From 69c1d655b4d9b8a09d957d8e0160b6d23f9c98d3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ga=C3=ABtan=20Andr=C3=A9?= Date: Sun, 8 Mar 2020 09:46:41 +0100 Subject: [PATCH 50/78] FIXME: drm/panel: samsung-tc358764-ltl101al06: Add PWM clock The brightness of the panel is controlled through a special clock that emits a PWM signal. It is not yet clear how to change the brightness, but the clock needs to be kept on for the backlight to work. --- .../panel-samsung-tc358764-ltl101al06.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/panel/msm8916-generated/panel-samsung-tc358764-ltl101al06.c b/drivers/gpu/drm/panel/msm8916-generated/panel-samsung-tc358764-ltl101al06.c index 404128e11..08ced2d09 100644 --- a/drivers/gpu/drm/panel/msm8916-generated/panel-samsung-tc358764-ltl101al06.c +++ b/drivers/gpu/drm/panel/msm8916-generated/panel-samsung-tc358764-ltl101al06.c @@ -3,6 +3,7 @@ // Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree: // Copyright (c) 2013, The Linux Foundation. All rights reserved. (FIXME) +#include #include #include #include @@ -18,6 +19,7 @@ struct tc358764_ltl101a106 { struct mipi_dsi_device *dsi; struct regulator_bulk_data supplies[2]; struct gpio_desc *reset_gpio; + struct clk *pwm_clk; bool prepared; }; @@ -123,6 +125,12 @@ static int tc358764_ltl101a106_prepare(struct drm_panel *panel) return ret; } + ret = clk_prepare_enable(ctx->pwm_clk); + if (ret < 0) { + dev_err(dev, "Failed to enable pwm clock: %d\n", ret); + return ret; + } + ctx->prepared = true; return 0; } @@ -136,6 +144,8 @@ static int tc358764_ltl101a106_unprepare(struct drm_panel *panel) if (!ctx->prepared) return 0; + clk_disable_unprepare(ctx->pwm_clk); + ret = tc358764_ltl101a106_off(ctx); if (ret < 0) dev_err(dev, "Failed to un-initialize panel: %d\n", ret); @@ -208,6 +218,11 @@ static int tc358764_ltl101a106_probe(struct mipi_dsi_device *dsi) return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "Failed to get reset-gpios\n"); + ctx->pwm_clk = devm_clk_get(dev, "pwm"); + if (IS_ERR(ctx->pwm_clk)) + return dev_err_probe(dev, PTR_ERR(ctx->pwm_clk), + "Failed to get pwm clock\n"); + ctx->dsi = dsi; mipi_dsi_set_drvdata(dsi, ctx); @@ -219,10 +234,6 @@ static int tc358764_ltl101a106_probe(struct mipi_dsi_device *dsi) drm_panel_init(&ctx->panel, dev, &tc358764_ltl101a106_panel_funcs, DRM_MODE_CONNECTOR_DSI); - ret = drm_panel_of_backlight(&ctx->panel); - if (ret) - return dev_err_probe(dev, ret, "Failed to get backlight\n"); - drm_panel_add(&ctx->panel); ret = mipi_dsi_attach(dsi); -- 2.31.1