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drm/msm/dsi: Enable runtime PM

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commit 6ab502bc1cf3147ea1d8540d04b83a7a4cb6d1f1 upstream.

Some devices power the DSI PHY/PLL through a power rail that we model
as a GENPD. Enable runtime PM to make it suspendable.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/543352/
Link: https://lore.kernel.org/r/20230620-topic-dsiphy_rpm-v2-2-a11a751f34f0@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konrad Dybcio 2023-06-20 13:43:21 +02:00 committed by Greg Kroah-Hartman
parent befdb0a8a1
commit 98c392a91a
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
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@ -673,6 +673,10 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
return dev_err_probe(dev, PTR_ERR(phy->ahb_clk),
"Unable to get ahb clk\n");
ret = devm_pm_runtime_enable(&pdev->dev);
if (ret)
return ret;
/* PLL init will call into clk_register which requires
* register access, so we need to enable power and ahb clock.
*/