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drm/msm/hdmi: add runtime PM calls to DDC transfer function 

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().

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/651727/
Link: https://lore.kernel.org/r/20250505-fd-hdmi-hpd-v5-8-48541f76318c@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2025-05-05 03:14:52 +03:00 committed by Dmitry Baryshkov
parent 81aa834197
commit 531b4e2c20
1 changed files with 12 additions and 2 deletions
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14
drivers/gpu/drm/msm/hdmi/hdmi_i2c.c
View File

@ -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)