[PATCH v13 12/35] drm/tegra: hdmi: Add OPP support
From: Dmitry Osipenko <digetx@gmail.com>
Date: 2021-09-26 22:44:50
Also in:
dri-devel, linux-clk, linux-devicetree, linux-mmc, linux-pm, linux-pwm, linux-tegra, linux-usb, lkml
Subsystem:
drm drivers, drm drivers for nvidia tegra, the rest · Maintainers:
David Airlie, Simona Vetter, Thierry Reding, Mikko Perttunen, Linus Torvalds
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. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- drivers/gpu/drm/tegra/hdmi.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
index e5d2a4026028..9a87d351a828 100644
--- a/drivers/gpu/drm/tegra/hdmi.c
+++ b/drivers/gpu/drm/tegra/hdmi.c@@ -11,10 +11,13 @@ #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 <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_debugfs.h>
@@ -1195,7 +1198,7 @@ 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);
@@ -1732,7 +1735,14 @@ 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;
@@ -1753,8 +1763,6 @@ 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",
--
2.32.0