[PATCH v8 13/34] drm/tegra: hdmi: Add OPP support
From: Dmitry Osipenko <digetx@gmail.com>
Date: 2021-08-17 01:33:09
Also in:
dri-devel, linux-clk, linux-devicetree, linux-media, linux-mmc, linux-pwm, linux-spi, linux-staging, 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 | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
index e5d2a4026028..aa13028480f7 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);
@@ -1516,6 +1519,12 @@ static int tegra_hdmi_runtime_resume(struct host1x_client *client) return err; } + err = dev_pm_opp_sync(dev); + if (err) { + dev_err(dev, "failed to sync OPP: %d\n", err); + goto put_rpm; + } + err = clk_prepare_enable(hdmi->clk); if (err < 0) { dev_err(dev, "failed to enable clock: %d\n", err);
@@ -1708,6 +1717,10 @@ static int tegra_hdmi_probe(struct platform_device *pdev) hdmi->output.dev = &pdev->dev; + err = devm_tegra_core_dev_init_opp_table_simple(&pdev->dev); + if (err) + return err; + err = tegra_output_probe(&hdmi->output); if (err < 0) return err;
--
2.32.0