From patchwork Tue Sep  8 07:54:21 2020
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-Patchwork-Submitter: Neil Armstrong <narmstrong@baylibre.com>
X-Patchwork-Id: 11762807
X-Patchwork-Delegate: neil.armstrong@linaro.org
Return-Path: 
 <SRS0=I/m2=CR=lists.infradead.org=linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@kernel.org>
Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org
 [172.30.200.123])
	by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A0EC7746
	for <patchwork-linux-amlogic@patchwork.kernel.org>;
 Tue,  8 Sep 2020 07:54:49 +0000 (UTC)
Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by mail.kernel.org (Postfix) with ESMTPS id 67A0E21D43
	for <patchwork-linux-amlogic@patchwork.kernel.org>;
 Tue,  8 Sep 2020 07:54:49 +0000 (UTC)
Authentication-Results: mail.kernel.org;
	dkim=pass (2048-bit key) header.d=lists.infradead.org
 header.i=@lists.infradead.org header.b="y//vyvlr";
	dkim=fail reason="signature verification failed" (2048-bit key)
 header.d=baylibre-com.20150623.gappssmtp.com
 header.i=@baylibre-com.20150623.gappssmtp.com header.b="xi4/4UQ0"
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67A0E21D43
Authentication-Results: mail.kernel.org;
 dmarc=none (p=none dis=none) header.from=baylibre.com
Authentication-Results: mail.kernel.org;
 spf=none
 smtp.mailfrom=linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
	d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding:
	Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive:
	List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date:
	Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date:
	Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner;
	 bh=bkQownqZk2UHMwomurOsmYPUknjNAQpgg5s+S3fNETI=; b=y//vyvlr5WZuoUxs11q9+hUhY
	flRrJMe7mnpFbe0a2EfWsGjE2ECvbhzlae7DlTaPr+LnYp5rKwxptQ9xdBwN9Y8GurzHgRcfN7TU/
	3d6Diy1ExwzWA5siauh/l0YBpJ/yxZfJycfvjXsvyfVR2F9hzg8Y9qhGy2Rdyy5DPtY0/tGV1Y9+X
	yxHH7hWbBUnbR49YuxK1ihZJwfo/AHGYurE3pXdLh4DgM1AHb+vfGreaHCaxlHLA+V3Lb9DPYmsdB
	96lvTMdFBzarh+U1kMDlQD0WM0u3MjWpoNQk4dGiBYv1yJWyf+OAZyuB+BAHcZx/WvbZCVnIri9p+
	rqk9Y2qtQ==;
Received: from localhost ([::1] helo=merlin.infradead.org)
	by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux))
	id 1kFYSc-0007PQ-5t; Tue, 08 Sep 2020 07:54:38 +0000
Received: from mail-wm1-x342.google.com ([2a00:1450:4864:20::342])
 by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux))
 id 1kFYSX-0007MH-Kg
 for linux-amlogic@lists.infradead.org; Tue, 08 Sep 2020 07:54:35 +0000
Received: by mail-wm1-x342.google.com with SMTP id x23so6368023wmi.3
 for <linux-amlogic@lists.infradead.org>;
 Tue, 08 Sep 2020 00:54:33 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=baylibre-com.20150623.gappssmtp.com; s=20150623;
 h=from:to:cc:subject:date:message-id:in-reply-to:references
 :mime-version:content-transfer-encoding;
 bh=xFKEais/JinAAfcewjMMwYVj5kDYRr5zvHtIDXxFhJI=;
 b=xi4/4UQ0PvigM8ZhWNQwD3AfqhWz3xZaSH7JiJEhQqqCVQvjpHoX1Z7dycINut+fcz
 T+KjzX7rr1zL9TmU9VuhNoWMhTIzoCUwSHa86eo692OfFkG3vsrlp85bzPIjtUGT37bS
 DyHt2K209WIHzB10x0eu1hSj/86vFkLiPNbRF5isgfdlGRi4ug5jE3+MoJe3GwPI8Cj0
 5RRcAhVuy2AjL/JHAVZM6PjnEAoUC1DZLw93zG5sYJokTA/mZ9x06Yg2d/+V8pPEbZ8W
 SJ27YZaTwDcf8F7N6pVLfXf7QmjO5Tf5ZChC111SIlc7b2MFBohOKSaEoO7RnmOCBv7R
 DImA==
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:mime-version:content-transfer-encoding;
 bh=xFKEais/JinAAfcewjMMwYVj5kDYRr5zvHtIDXxFhJI=;
 b=OlDeFPpfvT+WF5uimKbsCRdi/2h2c2nhuJk+lYXkRtD4qHN4SXC82w2AUct05nOmIr
 cSDR0q6Trz/wvs2s6DfElXqLsAS6HmzzA6gSBKpB7MofBks/0NSs3olQWW3AfvVbtGhW
 b2WeBsGG3brMIhQeuwWD7bPPvYNYP3lxRVjVlScrkbzvLN+12LO0m1AovZYlRq9fabfG
 aUQ7plQ49LEVs7flz65l5eQa0R/fABgjLu6sAyf9dYWYjVYnSRIUjyLkBRO1wiFy6+rj
 euTOcVidliZchmElh1itNybQ09EzgWvPHnX6PqiTQZZrVr2u2L1Z3d4cxK5EbJNv7iC9
 FVyQ==
X-Gm-Message-State: AOAM533PVkmPE+3bFEX/tuCSPvsJ5Gs9i8bTGTzaZhrY+WSRh/7AQxK5
 hG0a9KqBd9D2ElgUy4soAUAavQ==
X-Google-Smtp-Source: 
 ABdhPJz3EmqI+FOfoLMwo95hpOn6ISyFX/MTAWGAUGSWldXc1ZQm8+D91yV2jne9ygTkFInnh4ChSA==
X-Received: by 2002:a7b:c208:: with SMTP id x8mr3045009wmi.30.1599551672530;
 Tue, 08 Sep 2020 00:54:32 -0700 (PDT)
Received: from bender.baylibre.local
 ([2a01:e35:2ec0:82b0:5405:9623:e2f1:b2ac])
 by smtp.gmail.com with ESMTPSA id f14sm33788291wrv.72.2020.09.08.00.54.31
 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
 Tue, 08 Sep 2020 00:54:31 -0700 (PDT)
From: Neil Armstrong <narmstrong@baylibre.com>
To: thierry.reding@gmail.com,
	sam@ravnborg.org
Subject: [PATCH v3 4/4] drm: panel: add TDO tl070wsh30 panel driver
Date: Tue,  8 Sep 2020 09:54:21 +0200
Message-Id: <20200908075421.17344-5-narmstrong@baylibre.com>
X-Mailer: git-send-email 2.22.0
In-Reply-To: <20200908075421.17344-1-narmstrong@baylibre.com>
References: <20200908075421.17344-1-narmstrong@baylibre.com>
MIME-Version: 1.0
X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 
X-CRM114-CacheID: sfid-20200908_035433_742339_92824FEE 
X-CRM114-Status: GOOD (  22.12  )
X-Spam-Score: 0.0 (/)
X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary:
 Content analysis details:   (0.0 points)
 pts rule name              description
 ---- ----------------------
 --------------------------------------------------
 -0.0 RCVD_IN_DNSWL_NONE     RBL: Sender listed at https://www.dnswl.org/,
 no trust [2a00:1450:4864:20:0:0:0:342 listed in]
 [list.dnswl.org]
 0.0 SPF_HELO_NONE          SPF: HELO does not publish an SPF Record
 -0.0 SPF_PASS               SPF: sender matches SPF record
 0.1 DKIM_SIGNED            Message has a DKIM or DK signature,
 not necessarily
 valid
 -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature
X-BeenThere: linux-amlogic@lists.infradead.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <linux-amlogic.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-amlogic>,
 <mailto:linux-amlogic-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-amlogic/>
List-Post: <mailto:linux-amlogic@lists.infradead.org>
List-Help: <mailto:linux-amlogic-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-amlogic>,
 <mailto:linux-amlogic-request@lists.infradead.org?subject=subscribe>
Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
 dri-devel@lists.freedesktop.org, Neil Armstrong <narmstrong@baylibre.com>
Sender: "linux-amlogic" <linux-amlogic-bounces@lists.infradead.org>
Errors-To: 
 linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org

This adds support for the TDO TL070WSH30 TFT-LCD panel module.
The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/gpu/drm/panel/Kconfig                |  11 +
 drivers/gpu/drm/panel/Makefile               |   1 +
 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c | 250 +++++++++++++++++++
 3 files changed, 262 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 8d97d07c5871..2d488a875b99 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -433,6 +433,17 @@ config DRM_PANEL_SONY_ACX565AKM
 	  Say Y here if you want to enable support for the Sony ACX565AKM
 	  800x600 3.5" panel (found on the Nokia N900).
 
+config DRM_PANEL_TDO_TL070WSH30
+	tristate "TDO TL070WSH30 DSI 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 TDO TL070WSH30 TFT-LCD
+	  panel module. The panel has a 1024×600 resolution and uses
+	  24 bit RGB per pixel. It provides a MIPI DSI interface to
+	  the host, a built-in LED backlight and touch controller.
+
 config DRM_PANEL_TPO_TD028TTEC1
 	tristate "Toppoly (TPO) TD028TTEC1 panel driver"
 	depends on OF && SPI
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 15a4e7752951..35ee06a1b5c2 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
 obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o
 obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
+obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
diff --git a/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
new file mode 100644
index 000000000000..820731be7147
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct tdo_tl070wsh30_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+
+	bool prepared;
+};
+
+static inline
+struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct tdo_tl070wsh30_panel, base);
+}
+
+static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+	int err;
+
+	if (tdo_tl070wsh30->prepared)
+		return 0;
+
+	err = regulator_enable(tdo_tl070wsh30->supply);
+	if (err < 0)
+		return err;
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
+
+	msleep(200);
+
+	err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
+		regulator_disable(tdo_tl070wsh30->supply);
+		return err;
+	}
+
+	msleep(200);
+
+	err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set display on: %d\n", err);
+		regulator_disable(tdo_tl070wsh30->supply);
+		return err;
+	}
+
+	msleep(20);
+
+	tdo_tl070wsh30->prepared = true;
+
+	return 0;
+}
+
+static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+	int err;
+
+	if (!tdo_tl070wsh30->prepared)
+		return 0;
+
+	err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to set display off: %d\n", err);
+
+	usleep_range(10000, 11000);
+
+	err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
+		return err;
+	}
+
+	usleep_range(10000, 11000);
+
+	regulator_disable(tdo_tl070wsh30->supply);
+
+	tdo_tl070wsh30->prepared = false;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 47250,
+	.hdisplay = 1024,
+	.hsync_start = 1024 + 46,
+	.hsync_end = 1024 + 46 + 80,
+	.htotal = 1024 + 46 + 80 + 100,
+	.vdisplay = 600,
+	.vsync_start = 600 + 5,
+	.vsync_end = 600 + 5 + 5,
+	.vtotal = 600 + 5 + 5 + 20,
+	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
+};
+
+static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
+				       struct drm_connector *connector)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(&default_mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = 154;
+	connector->display_info.height_mm = 85;
+	connector->display_info.bpc = 8;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
+	.unprepare = tdo_tl070wsh30_panel_unprepare,
+	.prepare = tdo_tl070wsh30_panel_prepare,
+	.get_modes = tdo_tl070wsh30_panel_get_modes,
+};
+
+static const struct of_device_id tdo_tl070wsh30_of_match[] = {
+	{ .compatible = "tdo,tl070wsh30", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
+
+static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
+{
+	struct device *dev = &tdo_tl070wsh30->link->dev;
+	int err;
+
+	tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(tdo_tl070wsh30->supply))
+		return PTR_ERR(tdo_tl070wsh30->supply);
+
+	tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
+						    GPIOD_OUT_LOW);
+	if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
+		err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
+		dev_dbg(dev, "failed to get reset gpio: %d\n", err);
+		return err;
+	}
+
+	drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
+		       &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
+	if (err)
+		return err;
+
+	drm_panel_add(&tdo_tl070wsh30->base);
+
+	return 0;
+}
+
+static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
+	int err;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
+
+	tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
+				    GFP_KERNEL);
+	if (!tdo_tl070wsh30)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
+	tdo_tl070wsh30->link = dsi;
+
+	err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
+	if (err < 0)
+		return err;
+
+	return mipi_dsi_attach(dsi);
+}
+
+static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+	int err;
+
+	err = mipi_dsi_detach(dsi);
+	if (err < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+	drm_panel_remove(&tdo_tl070wsh30->base);
+	drm_panel_disable(&tdo_tl070wsh30->base);
+	drm_panel_unprepare(&tdo_tl070wsh30->base);
+
+	return 0;
+}
+
+static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_disable(&tdo_tl070wsh30->base);
+	drm_panel_unprepare(&tdo_tl070wsh30->base);
+}
+
+static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
+	.driver = {
+		.name = "panel-tdo-tl070wsh30",
+		.of_match_table = tdo_tl070wsh30_of_match,
+	},
+	.probe = tdo_tl070wsh30_panel_probe,
+	.remove = tdo_tl070wsh30_panel_remove,
+	.shutdown = tdo_tl070wsh30_panel_shutdown,
+};
+module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
+MODULE_LICENSE("GPL v2");