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drm/panel: Add Novatek NT36536 panel driver
Add a driver for panels using the Novatek NT36536 Display Driver IC, including support for the CSOT PP8807HB1-1, a dual-link 10-bit panel found in LENOVO Legion Y700 Gen4. Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patch.msgid.link/20260709142846.12463-3-mitltlatltl@gmail.com
This commit is contained in:
Pengyu Luo
committed by
Neil Armstrong
Neil Armstrong
parent
38873dd528
commit
75a5dbd1f4
@@ -662,6 +662,17 @@ config DRM_PANEL_NOVATEK_NT36523
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around the Novatek NT36523 display controller, such as some
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Boe panels used in Xiaomi Mi Pad 5 and 5 Pro tablets.
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config DRM_PANEL_NOVATEK_NT36536
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tristate "Novatek NT36536 panel driver"
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depends on OF
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depends on DRM_MIPI_DSI
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depends on BACKLIGHT_CLASS_DEVICE
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select DRM_KMS_HELPER
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help
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Say Y here if you want to enable support for Novatek NT36536-based
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display panels, such as the one found in the LENOVO Legion Y700
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Gen4.
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config DRM_PANEL_NOVATEK_NT36672A
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tristate "Novatek NT36672A DSI panel"
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depends on GPIOLIB
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@@ -64,6 +64,7 @@ obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35532) += panel-novatek-nt35532.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35560) += panel-novatek-nt35560.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35950) += panel-novatek-nt35950.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36523) += panel-novatek-nt36523.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36536) += panel-novatek-nt36536.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36672A) += panel-novatek-nt36672a.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36672E) += panel-novatek-nt36672e.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT37700F) += panel-novatek-nt37700f.o
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488
drivers/gpu/drm/panel/panel-novatek-nt36536.c
Normal file
488
drivers/gpu/drm/panel/panel-novatek-nt36536.c
Normal file
@@ -0,0 +1,488 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Novatek NT36536 DriverIC panels driver
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* Copyright (c) 2026 Pengyu Luo <mitltlatltl@gmail.com>
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*
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* Based on the sample code which is generated with
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* linux-mdss-dsi-panel-driver-generator
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/device-id/of.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/regulator/consumer.h>
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#include <drm/display/drm_dsc.h>
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#include <drm/display/drm_dsc_helper.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_probe_helper.h>
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#include <video/mipi_display.h>
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struct novatek {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi[2];
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const struct panel_desc *desc;
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struct drm_dsc_config dsc;
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struct gpio_desc *reset_gpio;
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struct regulator_bulk_data *supplies;
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struct backlight_device *backlight;
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};
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struct panel_desc {
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unsigned int width_mm;
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unsigned int height_mm;
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unsigned int bpc;
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unsigned int lanes;
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enum mipi_dsi_pixel_format format;
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unsigned long mode_flags;
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const struct drm_dsc_config *dsc_cfg;
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const struct drm_display_mode *modes;
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unsigned int num_modes;
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int (*init_sequence)(struct mipi_dsi_multi_context *dsi_ctx);
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bool is_dual_dsi;
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bool has_dcs_backlight;
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};
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static const struct regulator_bulk_data novatek_supplies[] = {
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{ .supply = "vddio" },
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{ .supply = "vsp" },
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{ .supply = "vsn" },
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};
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static inline struct novatek *to_novatek(struct drm_panel *panel)
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{
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return container_of(panel, struct novatek, panel);
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}
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static inline struct mipi_dsi_device *to_primary_dsi(struct novatek *ctx)
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{
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/* Sync on DSI1 for dual dsi */
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return ctx->desc->is_dual_dsi ? ctx->dsi[1] : ctx->dsi[0];
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}
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static void novatek_reset(struct novatek *ctx)
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{
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(11000, 12000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(1000, 2000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(3000, 4000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(10000, 11000);
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}
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static int novatek_prepare(struct drm_panel *panel)
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{
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struct novatek *ctx = to_novatek(panel);
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struct mipi_dsi_device *dsi = to_primary_dsi(ctx);
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
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struct drm_dsc_picture_parameter_set pps;
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struct device *dev = &dsi->dev;
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(novatek_supplies),
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ctx->supplies);
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if (ret < 0)
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return ret;
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novatek_reset(ctx);
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ret = ctx->desc->init_sequence(&dsi_ctx);
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if (ret < 0) {
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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regulator_bulk_disable(ARRAY_SIZE(novatek_supplies),
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ctx->supplies);
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return ret;
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}
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drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
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mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
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mipi_dsi_compression_mode_multi(&dsi_ctx, true);
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mipi_dsi_msleep(&dsi_ctx, 28);
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return backlight_enable(ctx->backlight);
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}
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static int novatek_off(struct mipi_dsi_multi_context *dsi_ctx)
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{
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mipi_dsi_dcs_set_display_off_multi(dsi_ctx);
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mipi_dsi_dcs_enter_sleep_mode_multi(dsi_ctx);
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return dsi_ctx->accum_err;
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}
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static int novatek_unprepare(struct drm_panel *panel)
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{
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struct novatek *ctx = to_novatek(panel);
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struct mipi_dsi_device *dsi = to_primary_dsi(ctx);
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
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struct device *dev = &dsi->dev;
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int ret;
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backlight_disable(ctx->backlight);
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ret = novatek_off(&dsi_ctx);
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if (ret < 0)
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dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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regulator_bulk_disable(ARRAY_SIZE(novatek_supplies), ctx->supplies);
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return 0;
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}
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static int novatek_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct novatek *ctx = to_novatek(panel);
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const struct panel_desc *desc = ctx->desc;
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int i;
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for (i = 0; i < desc->num_modes; i++) {
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const struct drm_display_mode *m = &desc->modes[i];
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, m);
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if (!mode) {
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dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
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m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
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return -ENOMEM;
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}
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mode->type = DRM_MODE_TYPE_DRIVER;
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if (i == 0)
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mode->type |= DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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}
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connector->display_info.width_mm = desc->width_mm;
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connector->display_info.height_mm = desc->height_mm;
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connector->display_info.bpc = desc->bpc;
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return desc->num_modes;
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}
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static const struct drm_panel_funcs novatek_panel_funcs = {
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.prepare = novatek_prepare,
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.unprepare = novatek_unprepare,
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.get_modes = novatek_get_modes,
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};
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static int novatek_bl_update_status(struct backlight_device *bl)
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{
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struct novatek *ctx = bl_get_data(bl);
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u16 brightness = backlight_get_brightness(bl);
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return mipi_dsi_dcs_set_display_brightness_large(to_primary_dsi(ctx),
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brightness);
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}
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static const struct backlight_ops novatek_bl_ops = {
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.update_status = novatek_bl_update_status,
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};
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static struct backlight_device *novatek_create_backlight(struct novatek *ctx)
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{
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struct mipi_dsi_device *dsi = to_primary_dsi(ctx);
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struct device *dev = &dsi->dev;
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const struct backlight_properties props = {
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.type = BACKLIGHT_RAW,
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.brightness = 512,
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.max_brightness = 4095,
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.scale = BACKLIGHT_SCALE_NON_LINEAR,
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};
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return devm_backlight_device_register(dev, dev_name(dev), dev, ctx,
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&novatek_bl_ops, &props);
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}
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static int csot_pp8807hb1_1_init_seq(struct mipi_dsi_multi_context *dsi_ctx)
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{
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x20);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_SET_PARTIAL_ROWS, 0x50);
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/* cabc */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x23);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x89, 0xa4);
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/* pen code */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x26);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xcd, 0x8f, 0xa9, 0x00);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xce, 0x8c, 0xa9, 0x00);
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/* esd init */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x27);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x79, 0x22);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd0, 0x31);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd1, 0x08, 0x08);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd2, 0x08);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0xd0);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x00, 0x31);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x09, 0xee);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x1c, 0x77);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x1d, 0x07);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0xe0);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbb, 0x00);
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/* IC transfer */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0xf0);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe6, 0x02);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xff, 0x10);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xfb, 0x01);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x3b,
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0x03, 0x4e, 0x1a, 0x04, 0x04, 0x01, 0x80,
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0x36, 0x36);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x60, 0x00);
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/* enable DSC */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x90, 0x03, 0x00);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x91,
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0xab, 0xa8, 0x00, 0x14, 0xd2, 0x00, 0x00,
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0x00, 0x01, 0xb9, 0x00, 0x06, 0x05, 0x7a,
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0x05, 0xb8);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x92, 0x10, 0xe0);
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/* frame ctl */
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0x91, 0x80);
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mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb3, 0x40);
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mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
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mipi_dsi_msleep(dsi_ctx, 105);
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mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
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mipi_dsi_msleep(dsi_ctx, 40);
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return dsi_ctx->accum_err;
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}
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static struct drm_dsc_config csot_pp8807hb1_1_dsc_cfg = {
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.dsc_version_major = 1,
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.dsc_version_minor = 2,
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.slice_height = 20,
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.slice_width = 476,
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.slice_count = 2,
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.bits_per_component = 10,
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.bits_per_pixel = 8 << 4,
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.block_pred_enable = true,
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};
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static const struct drm_display_mode csot_pp8807hb1_1_modes[] = {
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/* 915552 KHz */
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{
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.clock = (952 + 138 + 16 + 16) * 2 * (3040 + 26 + 4 + 330) * 120 / 1000,
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.hdisplay = 952 * 2,
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.hsync_start = (952 + 138) * 2,
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.hsync_end = (952 + 138 + 16) * 2,
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.htotal = (952 + 138 + 16 + 16) * 2,
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.vdisplay = 3040,
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.vsync_start = 3040 + 26,
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.vsync_end = 3040 + 26 + 4,
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.vtotal = 3040 + 26 + 4 + 330,
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},
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{
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.clock = (952 + 138 + 16 + 16) * 2 * (3040 + 3426 + 4 + 330) * 60 / 1000,
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.hdisplay = 952 * 2,
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.hsync_start = (952 + 138) * 2,
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.hsync_end = (952 + 138 + 16) * 2,
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.htotal = (952 + 138 + 16 + 16) * 2,
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.vdisplay = 3040,
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.vsync_start = 3040 + 3426,
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.vsync_end = 3040 + 3426 + 4,
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.vtotal = 3040 + 3426 + 4 + 330,
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},
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{
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.clock = (952 + 138 + 16 + 16) * 2 * (3040 + 10226 + 4 + 330) * 30 / 1000,
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.hdisplay = 952 * 2,
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.hsync_start = (952 + 138) * 2,
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.hsync_end = (952 + 138 + 16) * 2,
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.htotal = (952 + 138 + 16 + 16) * 2,
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.vdisplay = 3040,
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.vsync_start = 3040 + 10226,
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.vsync_end = 3040 + 10226 + 4,
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.vtotal = 3040 + 10226 + 4 + 330,
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},
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/* 1064606.4 KHz */
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{
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.clock = (952 + 50 + 16 + 16) * 2 * (3040 + 26 + 4 + 50) * 165 / 1000,
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.hdisplay = 952 * 2,
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.hsync_start = (952 + 50) * 2,
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.hsync_end = (952 + 50 + 16) * 2,
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.htotal = (952 + 50 + 16 + 16) * 2,
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.vdisplay = 3040,
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.vsync_start = 3040 + 26,
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.vsync_end = 3040 + 26 + 4,
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.vtotal = 3040 + 26 + 4 + 50,
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},
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{
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.clock = (952 + 50 + 16 + 16) * 2 * (3040 + 481 + 4 + 50) * 144 / 1000,
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.hdisplay = 952 * 2,
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.hsync_start = (952 + 50) * 2,
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.hsync_end = (952 + 50 + 16) * 2,
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.htotal = (952 + 50 + 16 + 16) * 2,
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.vdisplay = 3040,
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.vsync_start = 3040 + 481,
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.vsync_end = 3040 + 481 + 4,
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.vtotal = 3040 + 481 + 4 + 50,
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},
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/* 737942.4 KHz */
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{
|
||||
.clock = (952 + 330 + 16 + 16) * 2 * (3040 + 26 + 4 + 50) * 90 / 1000,
|
||||
.hdisplay = 952 * 2,
|
||||
.hsync_start = (952 + 330) * 2,
|
||||
.hsync_end = (952 + 330 + 16) * 2,
|
||||
.htotal = (952 + 330 + 16 + 16) * 2,
|
||||
.vdisplay = 3040,
|
||||
.vsync_start = 3040 + 26,
|
||||
.vsync_end = 3040 + 26 + 4,
|
||||
.vtotal = 3040 + 26 + 4 + 50,
|
||||
},
|
||||
};
|
||||
|
||||
static int novatek_probe(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct mipi_dsi_device_info dsi_info = {"dsi-secondary", 0, NULL};
|
||||
struct mipi_dsi_host *dsi1_host;
|
||||
struct device *dev = &dsi->dev;
|
||||
const struct panel_desc *desc;
|
||||
struct device_node *dsi1;
|
||||
struct novatek *ctx;
|
||||
int num_dsi = 1;
|
||||
int ret, i;
|
||||
|
||||
ctx = devm_drm_panel_alloc(dev, struct novatek, panel,
|
||||
&novatek_panel_funcs,
|
||||
DRM_MODE_CONNECTOR_DSI);
|
||||
if (IS_ERR(ctx))
|
||||
return PTR_ERR(ctx);
|
||||
|
||||
ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(novatek_supplies),
|
||||
novatek_supplies, &ctx->supplies);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ctx->reset_gpio))
|
||||
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
|
||||
"Failed to get reset-gpios\n");
|
||||
|
||||
desc = of_device_get_match_data(dev);
|
||||
if (!desc)
|
||||
return -ENODEV;
|
||||
ctx->desc = desc;
|
||||
ctx->dsc = *desc->dsc_cfg;
|
||||
|
||||
if (desc->is_dual_dsi) {
|
||||
num_dsi = 2;
|
||||
dsi1 = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
|
||||
if (!dsi1) {
|
||||
dev_err(dev, "cannot get secondary DSI node.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
dsi1_host = of_find_mipi_dsi_host_by_node(dsi1);
|
||||
of_node_put(dsi1);
|
||||
if (!dsi1_host)
|
||||
return dev_err_probe(dev, -EPROBE_DEFER,
|
||||
"cannot get secondary DSI host\n");
|
||||
|
||||
ctx->dsi[1] = devm_mipi_dsi_device_register_full(dev, dsi1_host,
|
||||
&dsi_info);
|
||||
if (IS_ERR(ctx->dsi[1])) {
|
||||
dev_err(dev, "cannot get secondary DSI device\n");
|
||||
return PTR_ERR(ctx->dsi[1]);
|
||||
}
|
||||
|
||||
mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
|
||||
}
|
||||
|
||||
ctx->dsi[0] = dsi;
|
||||
mipi_dsi_set_drvdata(dsi, ctx);
|
||||
|
||||
ctx->panel.prepare_prev_first = true;
|
||||
|
||||
ret = devm_drm_panel_add(dev, &ctx->panel);
|
||||
if (ret < 0)
|
||||
return dev_err_probe(dev, ret, "failed to add panel\n");
|
||||
|
||||
for (i = 0; i < num_dsi; i++) {
|
||||
ctx->dsi[i]->lanes = desc->lanes;
|
||||
ctx->dsi[i]->format = desc->format;
|
||||
ctx->dsi[i]->mode_flags = desc->mode_flags;
|
||||
ctx->dsi[i]->dsc = &ctx->dsc;
|
||||
ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]);
|
||||
if (ret < 0) {
|
||||
drm_panel_remove(&ctx->panel);
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to attach to DSI host\n");
|
||||
}
|
||||
}
|
||||
|
||||
if (desc->has_dcs_backlight) {
|
||||
ctx->backlight = novatek_create_backlight(ctx);
|
||||
if (IS_ERR(ctx->backlight))
|
||||
return dev_err_probe(dev, PTR_ERR(ctx->backlight),
|
||||
"Failed to create backlight\n");
|
||||
} else {
|
||||
ret = drm_panel_of_backlight(&ctx->panel);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to get backlight\n");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Model name: CSOT PP8807HB1-1 */
|
||||
static const struct panel_desc csot_pp8807hb1_1_desc = {
|
||||
.width_mm = 118,
|
||||
.height_mm = 190,
|
||||
.bpc = 10, /* set this to 8 with RGB888 format to support 8-bit mode */
|
||||
.lanes = 3,
|
||||
.format = MIPI_DSI_FMT_RGB101010,
|
||||
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
|
||||
MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_BURST |
|
||||
MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT,
|
||||
.dsc_cfg = &csot_pp8807hb1_1_dsc_cfg,
|
||||
.modes = csot_pp8807hb1_1_modes,
|
||||
.num_modes = ARRAY_SIZE(csot_pp8807hb1_1_modes),
|
||||
.init_sequence = csot_pp8807hb1_1_init_seq,
|
||||
.is_dual_dsi = true,
|
||||
.has_dcs_backlight = false,
|
||||
};
|
||||
|
||||
static const struct of_device_id novatek_of_match[] = {
|
||||
{ .compatible = "csot,pp8807hb1-1", .data = &csot_pp8807hb1_1_desc },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, novatek_of_match);
|
||||
|
||||
static struct mipi_dsi_driver novatek_driver = {
|
||||
.probe = novatek_probe,
|
||||
.driver = {
|
||||
.name = "panel-novatek-nt36536",
|
||||
.of_match_table = novatek_of_match,
|
||||
},
|
||||
};
|
||||
module_mipi_dsi_driver(novatek_driver);
|
||||
|
||||
MODULE_AUTHOR("Pengyu Luo <mitltlatltl@gmail.com>");
|
||||
MODULE_DESCRIPTION("Novatek NT36536 DriverIC panels driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Reference in New Issue
Block a user