Commit 531b4e2c authored by Dmitry Baryshkov's avatar Dmitry Baryshkov Committed by Dmitry Baryshkov
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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: default avatarJessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: default avatarDmitry 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: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent 81aa8341

drivers/gpu/drm/msm/hdmi/hdmi_i2c.c

+12 −2
Original line number Diff line number Diff line
@@ -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)