[v5,2/2] drm/panel: add support for rm69299 visionox panel driver
diff mbox series

Message ID 20200309052304.23427-3-harigovi@codeaurora.org
State Superseded
Headers show
Series
  • Add support for rm69299 Visionox panel driver and add devicetree bindings for visionox panel
Related show

Commit Message

Harigovindan P March 9, 2020, 5:23 a.m. UTC
Add support for Visionox panel driver.

Signed-off-by: Harigovindan P <harigovi@codeaurora.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.
Changes in v5:
	- Removing unused struct member variables.
	- Removing blank lines.
	- Fixed indentation.
	- Invoking dsi_detach and panel_remove while early exiting from probe.

 drivers/gpu/drm/panel/Kconfig                 |   8 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-visionox-rm69299.c    | 315 ++++++++++++++++++
 3 files changed, 324 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-visionox-rm69299.c

Comments

Matthias Kaehlcke March 9, 2020, 5:05 p.m. UTC | #1
Hi,

On Mon, Mar 09, 2020 at 10:53:04AM +0530, Harigovindan P wrote:
> Add support for Visionox panel driver.
> 
> Signed-off-by: Harigovindan P <harigovi@codeaurora.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.
> Changes in v5:
> 	- Removing unused struct member variables.
> 	- Removing blank lines.
> 	- Fixed indentation.
> 	- Invoking dsi_detach and panel_remove while early exiting from probe.
> 
>  drivers/gpu/drm/panel/Kconfig                 |   8 +
>  drivers/gpu/drm/panel/Makefile                |   1 +
>  .../gpu/drm/panel/panel-visionox-rm69299.c    | 315 ++++++++++++++++++
>  3 files changed, 324 insertions(+)
>  create mode 100644 drivers/gpu/drm/panel/panel-visionox-rm69299.c
>
> ...
>
> 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..2bd3af46d933
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
>
> ...
>
> +static int visionox_35597_power_on(struct visionox_rm69299 *ctx)
> +{

s/35597/rm69299/ ?

> +static const struct rm69299_config rm69299_dir = {
> +	.width_mm = 74,
> +	.height_mm = 131,
> +	.dm = &visionox_rm69299_1080x2248_60hz,
> +};

Are there actually variants of the panel with different sizes? So far the
driver supports a single type of panel, so I would say struct rm69299_config
is not needed. It can be added later if the driver ever gets support for
other panel variants. For now just assign the values directly in
'visionox_rm69299_get_modes'.

> +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);

nit: alignment is odd, either align with a tab after 'devm_regulator_bulk_get'
or with 'ctx->panel.dev'.

> +	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) {
> +		mipi_dsi_detach(dsi);
> +		drm_panel_remove(&ctx->panel);

that's technically correct, but since you have the 'goto' above and do the
same unwinding for the other 'regulator_set_load' call below it would be
better to use a 'goto' here (and below) too. Actually the 'goto' above only
makes sense if 'goto' is also used for the other cases.

> +		return ret;
> +	}
> +
> +	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
> +	if (ret) {
> +		mipi_dsi_detach(dsi);
> +		drm_panel_remove(&ctx->panel);
> +		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");

As commented on v4, this should be 'Visionox'.

Patch
diff mbox series

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..2bd3af46d933
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -0,0 +1,315 @@ 
+// 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 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 ret;
+}
+
+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 = 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 visionox_rm69299_1080x2248_60hz = {
+	.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,
+	.dm = &visionox_rm69299_1080x2248_60hz,
+};
+
+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) {
+		mipi_dsi_detach(dsi);
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
+	if (ret) {
+		mipi_dsi_detach(dsi);
+		drm_panel_remove(&ctx->panel);
+		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");
+