Commit 6efdde0c authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Thierry Reding
Browse files

drm/tegra: hdmi: Add OPP support 



The HDMI on Tegra belongs to the core power domain and we're going to
enable GENPD support for the core domain. Now HDMI driver must use
OPP API for driving the controller's clock rate because OPP API takes
care of reconfiguring the domain's performance state based on HDMI clock
rate. Add OPP support to the HDMI driver.

Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 4ce3048c

drivers/gpu/drm/tegra/hdmi.c

+11 −4
Original line number Diff line number Diff line
@@ -11,10 +11,12 @@ 
#include <linux/math64.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/pm_opp.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>

#include <linux/reset.h>



#include <soc/tegra/common.h>

#include <sound/hdmi-codec.h>



#include <drm/drm_atomic_helper.h>
@@ -1237,7 +1239,7 @@ static void tegra_hdmi_encoder_enable(struct drm_encoder *encoder) 
	h_back_porch = mode->htotal - mode->hsync_end;

	h_front_porch = mode->hsync_start - mode->hdisplay;



	err = clk_set_rate(hdmi->clk, hdmi->pixel_clock);

	err = dev_pm_opp_set_rate(hdmi->dev, hdmi->pixel_clock);

	if (err < 0) {

		dev_err(hdmi->dev, "failed to set HDMI clock frequency: %d\n",

			err);
@@ -1872,7 +1874,14 @@ static int tegra_hdmi_probe(struct platform_device *pdev) 
	}



	platform_set_drvdata(pdev, hdmi);

	pm_runtime_enable(&pdev->dev);



	err = devm_pm_runtime_enable(&pdev->dev);

	if (err)

		return err;



	err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);

	if (err)

		return err;



	INIT_LIST_HEAD(&hdmi->client.list);

	hdmi->client.ops = &hdmi_client_ops;
@@ -1893,8 +1902,6 @@ static int tegra_hdmi_remove(struct platform_device *pdev) 
	struct tegra_hdmi *hdmi = platform_get_drvdata(pdev);

	int err;



	pm_runtime_disable(&pdev->dev);



	err = host1x_client_unregister(&hdmi->client);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",