drm/msm/dsi: Enable runtime PM

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>

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index b6314bb66d2fd43d420f2b3e85a89c06ca34e9e6..e49ebd9f6326f32a36fd1a8f29b1ab7006c9d640 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -691,6 +691,10 @@ 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.
         */