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From:   Ondrej Jirman <megous@megous.com>
To:     linux-sunxi@googlegroups.com,
        Thierry Reding <thierry.reding@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
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        Daniel Vetter <daniel@ffwll.ch>,
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        Purism Kernel Team <kernel@puri.sm>,
        Rob Herring <robh+dt@kernel.org>,
        Maxime Ripard <mripard@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Icenowy Zheng <icenowy@aosc.io>
Cc:     Ondrej Jirman <megous@megous.com>, dri-devel@lists.freedesktop.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Samuel Holland <samuel@sholland.org>,
        Martijn Braam <martijn@brixit.nl>, Luca Weiss <luca@z3ntu.xyz>,
        Bhushan Shah <bshah@kde.org>
Subject: [PATCH v7 08/13] drm/panel: st7703: Move generic part of init sequence to enable callback
Date:   Wed,  1 Jul 2020 18:29:23 +0200
Message-Id: <20200701162928.1638874-9-megous@megous.com>
In-Reply-To: <20200701162928.1638874-1-megous@megous.com>
References: <20200701162928.1638874-1-megous@megous.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Calling sleep out and display on is a controller specific part
of the initialization process. Move it out of the panel specific
initialization function to the enable callback.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpu/drm/panel/panel-sitronix-st7703.c | 33 ++++++++++---------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index 61872f623fff..96e39ec94900 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -84,8 +84,6 @@ static inline struct st7703 *panel_to_st7703(struct drm_panel *panel)
 static int jh057n_init_sequence(struct st7703 *ctx)
 {
 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
-	struct device *dev = ctx->dev;
-	int ret;
 
 	/*
 	 * Init sequence was supplied by the panel vendor. Most of the commands
@@ -136,20 +134,7 @@ static int jh057n_init_sequence(struct st7703 *ctx)
 			      0x18, 0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41,
 			      0x37, 0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10,
 			      0x11, 0x18);
-	msleep(20);
-
-	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dev, "Failed to exit sleep mode: %d\n", ret);
-		return ret;
-	}
-	/* Panel is operational 120 msec after reset */
-	msleep(60);
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret)
-		return ret;
 
-	DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n");
 	return 0;
 }
 
@@ -180,6 +165,7 @@ struct st7703_panel_desc jh057n00900_panel_desc = {
 static int st7703_enable(struct drm_panel *panel)
 {
 	struct st7703 *ctx = panel_to_st7703(panel);
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
 	int ret;
 
 	ret = ctx->desc->init_sequence(ctx);
@@ -189,6 +175,23 @@ static int st7703_enable(struct drm_panel *panel)
 		return ret;
 	}
 
+	msleep(20);
+
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
+		return ret;
+	}
+
+	/* Panel is operational 120 msec after reset */
+	msleep(60);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret)
+		return ret;
+
+	DRM_DEV_DEBUG_DRIVER(ctx->dev, "Panel init sequence done\n");
+
 	return 0;
 }
 
-- 
2.27.0