linux-kernel - [PATCH 1/1] drm/panel: boe-tv101wum-n16 seperate the panel power control

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Message-ID: <20191106081752.12944-2-jitao.shi@mediatek.com>
Date:   Wed, 6 Nov 2019 16:17:52 +0800
From:   Jitao Shi <jitao.shi@...iatek.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
CC:     <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <yingjoe.chen@...iatek.com>,
        <eddie.huang@...iatek.com>, <cawa.cheng@...iatek.com>,
        <bibby.hsieh@...iatek.com>, <ck.hu@...iatek.com>,
        <stonea168@....com>, Jitao Shi <jitao.shi@...iatek.com>
Subject: [PATCH 1/1] drm/panel: boe-tv101wum-n16 seperate the panel power control

Seperate the panel power control from prepare/unprepare.

Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
---
 .../gpu/drm/panel/panel-boe-tv101wum-nl6.c    | 69 +++++++++++++------
 1 file changed, 49 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index e2496a334ab6..5b1b285a2194 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -50,6 +50,7 @@ struct boe_panel {
 	struct regulator *avdd;
 	struct gpio_desc *enable_gpio;
 
+	bool prepared_power;
 	bool prepared;
 	bool enabled;
 
@@ -501,12 +502,11 @@ static int boe_panel_disable(struct drm_panel *panel)
 	return 0;
 }
 
-static int boe_panel_unprepare(struct drm_panel *panel)
+static int boe_panel_unprepare_power(struct drm_panel *panel)
 {
 	struct boe_panel *boe = to_boe_panel(panel);
-	int ret;
 
-	if (!boe->prepared)
+	if (!boe->prepared_power)
 		return 0;
 
 	if (boe->desc->discharge_on_disable) {
@@ -518,12 +518,6 @@ static int boe_panel_unprepare(struct drm_panel *panel)
 		usleep_range(5000, 7000);
 		regulator_disable(boe->pp1800);
 	} else {
-		ret = boe_panel_off(boe);
-		if (ret < 0) {
-			dev_err(panel->dev, "failed to set panel off: %d\n",
-				ret);
-			return ret;
-		}
 		msleep(150);
 		gpiod_set_value(boe->enable_gpio, 0);
 		usleep_range(500, 1000);
@@ -533,17 +527,39 @@ static int boe_panel_unprepare(struct drm_panel *panel)
 		regulator_disable(boe->pp1800);
 	}
 
+	boe->prepared_power = false;
+
+	return 0;
+}
+
+static int boe_panel_unprepare(struct drm_panel *panel)
+{
+	struct boe_panel *boe = to_boe_panel(panel);
+	int ret;
+
+	if (!boe->prepared)
+		return 0;
+
+	if (!boe->desc->discharge_on_disable) {
+		ret = boe_panel_off(boe);
+		if (ret < 0) {
+			dev_err(panel->dev, "failed to set panel off: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
 	boe->prepared = false;
 
 	return 0;
 }
 
-static int boe_panel_prepare(struct drm_panel *panel)
+static int boe_panel_prepare_power(struct drm_panel *panel)
 {
 	struct boe_panel *boe = to_boe_panel(panel);
 	int ret;
 
-	if (boe->prepared)
+	if (boe->prepared_power)
 		return 0;
 
 	gpiod_set_value(boe->enable_gpio, 0);
@@ -571,18 +587,10 @@ static int boe_panel_prepare(struct drm_panel *panel)
 	gpiod_set_value(boe->enable_gpio, 1);
 	usleep_range(6000, 10000);
 
-	ret = boe_panel_init(boe);
-	if (ret < 0) {
-		dev_err(panel->dev, "failed to init panel: %d\n", ret);
-		goto poweroff;
-	}
-
-	boe->prepared = true;
+	boe->prepared_power = true;
 
 	return 0;
 
-poweroff:
-	regulator_disable(boe->avee);
 poweroffavdd:
 	regulator_disable(boe->avdd);
 poweroff1v8:
@@ -593,6 +601,25 @@ static int boe_panel_prepare(struct drm_panel *panel)
 	return ret;
 }
 
+static int boe_panel_prepare(struct drm_panel *panel)
+{
+	struct boe_panel *boe = to_boe_panel(panel);
+	int ret;
+
+	if (boe->prepared)
+		return 0;
+
+	ret = boe_panel_init(boe);
+	if (ret < 0) {
+		dev_err(panel->dev, "failed to init panel: %d\n", ret);
+		return ret;
+	}
+
+	boe->prepared = true;
+
+	return 0;
+}
+
 static int boe_panel_enable(struct drm_panel *panel)
 {
 	struct boe_panel *boe = to_boe_panel(panel);
@@ -754,7 +781,9 @@ static int boe_panel_get_modes(struct drm_panel *panel)
 static const struct drm_panel_funcs boe_panel_funcs = {
 	.disable = boe_panel_disable,
 	.unprepare = boe_panel_unprepare,
+	.unprepare_power = boe_panel_unprepare_power,
 	.prepare = boe_panel_prepare,
+	.prepare_power = boe_panel_prepare_power,
 	.enable = boe_panel_enable,
 	.get_modes = boe_panel_get_modes,
 };
-- 
2.21.0