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,