Commit 271502ef authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: output: Implement system suspend/resume 



Implement generic system suspend/resume functions that can be used with
any output type. Currently this only implements disabling and enabling
of the IRQ functionality across system suspend/resume. This prevents an
interrupt from happening before the display driver has fully resumed.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent f90965ab

drivers/gpu/drm/tegra/output.c

+16 −0
Original line number Diff line number Diff line
@@ -250,3 +250,19 @@ void tegra_output_find_possible_crtcs(struct tegra_output *output, 


	output->encoder.possible_crtcs = mask;

}



int tegra_output_suspend(struct tegra_output *output)

{

	if (output->hpd_irq)

		disable_irq(output->hpd_irq);



	return 0;

}



int tegra_output_resume(struct tegra_output *output)

{

	if (output->hpd_irq)

		enable_irq(output->hpd_irq);



	return 0;

}

drivers/gpu/drm/tegra/sor.c

+17 −0
Original line number Diff line number Diff line
@@ -3995,9 +3995,16 @@ static int __maybe_unused tegra_sor_suspend(struct device *dev) 
	struct tegra_sor *sor = dev_get_drvdata(dev);

	int err;



	err = tegra_output_suspend(&sor->output);

	if (err < 0) {

		dev_err(dev, "failed to suspend output: %d\n", err);

		return err;

	}



	if (sor->hdmi_supply) {

		err = regulator_disable(sor->hdmi_supply);

		if (err < 0) {

			tegra_output_resume(&sor->output);

			return err;

		}

	}
@@ -4016,6 +4023,16 @@ static int __maybe_unused tegra_sor_resume(struct device *dev) 
			return err;

	}



	err = tegra_output_resume(&sor->output);

	if (err < 0) {

		dev_err(dev, "failed to resume output: %d\n", err);



		if (sor->hdmi_supply)

			regulator_disable(sor->hdmi_supply);



		return err;

	}



	return 0;

}

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