From patchwork Mon Mar 21 21:10:27 2016
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?=
 <u.kleine-koenig@pengutronix.de>
X-Patchwork-Id: 8636341
Return-Path: <dri-devel-bounces@lists.freedesktop.org>
X-Original-To: patchwork-dri-devel@patchwork.kernel.org
Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org
Received: from mail.kernel.org (mail.kernel.org [198.145.29.136])
	by patchwork1.web.kernel.org (Postfix) with ESMTP id 265A09F36E
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Mon, 21 Mar 2016 21:23:52 +0000 (UTC)
Received: from mail.kernel.org (localhost [127.0.0.1])
	by mail.kernel.org (Postfix) with ESMTP id 4E9AB2025B
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Mon, 21 Mar 2016 21:23:51 +0000 (UTC)
Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177])
	by mail.kernel.org (Postfix) with ESMTP id 6E1D12024C
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Mon, 21 Mar 2016 21:23:50 +0000 (UTC)
Received: from gabe.freedesktop.org (localhost [127.0.0.1])
	by gabe.freedesktop.org (Postfix) with ESMTP id 946306E5EF;
	Mon, 21 Mar 2016 21:23:40 +0000 (UTC)
X-Original-To: dri-devel@lists.freedesktop.org
Delivered-To: dri-devel@lists.freedesktop.org
Received: from arcturus.kleine-koenig.org (arcturus.kleine-koenig.org
	[78.47.169.190])
	by gabe.freedesktop.org (Postfix) with ESMTPS id 624D46E5EF
	for <dri-devel@lists.freedesktop.org>;
	Mon, 21 Mar 2016 21:23:35 +0000 (UTC)
Received: by arcturus.kleine-koenig.org (Postfix, from userid 1000)
	id 8D033969DB; Mon, 21 Mar 2016 22:15:47 +0100 (CET)
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
To: dri-devel@lists.freedesktop.org,
	David Airlie <airlied@linux.ie>
Subject: [PATCH v3 3/3] drm/omap: panel-dpi: implement support for a vcc
	regulator
Date: Mon, 21 Mar 2016 22:10:27 +0100
Message-Id: <1458594627-14256-4-git-send-email-u.kleine-koenig@pengutronix.de>
X-Mailer: git-send-email 2.7.0
In-Reply-To: 
 <1458594627-14256-1-git-send-email-u.kleine-koenig@pengutronix.de>
References: <1458594627-14256-1-git-send-email-u.kleine-koenig@pengutronix.de>
MIME-Version: 1.0
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>, kernel@pengutronix.de
X-BeenThere: dri-devel@lists.freedesktop.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: Direct Rendering Infrastructure - Development
	<dri-devel.lists.freedesktop.org>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED,
	RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org
X-Virus-Scanned: ClamAV using ClamSMTP

To allow supporting displays that need some logic to enable power to the
display try to get a vcc-supply property from the device tree and drive
the resulting regulator accordingly.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/gpu/drm/omapdrm/displays/panel-dpi.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
index 201a1c1a6f42..8c3f31ebff00 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
 
 #include <video/omapdss.h>
 #include <video/omap-panel-data.h>
@@ -32,6 +33,7 @@ struct panel_drv_data {
 	int backlight_gpio;
 
 	struct gpio_desc *enable_gpio;
+	struct regulator *vcc_supply;
 };
 
 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
@@ -83,6 +85,12 @@ static int panel_dpi_enable(struct omap_dss_device *dssdev)
 	if (r)
 		return r;
 
+	r = regulator_enable(ddata->vcc_supply);
+	if (r) {
+		in->ops.dpi->disable(in);
+		return r;
+	}
+
 	gpiod_set_value_cansleep(ddata->enable_gpio, 1);
 
 	if (gpio_is_valid(ddata->backlight_gpio))
@@ -105,6 +113,7 @@ static void panel_dpi_disable(struct omap_dss_device *dssdev)
 		gpio_set_value_cansleep(ddata->backlight_gpio, 0);
 
 	gpiod_set_value_cansleep(ddata->enable_gpio, 0);
+	regulator_disable(ddata->vcc_supply);
 
 	in->ops.dpi->disable(in);
 
@@ -223,6 +232,10 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
 	if (IS_ERR(gpio))
 		return PTR_ERR(gpio);
 
+	ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
+	if (IS_ERR(ddata->vcc_supply))
+		return PTR_ERR(ddata->vcc_supply);
+
 	ddata->backlight_gpio = -ENOENT;
 
 	r = of_get_display_timing(node, "panel-timing", &timing);