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/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"); +