We must be sure that the HDMI controller is powered on, while performing
the DDC transfer. Add corresponding runtime PM calls to
msm_hdmi_i2c_xfer().
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/msm/hdmi/hdmi_i2c.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c b/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c
index 7aa500d24240..ebefea4fb408 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c
@@ -107,11 +107,15 @@ static int msm_hdmi_i2c_xfer(struct i2c_adapter *i2c,
if (num == 0)
return num;
+ ret = pm_runtime_resume_and_get(&hdmi->pdev->dev);
+ if (ret)
+ return ret;
+
init_ddc(hdmi_i2c);
ret = ddc_clear_irq(hdmi_i2c);
if (ret)
- return ret;
+ goto fail;
for (i = 0; i < num; i++) {
struct i2c_msg *p = &msgs[i];
@@ -169,7 +173,7 @@ static int msm_hdmi_i2c_xfer(struct i2c_adapter *i2c,
hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS),
hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS),
hdmi_read(hdmi, REG_HDMI_DDC_INT_CTRL));
- return ret;
+ goto fail;
}
ddc_status = hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS);
@@ -202,7 +206,13 @@ static int msm_hdmi_i2c_xfer(struct i2c_adapter *i2c,
}
}
+ pm_runtime_put(&hdmi->pdev->dev);
+
return i;
+
+fail:
+ pm_runtime_put(&hdmi->pdev->dev);
+ return ret;
}
static u32 msm_hdmi_i2c_func(struct i2c_adapter *adapter)
--
2.39.2
