From patchwork Fri Mar 24 00:51:32 2017
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Chris Zhong <zyw@rock-chips.com>
X-Patchwork-Id: 9642191
Return-Path: <dri-devel-bounces@lists.freedesktop.org>
Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org
	[172.30.200.125])
	by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id
	E9C63601E9 for <patchwork-dri-devel@patchwork.kernel.org>;
	Fri, 24 Mar 2017 00:51:44 +0000 (UTC)
Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1])
	by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA9322823E
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Fri, 24 Mar 2017 00:51:44 +0000 (UTC)
Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486)
	id CF1E428475; Fri, 24 Mar 2017 00:51:44 +0000 (UTC)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	pdx-wl-mail.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.7 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED,
	RCVD_IN_SORBS_SPAM autolearn=ham version=3.3.1
Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177])
	(using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256
	bits)) (No client certificate requested)
	by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3B6B82823E
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Fri, 24 Mar 2017 00:51:44 +0000 (UTC)
Received: from gabe.freedesktop.org (localhost [127.0.0.1])
	by gabe.freedesktop.org (Postfix) with ESMTP id EA7F16EB75;
	Fri, 24 Mar 2017 00:51:42 +0000 (UTC)
X-Original-To: dri-devel@lists.freedesktop.org
Delivered-To: dri-devel@lists.freedesktop.org
Received: from mail-pf0-f196.google.com (mail-pf0-f196.google.com
	[209.85.192.196])
	by gabe.freedesktop.org (Postfix) with ESMTPS id E6E876EB75
	for <dri-devel@lists.freedesktop.org>;
	Fri, 24 Mar 2017 00:51:41 +0000 (UTC)
Received: by mail-pf0-f196.google.com with SMTP id o126so32688pfb.1
	for <dri-devel@lists.freedesktop.org>;
	Thu, 23 Mar 2017 17:51:41 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20161025;
	h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to
	:references;
	bh=wCqhOQNyfwtRC2xp52K7M6fw0BEzVCKUvs8TGw9nE8M=;
	b=cqQVG054giawElAB9kT6rNq+hSX+oMQEjn9H+8d22NyPp6ZTS2fETTacVM6nE6wh8N
	F21uYbBUfEuq5eyHnL2TJFMJSgwttlFUaoUvR9dZTvwaHcwQ1Wnl7GHjR3uBkt9ipYQd
	2O57iKmKLD6lEUiDYxNeFyIpoxYrE8gL9hldVADuZRtt9TX8O50Cfwaoo+pIiZIiv+VT
	q0KQ+ygo6etVqanKwwFI3QhValSvNLVC4TQBpk9Pw2XTbF9BgZC2kR1GznVHxbZVIZ4p
	ptqADErUNL3DguPpa0qnUp1hf2RyoYGa5TKq8eA+JTFLAOYfVC9YdX6YICm9UM6/OM7Q
	oTLQ==
X-Gm-Message-State: 
 AFeK/H0MskyYJQj79G1TnuHfyDbzsMqICT3PzjJsygIQieuTl7meuPUNDxALzwqWmvjukg==
X-Received: by 10.99.110.138 with SMTP id j132mr5659149pgc.217.1490316701486;
	Thu, 23 Mar 2017 17:51:41 -0700 (PDT)
Received: from localhost.localdomain ([103.29.142.67])
	by smtp.gmail.com with ESMTPSA id
	i3sm539310pfg.117.2017.03.23.17.51.39
	(version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
	Thu, 23 Mar 2017 17:51:40 -0700 (PDT)
From: Chris Zhong <zyw@rock-chips.com>
To: linux-rockchip@lists.infradead.org,
	thierry.reding@gmail.com
Subject: [PATCH v4 2/2] drm/panel: add innolux,p079zca panel driver
Date: Fri, 24 Mar 2017 08:51:32 +0800
Message-Id: <1490316692-20506-2-git-send-email-zyw@rock-chips.com>
X-Mailer: git-send-email 2.6.3
In-Reply-To: <1490316692-20506-1-git-send-email-zyw@rock-chips.com>
References: <1490316692-20506-1-git-send-email-zyw@rock-chips.com>
Cc: Chris Zhong <zyw@rock-chips.com>, 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: <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>
MIME-Version: 1.0
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
X-Virus-Scanned: ClamAV using ClamSMTP

Support Innolux P079ZCA 7.85" 768x1024 TFT LCD panel, it is a MIPI DSI
panel.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
---

Changes in v4:
- remove backlight check after probe
- add bpc info

Changes in v3:
- printk err after regulator_disable(innolux->supply)

Changes in v2:
- add some error check
- always use Low power mode to send commend
- add comments for all the sleep
- use DRM_DEV_ERROR instead of dev_err

 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-innolux-p079zca.c | 340 ++++++++++++++++++++++++++
 3 files changed, 352 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-innolux-p079zca.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 62aba97..99dd010 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -18,6 +18,17 @@ config DRM_PANEL_SIMPLE
 	  that it can be automatically turned off when the panel goes into a
 	  low power state.
 
+config DRM_PANEL_INNOLUX_P079ZCA
+	tristate "Innolux P079ZCA 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 Innolux P079ZCA
+	  TFT-LCD modules. The panel has a 1024x768 resolution and uses
+	  24 bit RGB per pixel. It provides a MIPI DSI interface to
+	  the host and has a built-in LED backlight.
+
 config DRM_PANEL_JDI_LT070ME05000
 	tristate "JDI LT070ME05000 WUXGA DSI panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index a5c7ec0..bda2aa4 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
 obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
new file mode 100644
index 0000000..6ba9344
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
@@ -0,0 +1,340 @@
+/*
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.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>
+
+struct innolux_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct backlight_device *backlight;
+	struct regulator *supply;
+	struct gpio_desc *enable_gpio;
+
+	bool prepared;
+	bool enabled;
+};
+
+static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct innolux_panel, base);
+}
+
+static int innolux_panel_disable(struct drm_panel *panel)
+{
+	struct innolux_panel *innolux = to_innolux_panel(panel);
+	int err;
+
+	if (!innolux->enabled)
+		return 0;
+
+	innolux->backlight->props.power = FB_BLANK_POWERDOWN;
+	backlight_update_status(innolux->backlight);
+
+	err = mipi_dsi_dcs_set_display_off(innolux->link);
+	if (err < 0)
+		DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
+			      err);
+
+	innolux->enabled = false;
+
+	return 0;
+}
+
+static int innolux_panel_unprepare(struct drm_panel *panel)
+{
+	struct innolux_panel *innolux = to_innolux_panel(panel);
+	int err;
+
+	if (!innolux->prepared)
+		return 0;
+
+	err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
+	if (err < 0) {
+		DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
+			      err);
+		return err;
+	}
+
+	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+	/* T8: 80ms - 1000ms */
+	msleep(80);
+
+	err = regulator_disable(innolux->supply);
+	if (err < 0)
+		return err;
+
+	innolux->prepared = false;
+
+	return 0;
+}
+
+static int innolux_panel_prepare(struct drm_panel *panel)
+{
+	struct innolux_panel *innolux = to_innolux_panel(panel);
+	int err, regulator_err;
+
+	if (innolux->prepared)
+		return 0;
+
+	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+	err = regulator_enable(innolux->supply);
+	if (err < 0)
+		return err;
+
+	/* T2: 15ms - 1000ms */
+	usleep_range(15000, 16000);
+
+	gpiod_set_value_cansleep(innolux->enable_gpio, 1);
+
+	/* T4: 15ms - 1000ms */
+	usleep_range(15000, 16000);
+
+	err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
+	if (err < 0) {
+		DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
+			      err);
+		goto poweroff;
+	}
+
+	/* T6: 120ms - 1000ms*/
+	msleep(120);
+
+	err = mipi_dsi_dcs_set_display_on(innolux->link);
+	if (err < 0) {
+		DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
+			      err);
+		goto poweroff;
+	}
+
+	/* T7: 5ms */
+	usleep_range(5000, 6000);
+
+	innolux->prepared = true;
+
+	return 0;
+
+poweroff:
+	regulator_err = regulator_disable(innolux->supply);
+	if (regulator_err)
+		DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
+			      regulator_err);
+
+	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+	return err;
+}
+
+static int innolux_panel_enable(struct drm_panel *panel)
+{
+	struct innolux_panel *innolux = to_innolux_panel(panel);
+	int ret;
+
+	if (innolux->enabled)
+		return 0;
+
+	innolux->backlight->props.power = FB_BLANK_UNBLANK;
+	ret = backlight_update_status(innolux->backlight);
+	if (ret) {
+		DRM_DEV_ERROR(panel->drm->dev,
+			      "Failed to enable backlight %d\n", ret);
+		return ret;
+	}
+
+	innolux->enabled = true;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 56900,
+	.hdisplay = 768,
+	.hsync_start = 768 + 40,
+	.hsync_end = 768 + 40 + 40,
+	.htotal = 768 + 40 + 40 + 40,
+	.vdisplay = 1024,
+	.vsync_start = 1024 + 20,
+	.vsync_end = 1024 + 20 + 4,
+	.vtotal = 1024 + 20 + 4 + 20,
+	.vrefresh = 60,
+};
+
+static int innolux_panel_get_modes(struct drm_panel *panel)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(panel->drm, &default_mode);
+	if (!mode) {
+		DRM_DEV_ERROR(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 = 120;
+	panel->connector->display_info.height_mm = 160;
+	panel->connector->display_info.bpc = 8;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs innolux_panel_funcs = {
+	.disable = innolux_panel_disable,
+	.unprepare = innolux_panel_unprepare,
+	.prepare = innolux_panel_prepare,
+	.enable = innolux_panel_enable,
+	.get_modes = innolux_panel_get_modes,
+};
+
+static const struct of_device_id innolux_of_match[] = {
+	{ .compatible = "innolux,p079zca", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, innolux_of_match);
+
+static int innolux_panel_add(struct innolux_panel *innolux)
+{
+	struct device *dev = &innolux->link->dev;
+	struct device_node *np;
+	int err;
+
+	innolux->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(innolux->supply))
+		return PTR_ERR(innolux->supply);
+
+	innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+						       GPIOD_OUT_HIGH);
+	if (IS_ERR(innolux->enable_gpio)) {
+		err = PTR_ERR(innolux->enable_gpio);
+		dev_dbg(dev, "failed to get enable gpio: %d\n", err);
+		innolux->enable_gpio = NULL;
+	}
+
+	np = of_parse_phandle(dev->of_node, "backlight", 0);
+	if (np) {
+		innolux->backlight = of_find_backlight_by_node(np);
+		of_node_put(np);
+
+		if (!innolux->backlight)
+			return -EPROBE_DEFER;
+	}
+
+	drm_panel_init(&innolux->base);
+	innolux->base.funcs = &innolux_panel_funcs;
+	innolux->base.dev = &innolux->link->dev;
+
+	err = drm_panel_add(&innolux->base);
+	if (err < 0)
+		goto put_backlight;
+
+	return 0;
+
+put_backlight:
+	put_device(&innolux->backlight->dev);
+
+	return err;
+}
+
+static void innolux_panel_del(struct innolux_panel *innolux)
+{
+	if (innolux->base.dev)
+		drm_panel_remove(&innolux->base);
+
+	put_device(&innolux->backlight->dev);
+}
+
+static int innolux_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct innolux_panel *innolux;
+	int err;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+			  MIPI_DSI_MODE_LPM;
+
+	innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL);
+	if (!innolux)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, innolux);
+
+	innolux->link = dsi;
+
+	err = innolux_panel_add(innolux);
+	if (err < 0)
+		return err;
+
+	err = mipi_dsi_attach(dsi);
+	return err;
+}
+
+static int innolux_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+	int err;
+
+	err = innolux_panel_unprepare(&innolux->base);
+	if (err < 0)
+		DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
+			      err);
+
+	err = innolux_panel_disable(&innolux->base);
+	if (err < 0)
+		DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
+
+	err = mipi_dsi_detach(dsi);
+	if (err < 0)
+		DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
+			      err);
+
+	drm_panel_detach(&innolux->base);
+	innolux_panel_del(innolux);
+
+	return 0;
+}
+
+static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+
+	innolux_panel_unprepare(&innolux->base);
+	innolux_panel_disable(&innolux->base);
+}
+
+static struct mipi_dsi_driver innolux_panel_driver = {
+	.driver = {
+		.name = "panel-innolux-p079zca",
+		.of_match_table = innolux_of_match,
+	},
+	.probe = innolux_panel_probe,
+	.remove = innolux_panel_remove,
+	.shutdown = innolux_panel_shutdown,
+};
+module_mipi_dsi_driver(innolux_panel_driver);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
+MODULE_LICENSE("GPL v2");