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

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[ Upstream commit 531b4e2c206e5f7dead04d9da84dfa693ac57481 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2025-05-05 03:14:52 +03:00 • committed by Greg Kroah-Hartman
commit 9c60c173ab
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)