[PATCH v2 03/25] drm/panel: simple: use drm_panel backlight support

From: Sam Ravnborg <sam@ravnborg•org>
To: dri-devel@lists•freedesktop.org,
	Thierry Reding <thierry.reding@gmail•com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard•com>,
	Linus Walleij <linus.walleij@linaro•org>,
	Sam Ravnborg <sam@ravnborg•org>
Cc: Neil Armstrong <narmstrong@baylibre•com>,
	David Airlie <airlied@linux•ie>, Stefan Agner <stefan@agner•ch>,
	Andrzej Hajda <a.hajda@samsung•com>,
	Benjamin Gaignard <benjamin.gaignard@linaro•org>,
	linux-samsung-soc@vger•kernel.org,
	linux-rockchip@lists•infradead.org,
	Tomi Valkeinen <tomi.valkeinen@ti•com>,
	Jagan Teki <jagan@amarulasolutions•com>,
	NXP Linux Team <linux-imx@nxp•com>,
	Jitao Shi <jitao.shi@mediatek•com>,
	Pengutronix Kernel Team <kernel@pengutronix•de>,
	Maarten Lankhorst <maarten.lankhorst@linux•intel.com>,
	Maxime Ripard <mripard@kernel•org>,
	linux-mediatek@lists•infradead.org,
	Abhinav Kumar <abhinavk@codeaurora•org>,
	linux-tegra@vger•kernel.org, Sean Paul <sean@poorly•run>,
	linux-arm-kernel@lists•infradead.org,
	Purism Kernel Team <kernel@puri•sm>,
	linux-renesas-soc@vger•kernel.org,
	Boris Brezillon <boris.brezillon@collabora•com>,
	Daniel Vetter <daniel@ffwll•ch>
Subject: [PATCH v2 03/25] drm/panel: simple: use drm_panel backlight support
Date: Sat,  7 Dec 2019 15:03:31 +0100	[thread overview]
Message-ID: <20191207140353.23967-4-sam@ravnborg.org> (raw)
In-Reply-To: <20191207140353.23967-1-sam@ravnborg.org>

Use drm_panel infrastructure for backlight.
Replace direct calls with drm_panel_*() calls
to utilize the drm_panel support.

Signed-off-by: Sam Ravnborg <sam@ravnborg•org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard•com>
cc: Laurent Pinchart <laurent.pinchart@ideasonboard•com>
Cc: Thierry Reding <thierry.reding@gmail•com>
Cc: Sam Ravnborg <sam@ravnborg•org>
---
 drivers/gpu/drm/panel/panel-simple.c | 50 ++++++----------------------
 1 file changed, 11 insertions(+), 39 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 72f69709f349..a5df6d6dd455 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -21,7 +21,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
@@ -105,7 +104,6 @@ struct panel_simple {
 
 	const struct panel_desc *desc;
 
-	struct backlight_device *backlight;
 	struct regulator *supply;
 	struct i2c_adapter *ddc;
 
@@ -236,12 +234,6 @@ static int panel_simple_disable(struct drm_panel *panel)
 	if (!p->enabled)
 		return 0;
 
-	if (p->backlight) {
-		p->backlight->props.power = FB_BLANK_POWERDOWN;
-		p->backlight->props.state |= BL_CORE_FBBLANK;
-		backlight_update_status(p->backlight);
-	}
-
 	if (p->desc->delay.disable)
 		msleep(p->desc->delay.disable);
 
@@ -307,12 +299,6 @@ static int panel_simple_enable(struct drm_panel *panel)
 	if (p->desc->delay.enable)
 		msleep(p->desc->delay.enable);
 
-	if (p->backlight) {
-		p->backlight->props.state &= ~BL_CORE_FBBLANK;
-		p->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(p->backlight);
-	}
-
 	p->enabled = true;
 
 	return 0;
@@ -414,9 +400,9 @@ static void panel_simple_parse_panel_timing_node(struct device *dev,
 
 static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 {
-	struct device_node *backlight, *ddc;
 	struct panel_simple *panel;
 	struct display_timing dt;
+	struct device_node *ddc;
 	int err;
 
 	panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
@@ -442,24 +428,13 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 		return err;
 	}
 
-	backlight = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (backlight) {
-		panel->backlight = of_find_backlight_by_node(backlight);
-		of_node_put(backlight);
-
-		if (!panel->backlight)
-			return -EPROBE_DEFER;
-	}
-
 	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
 	if (ddc) {
 		panel->ddc = of_find_i2c_adapter_by_node(ddc);
 		of_node_put(ddc);
 
-		if (!panel->ddc) {
-			err = -EPROBE_DEFER;
-			goto free_backlight;
-		}
+		if (!panel->ddc)
+			return -EPROBE_DEFER;
 	}
 
 	if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))
@@ -468,6 +443,10 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	drm_panel_init(&panel->base, dev, &panel_simple_funcs,
 		       desc->connector_type);
 
+	err = drm_panel_of_backlight(&panel->base);
+	if (err)
+		goto free_ddc;
+
 	err = drm_panel_add(&panel->base);
 	if (err < 0)
 		goto free_ddc;
@@ -479,9 +458,6 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 free_ddc:
 	if (panel->ddc)
 		put_device(&panel->ddc->dev);
-free_backlight:
-	if (panel->backlight)
-		put_device(&panel->backlight->dev);
 
 	return err;
 }
@@ -491,16 +467,12 @@ static int panel_simple_remove(struct device *dev)
 	struct panel_simple *panel = dev_get_drvdata(dev);
 
 	drm_panel_remove(&panel->base);
-
-	panel_simple_disable(&panel->base);
-	panel_simple_unprepare(&panel->base);
+	drm_panel_disable(&panel->base);
+	drm_panel_unprepare(&panel->base);
 
 	if (panel->ddc)
 		put_device(&panel->ddc->dev);
 
-	if (panel->backlight)
-		put_device(&panel->backlight->dev);
-
 	return 0;
 }
 
@@ -508,8 +480,8 @@ static void panel_simple_shutdown(struct device *dev)
 {
 	struct panel_simple *panel = dev_get_drvdata(dev);
 
-	panel_simple_disable(&panel->base);
-	panel_simple_unprepare(&panel->base);
+	drm_panel_disable(&panel->base);
+	drm_panel_unprepare(&panel->base);
 }
 
 static const struct drm_display_mode ampire_am_480272h3tmqw_t01h_mode = {
-- 
2.20.1


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