From patchwork Fri Mar  6 10:36:28 2020
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Harigovindan P <harigovi@codeaurora.org>
X-Patchwork-Id: 11423473
Return-Path: <SRS0=zoEw=4X=vger.kernel.org=linux-arm-msm-owner@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 98C0014E3
	for <patchwork-linux-arm-msm@patchwork.kernel.org>;
 Fri,  6 Mar 2020 10:36:58 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 6E84C2072D
	for <patchwork-linux-arm-msm@patchwork.kernel.org>;
 Fri,  6 Mar 2020 10:36:58 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1726108AbgCFKg5 (ORCPT
        <rfc822;patchwork-linux-arm-msm@patchwork.kernel.org>);
        Fri, 6 Mar 2020 05:36:57 -0500
Received: from alexa-out-blr-02.qualcomm.com ([103.229.18.198]:37044 "EHLO
        alexa-out-blr-02.qualcomm.com" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S1726025AbgCFKg5 (ORCPT
        <rfc822;linux-arm-msm@vger.kernel.org>);
        Fri, 6 Mar 2020 05:36:57 -0500
Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130])
  by alexa-out-blr-02.qualcomm.com with ESMTP/TLS/AES256-SHA;
 06 Mar 2020 16:06:52 +0530
Received: from harigovi-linux.qualcomm.com ([10.204.66.157])
  by ironmsg01-blr.qualcomm.com with ESMTP; 06 Mar 2020 16:06:41 +0530
Received: by harigovi-linux.qualcomm.com (Postfix, from userid 2332695)
        id 9B4B52619; Fri,  6 Mar 2020 16:06:39 +0530 (IST)
From: Harigovindan P <harigovi@codeaurora.org>
To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
        freedreno@lists.freedesktop.org, devicetree@vger.kernel.org
Cc: Harigovindan P <harigovi@codeaurora.org>, robdclark@gmail.com,
        seanpaul@chromium.org, sean@poorly.run
Subject: [PATCH v4 2/2] drm/panel: add support for rm69299 visionox panel
 driver
Date: Fri,  6 Mar 2020 16:06:28 +0530
Message-Id: <20200306103628.8998-3-harigovi@codeaurora.org>
X-Mailer: git-send-email 2.25.1
In-Reply-To: <20200306103628.8998-1-harigovi@codeaurora.org>
References: <20200306103628.8998-1-harigovi@codeaurora.org>
MIME-Version: 1.0
Sender: linux-arm-msm-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-arm-msm.vger.kernel.org>
X-Mailing-List: linux-arm-msm@vger.kernel.org

Add support for Visionox panel driver.

Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
---

Changes in v2:
	- Dropping redundant space in Kconfig(Sam Ravnborg).
	- Changing structure for include files(Sam Ravnborg).
	- Removing backlight related code and functions(Sam Ravnborg).
	- Removing repeated printing of error message(Sam Ravnborg).
	- Adding drm_connector as an argument for get_modes function.
Changes in v3:
	- Adding arguments for drm_panel_init to support against mainline.
Changes in v4:
	- Removing error messages from regulator_set_load.
	- Removing dev struct entry.
	- Removing checks.
	- Dropping empty comment lines.

 drivers/gpu/drm/panel/Kconfig                 |   8 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-visionox-rm69299.c    | 322 ++++++++++++++++++
 3 files changed, 331 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-visionox-rm69299.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index ae44ac2ec106..7b696f304a99 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -389,6 +389,14 @@ config DRM_PANEL_TRULY_NT35597_WQXGA
 	  Say Y here if you want to enable support for Truly NT35597 WQXGA Dual DSI
 	  Video Mode panel
 
+config DRM_PANEL_VISIONOX_RM69299
+	tristate "Visionox RM69299"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	help
+	  Say Y here if you want to enable support for Visionox
+	  RM69299  DSI Video Mode panel.
+
 config DRM_PANEL_XINPENG_XPP055C272
 	tristate "Xinpeng XPP055C272 panel driver"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 7c4d3c581fd4..9f11d067a6b2 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -41,4 +41,5 @@ obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
 obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
 obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o
+obj-$(CONFIG_DRM_PANEL_VISIONOX_RM69299) += panel-visionox-rm69299.o
 obj-$(CONFIG_DRM_PANEL_XINPENG_XPP055C272) += panel-xinpeng-xpp055c272.o
diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
new file mode 100644
index 000000000000..eb15dca15398
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+struct rm69299_config {
+	unsigned long width_mm;
+	unsigned long height_mm;
+	const char *panel_name;
+	u32 num_on_cmds;
+	const struct drm_display_mode *dm;
+};
+
+struct visionox_rm69299 {
+	struct drm_panel panel;
+
+	struct regulator_bulk_data supplies[2];
+
+	struct gpio_desc *reset_gpio;
+
+	struct mipi_dsi_device *dsi;
+	const struct rm69299_config *config;
+	bool prepared;
+	bool enabled;
+};
+
+static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
+{
+	return container_of(panel, struct visionox_rm69299, panel);
+}
+
+static int visionox_35597_power_on(struct visionox_rm69299 *ctx)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Reset sequence of visionox panel requires the panel to be
+	 * out of reset for 10ms, followed by being held in reset
+	 * for 10ms and then out again
+	 */
+	gpiod_set_value(ctx->reset_gpio, 1);
+	usleep_range(10000, 20000);
+	gpiod_set_value(ctx->reset_gpio, 0);
+	usleep_range(10000, 20000);
+	gpiod_set_value(ctx->reset_gpio, 1);
+	usleep_range(10000, 20000);
+
+	return 0;
+}
+
+static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
+{
+	gpiod_set_value(ctx->reset_gpio, 0);
+
+	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static int visionox_rm69299_unprepare(struct drm_panel *panel)
+{
+	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+	int ret;
+
+	ctx->dsi->mode_flags = 0;
+
+	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
+	if (ret < 0)
+		DRM_DEV_ERROR(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);
+
+	/* 120ms delay required here as per DCS spec */
+	msleep(120);
+
+	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+			"enter_sleep cmd failed ret = %d\n", ret);
+	}
+
+	ret = visionox_rm69299_power_off(ctx);
+
+	ctx->prepared = false;
+	return ret;
+}
+
+static int visionox_rm69299_prepare(struct drm_panel *panel)
+{
+	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+	int ret;
+	const struct rm69299_config *config;
+
+	if (ctx->prepared)
+		return 0;
+
+	ret = visionox_35597_power_on(ctx);
+	if (ret < 0)
+		return ret;
+
+	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	config = ctx->config;
+
+	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]){ 0xfe, 0x00 }, 2);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+		"cmd set tx 0 failed, ret = %d\n",
+		ret);
+		goto power_off;
+	}
+
+	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]){ 0xc2, 0x08 }, 2);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+		"cmd set tx 1 failed, ret = %d\n",
+		ret);
+		goto power_off;
+	}
+
+	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]){ 0x35, 0x00 }, 2);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+		"cmd set tx 2 failed, ret = %d\n",
+		ret);
+		goto power_off;
+	}
+
+	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]){ 0x51, 0xff }, 2);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+		"cmd set tx 3 failed, ret = %d\n",
+		ret);
+		goto power_off;
+	}
+
+	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+			"exit_sleep_mode cmd failed ret = %d\n",
+			ret);
+		goto power_off;
+	}
+
+	/* Per DSI spec wait 120ms after sending exit sleep DCS command */
+	msleep(120);
+
+	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->panel.dev,
+			"set_display_on cmd failed ret = %d\n", ret);
+		goto power_off;
+	}
+
+	/* Per DSI spec wait 120ms after sending set_display_on DCS command */
+	msleep(120);
+
+	ctx->prepared = true;
+
+	return 0;
+
+power_off:
+	return visionox_rm69299_power_off(ctx);
+}
+
+static int visionox_rm69299_get_modes(struct drm_panel *panel,
+				       struct drm_connector *connector)
+{
+	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+	struct drm_display_mode *mode;
+	const struct rm69299_config *config;
+
+	config = ctx->config;
+	mode = drm_mode_create(connector->dev);
+	if (!mode) {
+		DRM_DEV_ERROR(ctx->dev,
+			"failed to create a new display mode\n");
+		return 0;
+	}
+
+	connector->display_info.width_mm = config->width_mm;
+	connector->display_info.height_mm = config->height_mm;
+	drm_mode_copy(mode, config->dm);
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
+	.unprepare = visionox_rm69299_unprepare,
+	.prepare = visionox_rm69299_prepare,
+	.get_modes = visionox_rm69299_get_modes,
+};
+
+static const struct drm_display_mode qcom_sc7180_mtp_1080p_mode = {
+	.name = "1080x2248",
+	.clock = 158695,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 26,
+	.hsync_end = 1080 + 26 + 2,
+	.htotal = 1080 + 26 + 2 + 36,
+	.vdisplay = 2248,
+	.vsync_start = 2248 + 56,
+	.vsync_end = 2248 + 56 + 4,
+	.vtotal = 2248 + 56 + 4 + 4,
+	.vrefresh = 60,
+	.flags = 0,
+};
+
+static const struct rm69299_config rm69299_dir = {
+	.width_mm = 74,
+	.height_mm = 131,
+	.panel_name = "qcom_sc7180_mtp_1080p_panel",
+	.dm = &qcom_sc7180_mtp_1080p_mode,
+};
+
+static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct visionox_rm69299 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+
+	if (!ctx)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	ctx->supplies[0].supply = "vdda";
+	ctx->supplies[1].supply = "vdd3p3";
+
+	ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
+								ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio)) {
+		DRM_DEV_ERROR(dev, "cannot get reset gpio %ld\n",
+					PTR_ERR(ctx->reset_gpio));
+		return PTR_ERR(ctx->reset_gpio);
+	}
+
+	drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.dev = dev;
+	ctx->panel.funcs = &visionox_rm69299_drm_funcs;
+	drm_panel_add(&ctx->panel);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
+		MIPI_DSI_CLOCK_NON_CONTINUOUS;
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev,
+			"dsi attach failed ret = %d\n", ret);
+		goto err_dsi_attach;
+	}
+
+	ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
+	if (ret)
+		return ret;
+
+	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
+	if (ret)
+		return ret;
+
+	return 0;
+
+err_dsi_attach:
+	drm_panel_remove(&ctx->panel);
+	return ret;
+}
+
+static int visionox_rm69299_remove(struct mipi_dsi_device *dsi)
+{
+	struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	mipi_dsi_detach(ctx->dsi);
+	mipi_dsi_device_unregister(ctx->dsi);
+
+	drm_panel_remove(&ctx->panel);
+	return 0;
+}
+
+static const struct of_device_id visionox_rm69299_of_match[] = {
+	{
+		.compatible = "visionox,rm69299-1080p-display",
+		.data = &rm69299_dir,
+	},
+};
+MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
+
+static struct mipi_dsi_driver visionox_rm69299_driver = {
+	.driver = {
+		.name = "panel-visionox-rm69299",
+		.of_match_table = visionox_rm69299_of_match,
+	},
+	.probe = visionox_rm69299_probe,
+	.remove = visionox_rm69299_remove,
+};
+module_mipi_dsi_driver(visionox_rm69299_driver);
+
+MODULE_DESCRIPTION("VISIONOX RM69299 DSI Panel Driver");
+MODULE_LICENSE("GPL v2");
+