From patchwork Sat Oct 31 00:38:28 2015
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Bjorn Andersson <bjorn@kryo.se>
X-Patchwork-Id: 7530131
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 EA3189F399
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Sat, 31 Oct 2015 00:39:14 +0000 (UTC)
Received: from mail.kernel.org (localhost [127.0.0.1])
	by mail.kernel.org (Postfix) with ESMTP id 8C8CA20749
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Sat, 31 Oct 2015 00:39:13 +0000 (UTC)
Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177])
	by mail.kernel.org (Postfix) with ESMTP id 52DB02073C
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Sat, 31 Oct 2015 00:39:12 +0000 (UTC)
Received: from gabe.freedesktop.org (localhost [127.0.0.1])
	by gabe.freedesktop.org (Postfix) with ESMTP id 154496E288;
	Fri, 30 Oct 2015 17:39:11 -0700 (PDT)
X-Original-To: dri-devel@lists.freedesktop.org
Delivered-To: dri-devel@lists.freedesktop.org
Received: from mail-pa0-f43.google.com (mail-pa0-f43.google.com
	[209.85.220.43])
	by gabe.freedesktop.org (Postfix) with ESMTPS id 375B56E2EE
	for <dri-devel@lists.freedesktop.org>;
	Fri, 30 Oct 2015 17:39:07 -0700 (PDT)
Received: by pasz6 with SMTP id z6so88218096pas.2
	for <dri-devel@lists.freedesktop.org>;
	Fri, 30 Oct 2015 17:39:06 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=kryo_se.20150623.gappssmtp.com; s=20150623;
	h=from:to:cc:subject:date:message-id:in-reply-to:references;
	bh=9cGHDEBTcrJhJnV9W4Y7TdtVjX24N+/9SqdK94kJK04=;
	b=xYF2catqAgWnL1uRIScd39aca/wlLu4sk/g/gQsL4bWcoAEkhZ1mM3gA6anjxU+qj/
	9wqgC5Xj9w+GFeKoMCwuXALAyx6SRakZ3EMe/MFWHslrEoD26jf7h0i4K/UYwgerSxXn
	HxpFqM4cJZprRn2ZGU2Drsfu63nP3i4fcqYTz9hYsAhRx+eNtFV6n+K7li9IQ1MZ8rqQ
	aUbP3wW0cDW7QYMzo8c4ec6Kn04U2FXzTjgfMVTK0noGN0oPDfEfWFTQw6dLW4YX0sYn
	YH5b3C/UMQGeRmuziYqtXdUv3CFsfq4nRxy65fYrI3cnlgd2663u9MPU1bIg0/r/BYAL
	turQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20130820;
	h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to
	:references;
	bh=9cGHDEBTcrJhJnV9W4Y7TdtVjX24N+/9SqdK94kJK04=;
	b=DkRNLbC7UmNpPDiSqxDqVWGB/6oVVI5yzjexj6TBZoczumb7P1/txgkOcqlfvv2Cm9
	Lp1LIp8L0l/iNmDXpaUo3S4MPBGFIMxoOSCjTYy3hNe2LF8pGhzDkiGcuqXqUA/PcYOJ
	ERnEqeTwGK4VbWfiwuWPIkJjtxHOlwYBtsAbIGANv2o9mRjJweKBIG6W2oKNlUPHes5E
	BUD00CKDsdvGkxUDYMh7wOcJGo2vgf9ZWkpqIN27cKZYFYRgzG4bEOw0yf0nhEIfIGm0
	0AqoOv7bxhQYUACqZG0FOimxSiZ4/AIZcl4XwAiLayE+VSfYgshdkzWZhgwq6mALnNGS
	twQg==
X-Gm-Message-State: 
 ALoCoQkXOzzLfNkknScc4WeaE8qKkK/uZKX+KfjwH421RAIvrK0yl5vER93P7kjHazctJ/xO65Ib
X-Received: by 10.68.135.1 with SMTP id po1mr12103241pbb.23.1446251946837;
	Fri, 30 Oct 2015 17:39:06 -0700 (PDT)
Received: from Bjorns-MacBook-Pro.local.com
	(cpe-76-167-68-231.natsow.res.rr.com. [76.167.68.231])
	by smtp.gmail.com with ESMTPSA id
	z12sm10406547pbt.30.2015.10.30.17.39.05
	(version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
	Fri, 30 Oct 2015 17:39:05 -0700 (PDT)
From: bjorn@kryo.se
To: Thierry Reding <thierry.reding@gmail.com>,
	David Airlie <airlied@linux.ie>
Subject: [PATCH 3/3] drm/panel: Add Panasonic VVX10F034N00 MIPI DSI panel
Date: Fri, 30 Oct 2015 17:38:28 -0700
Message-Id: <1446251908-2603-3-git-send-email-bjorn@kryo.se>
X-Mailer: git-send-email 2.3.2 (Apple Git-55)
In-Reply-To: <1446251908-2603-1-git-send-email-bjorn@kryo.se>
References: <1446251908-2603-1-git-send-email-bjorn@kryo.se>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
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: <http://lists.freedesktop.org/mailman/options/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://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: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
MIME-Version: 1.0
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
X-Spam-Status: No, score=-5.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,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

From: Werner Johansson <werner.johansson@sonymobile.com>

This adds support for the Panasonic panel found in some Xperia Z2
tablets.

Signed-off-by: Werner Johansson <werner.johansson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
 drivers/gpu/drm/panel/Kconfig                      |  10 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 .../gpu/drm/panel/panel-panasonic-vvx10f034n00.c   | 334 +++++++++++++++++++++
 3 files changed, 345 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7d4704b..77a20d6 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -51,4 +51,14 @@ config DRM_PANEL_SHARP_LQ101R1SX01
 	  To compile this driver as a module, choose M here: the module
 	  will be called panel-sharp-lq101r1sx01.
 
+config DRM_PANEL_PANASONIC_VVX10F034N00
+	tristate "Panasonic VVX10F034N00 1920x1200 video mode panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for Panasonic VVX10F034N00
+	  WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
+	  Xperia Z2 tablets
+
 endmenu
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index d0f016d..a2ca8ff 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
+obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
diff --git a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
new file mode 100644
index 0000000..7f915f7
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (C) 2015 Red Hat
+ * Copyright (C) 2015 Sony Mobile Communications Inc.
+ * Author: Werner Johansson <werner.johansson@sonymobile.com>
+ *
+ * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/backlight.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+/*
+ * When power is turned off to this panel a minimum off time of 500ms has to be
+ * observed before powering back on as there's no external reset pin. Keep
+ * track of earliest wakeup time and delay subsequent prepare call accordingly
+ */
+#define MIN_POFF_MS (500)
+
+struct wuxga_nt_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *dsi;
+
+	struct backlight_device *backlight;
+	struct regulator *supply;
+
+	bool prepared;
+	bool enabled;
+
+	ktime_t earliest_wake;
+
+	const struct drm_display_mode *mode;
+};
+
+static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct wuxga_nt_panel, base);
+}
+
+static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
+{
+	struct mipi_dsi_device *dsi = wuxga_nt->dsi;
+	int ret;
+
+	ret = mipi_dsi_turn_on_peripheral(dsi);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int wuxga_nt_panel_disable(struct drm_panel *panel)
+{
+	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
+
+	if (!wuxga_nt->enabled)
+		return 0;
+
+	mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
+
+	if (wuxga_nt->backlight) {
+		wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
+		wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;
+		backlight_update_status(wuxga_nt->backlight);
+	}
+
+	wuxga_nt->enabled = false;
+
+	return 0;
+}
+
+static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
+{
+	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
+
+	if (!wuxga_nt->prepared)
+		return 0;
+
+	regulator_disable(wuxga_nt->supply);
+	wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
+	wuxga_nt->prepared = false;
+
+	return 0;
+}
+
+static int wuxga_nt_panel_prepare(struct drm_panel *panel)
+{
+	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
+	int ret;
+	s64 enablewait;
+
+	if (wuxga_nt->prepared)
+		return 0;
+
+	/*
+	 * If the user re-enabled the panel before the required off-time then
+	 * we need to wait the remaining period before re-enabling regulator
+	 */
+	enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
+
+	/* Sanity check, this should never happen */
+	if (enablewait > MIN_POFF_MS)
+		enablewait = MIN_POFF_MS;
+
+	if (enablewait > 0)
+		msleep(enablewait);
+
+	ret = regulator_enable(wuxga_nt->supply);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * A minimum delay of 250ms is required after power-up until commands
+	 * can be sent
+	 */
+	msleep(250);
+
+	ret = wuxga_nt_panel_on(wuxga_nt);
+	if (ret < 0) {
+		dev_err(panel->dev, "failed to set panel on: %d\n", ret);
+		goto poweroff;
+	}
+
+	wuxga_nt->prepared = true;
+
+	return 0;
+
+poweroff:
+	regulator_disable(wuxga_nt->supply);
+
+	return ret;
+}
+
+static int wuxga_nt_panel_enable(struct drm_panel *panel)
+{
+	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
+
+	if (wuxga_nt->enabled)
+		return 0;
+
+	if (wuxga_nt->backlight) {
+		wuxga_nt->backlight->props.power = FB_BLANK_UNBLANK;
+		wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;
+		backlight_update_status(wuxga_nt->backlight);
+	}
+
+	wuxga_nt->enabled = true;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 164402,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 152,
+	.hsync_end = 1920 + 152 + 52,
+	.htotal = 1920 + 152 + 52 + 20,
+	.vdisplay = 1200,
+	.vsync_start = 1200 + 24,
+	.vsync_end = 1200 + 24 + 6,
+	.vtotal = 1200 + 24 + 6 + 48,
+	.vrefresh = 60,
+};
+
+static int wuxga_nt_panel_get_modes(struct drm_panel *panel)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(panel->drm, &default_mode);
+	if (!mode) {
+		dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
+				default_mode.hdisplay, default_mode.vdisplay,
+				default_mode.vrefresh);
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	drm_mode_probed_add(panel->connector, mode);
+
+	panel->connector->display_info.width_mm = 217;
+	panel->connector->display_info.height_mm = 136;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
+	.disable = wuxga_nt_panel_disable,
+	.unprepare = wuxga_nt_panel_unprepare,
+	.prepare = wuxga_nt_panel_prepare,
+	.enable = wuxga_nt_panel_enable,
+	.get_modes = wuxga_nt_panel_get_modes,
+};
+
+static const struct of_device_id wuxga_nt_of_match[] = {
+	{ .compatible = "panasonic,vvx10f034n00", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
+
+static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
+{
+	struct device *dev = &wuxga_nt->dsi->dev;
+	struct device_node *np;
+	int ret;
+
+	wuxga_nt->mode = &default_mode;
+
+	wuxga_nt->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(wuxga_nt->supply))
+		return PTR_ERR(wuxga_nt->supply);
+
+	np = of_parse_phandle(dev->of_node, "backlight", 0);
+	if (np) {
+		wuxga_nt->backlight = of_find_backlight_by_node(np);
+		of_node_put(np);
+
+		if (!wuxga_nt->backlight)
+			return -EPROBE_DEFER;
+	}
+
+	drm_panel_init(&wuxga_nt->base);
+	wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;
+	wuxga_nt->base.dev = &wuxga_nt->dsi->dev;
+
+	ret = drm_panel_add(&wuxga_nt->base);
+	if (ret < 0)
+		goto put_backlight;
+
+	return 0;
+
+put_backlight:
+	if (wuxga_nt->backlight)
+		put_device(&wuxga_nt->backlight->dev);
+
+	return ret;
+}
+
+static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
+{
+	if (wuxga_nt->base.dev)
+		drm_panel_remove(&wuxga_nt->base);
+
+	if (wuxga_nt->backlight)
+		put_device(&wuxga_nt->backlight->dev);
+}
+
+static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct wuxga_nt_panel *wuxga_nt;
+	int ret;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+			MIPI_DSI_MODE_VIDEO_HSE |
+			MIPI_DSI_CLOCK_NON_CONTINUOUS |
+			MIPI_DSI_MODE_LPM;
+
+	wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
+	if (!wuxga_nt)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, wuxga_nt);
+
+	wuxga_nt->dsi = dsi;
+
+	ret = wuxga_nt_panel_add(wuxga_nt);
+	if (ret < 0)
+		return ret;
+
+	return mipi_dsi_attach(dsi);
+}
+
+static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
+	int ret;
+
+	ret = wuxga_nt_panel_disable(&wuxga_nt->base);
+	if (ret < 0)
+		dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
+
+	ret = mipi_dsi_detach(dsi);
+	if (ret < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
+
+	drm_panel_detach(&wuxga_nt->base);
+	wuxga_nt_panel_del(wuxga_nt);
+
+	return 0;
+}
+
+static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
+
+	wuxga_nt_panel_disable(&wuxga_nt->base);
+}
+
+static struct mipi_dsi_driver wuxga_nt_panel_driver = {
+	.driver = {
+		.name = "panel-panasonic-vvx10f034n00",
+		.of_match_table = wuxga_nt_of_match,
+	},
+	.probe = wuxga_nt_panel_probe,
+	.remove = wuxga_nt_panel_remove,
+	.shutdown = wuxga_nt_panel_shutdown,
+};
+module_mipi_dsi_driver(wuxga_nt_panel_driver);
+
+MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
+MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
+MODULE_LICENSE("GPL v2");