Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm: panel: Add Samsung S6E8FC0 DSI controller for M1906F9 panel
Add driver for Samsung S6E8FC0 DSI controller for M1906F9 video mode panel,
found in Xiaomi Mi A3 mobile phone.
Co-developed-by: Kamil Gołda <kamil.golda@protonmail.com>
Signed-off-by: Kamil Gołda <kamil.golda@protonmail.com>
Reviewed-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Yedaya Katsman <yedaya.ka@gmail.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260320-panel-patches-v7-2-3eaefc4b3878@gmail.com
authored by
Yedaya Katsman
and committed by
Neil Armstrong
49837b6b
f4693b88
+320
+5
MAINTAINERS
+5
MAINTAINERS
···
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F: Documentation/devicetree/bindings/display/panel/samsung,s6e3ha8.yaml
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F: drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c
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+
DRM DRIVER FOR SAMSUNG S6E8FC0 PANELS
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M: Yedaya Katsman <yedaya.ka@gmail.com>
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S: Maintained
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F: drivers/gpu/drm/panel/panel-samsung-s6e8fc0-m1906f9.c
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DRM DRIVER FOR SAMSUNG SOFEF00 DDIC
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M: David Heidelberg <david@ixit.cz>
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M: Casey Connolly <casey.connolly@linaro.org>
+13
drivers/gpu/drm/panel/Kconfig
+13
drivers/gpu/drm/panel/Kconfig
···
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~5.6 inch AMOLED display, and the controller is driven by the MIPI
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DSI protocol with 4 lanes.
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config DRM_PANEL_SAMSUNG_S6E8FC0
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tristate "Samsung S6E8FC0 DSI controller"
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depends on OF
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depends on BACKLIGHT_CLASS_DEVICE
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select DRM_MIPI_DSI
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help
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Say Y or M here if you want to enable support for the Samsung
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S6E8FC0 DSI controller and connected panel.
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Currently supported panels:
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M1906F9 (M1906F9SH or M1906F9SI), 6.09 inch 720x1560, found
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in the Xiaomi Mi A3 smartphone (xiaomi-laurel).
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config DRM_PANEL_SAMSUNG_SOFEF00
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tristate "Samsung SOFEF00 DSI panel controller"
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depends on OF
+1
drivers/gpu/drm/panel/Makefile
+1
drivers/gpu/drm/panel/Makefile
···
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA5X01_AMS561RA01) += panel-samsung-s6e8aa5x01-ams561ra01.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8FC0) += panel-samsung-s6e8fc0-m1906f9.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF00) += panel-samsung-sofef00.o
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obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
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obj-$(CONFIG_DRM_PANEL_SHARP_LQ079L1SX01) += panel-sharp-lq079l1sx01.o
+301
drivers/gpu/drm/panel/panel-samsung-s6e8fc0-m1906f9.c
+301
drivers/gpu/drm/panel/panel-samsung-s6e8fc0-m1906f9.c
···
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+
// SPDX-License-Identifier: GPL-2.0-only
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+
// Copyright (c) Kamil Gołda <kamil.golda@protonmail.com>
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// Copyright (c) Yedaya Katsman <yedaya.ka@gmail.com>
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// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
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// Copyright (c) The Linux Foundation. All rights reserved.
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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/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/regulator/consumer.h>
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+
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#include <video/mipi_display.h>
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+
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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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+
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struct s6e8fc0_ctx {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi;
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struct regulator_bulk_data *supplies;
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struct gpio_desc *reset_gpio;
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};
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+
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static const struct regulator_bulk_data s6e8fc0_supplies[] = {
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{ .supply = "vdd" },
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{ .supply = "vci" },
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};
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+
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static inline
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struct s6e8fc0_ctx *to_s6e8fc0_ctx(struct drm_panel *panel)
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+
{
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return container_of_const(panel, struct s6e8fc0_ctx, panel);
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}
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+
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static void s6e8fc0_m1906f9_reset(struct s6e8fc0_ctx *ctx)
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{
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(12000, 13000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(2000, 3000);
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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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+
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#define s6e8fc0_test_key_on_lvl2(ctx) \
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mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a)
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#define s6e8fc0_test_key_off_lvl2(ctx) \
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mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5)
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#define s6e8fc0_test_key_on_lvl3(ctx) \
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mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0x5a, 0x5a)
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#define s6e8fc0_test_key_off_lvl3(ctx) \
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mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0xa5, 0xa5)
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+
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static int s6e8fc0_m1906f9_on(struct s6e8fc0_ctx *ctx)
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{
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
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+
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s6e8fc0_test_key_on_lvl3(&dsi_ctx);
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+
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mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x0000);
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
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0x20);
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mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
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mipi_dsi_msleep(&dsi_ctx, 50);
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mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
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+
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x04, 0xed);
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xed,
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0xe4, 0x08, 0x96, 0xa4, 0x2a, 0x72, 0xe2,
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0xca, 0x00);
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s6e8fc0_test_key_off_lvl3(&dsi_ctx);
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s6e8fc0_test_key_on_lvl2(&dsi_ctx);
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s6e8fc0_test_key_on_lvl3(&dsi_ctx);
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1, 0x93);
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x05, 0xf4);
80
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 0x03);
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mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xed, 0x01, 0x81, 0x04);
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s6e8fc0_test_key_off_lvl2(&dsi_ctx);
83
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s6e8fc0_test_key_off_lvl3(&dsi_ctx);
84
+
85
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return dsi_ctx.accum_err;
86
+
}
87
+
88
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static int s6e8fc0_m1906f9_off(struct s6e8fc0_ctx *ctx)
89
+
{
90
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
91
+
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mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
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mipi_dsi_msleep(&dsi_ctx, 20);
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mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
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mipi_dsi_msleep(&dsi_ctx, 120);
96
+
97
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return dsi_ctx.accum_err;
98
+
}
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+
100
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static int s6e8fc0_m1906f9_prepare(struct drm_panel *panel)
101
+
{
102
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struct s6e8fc0_ctx *ctx = to_s6e8fc0_ctx(panel);
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struct device *dev = &ctx->dsi->dev;
104
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int ret;
105
+
106
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ret = regulator_bulk_enable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies);
107
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if (ret < 0) {
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dev_err(dev, "Failed to enable regulators: %d\n", ret);
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return ret;
110
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}
111
+
112
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s6e8fc0_m1906f9_reset(ctx);
113
+
114
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ret = s6e8fc0_m1906f9_on(ctx);
115
+
if (ret < 0) {
116
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
117
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
118
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regulator_bulk_disable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies);
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return ret;
120
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}
121
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122
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return 0;
123
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}
124
+
125
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static int s6e8fc0_m1906f9_unprepare(struct drm_panel *panel)
126
+
{
127
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struct s6e8fc0_ctx *ctx = to_s6e8fc0_ctx(panel);
128
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struct device *dev = &ctx->dsi->dev;
129
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int ret;
130
+
131
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ret = s6e8fc0_m1906f9_off(ctx);
132
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if (ret < 0)
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dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
134
+
135
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
136
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regulator_bulk_disable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies);
137
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return 0;
139
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}
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+
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static const struct drm_display_mode s6e8fc0_m1906f9_samsungp_mode = {
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.clock = (720 + 350 + 40 + 294) * (1560 + 17 + 2 + 5) * 60 / 1000,
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.hdisplay = 720,
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.hsync_start = 720 + 350,
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.hsync_end = 720 + 350 + 40,
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.htotal = 720 + 350 + 40 + 294,
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.vdisplay = 1560,
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.vsync_start = 1560 + 17,
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.vsync_end = 1560 + 17 + 2,
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.vtotal = 1560 + 17 + 2 + 5,
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.width_mm = 65,
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.height_mm = 140,
153
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.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
154
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};
155
+
156
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static int s6e8fc0_m1906f9_get_modes(struct drm_panel *panel,
157
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struct drm_connector *connector)
158
+
{
159
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return drm_connector_helper_get_modes_fixed(connector, &s6e8fc0_m1906f9_samsungp_mode);
160
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}
161
+
162
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static const struct drm_panel_funcs s6e8fc0_m1906f9_panel_funcs = {
163
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.prepare = s6e8fc0_m1906f9_prepare,
164
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.unprepare = s6e8fc0_m1906f9_unprepare,
165
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.get_modes = s6e8fc0_m1906f9_get_modes,
166
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};
167
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168
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static int s6e8fc0_bl_update_status(struct backlight_device *bl)
169
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{
170
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struct mipi_dsi_device *dsi = bl_get_data(bl);
171
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u16 brightness = backlight_get_brightness(bl);
172
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int ret;
173
+
174
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
175
+
176
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ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
177
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if (ret < 0)
178
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return ret;
179
+
180
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
181
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182
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return 0;
183
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}
184
+
185
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static int s6e8fc0_bl_get_brightness(struct backlight_device *bl)
186
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{
187
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struct mipi_dsi_device *dsi = bl_get_data(bl);
188
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u16 brightness;
189
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int ret;
190
+
191
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
192
+
193
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ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
194
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if (ret < 0)
195
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return ret;
196
+
197
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
198
+
199
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return brightness;
200
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}
201
+
202
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static const struct backlight_ops s6e8fc0_bl_ops = {
203
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.update_status = s6e8fc0_bl_update_status,
204
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.get_brightness = s6e8fc0_bl_get_brightness,
205
+
};
206
+
207
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static struct backlight_device *
208
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s6e8fc0_m1906f9_create_backlight(struct mipi_dsi_device *dsi)
209
+
{
210
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struct device *dev = &dsi->dev;
211
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const struct backlight_properties props = {
212
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.type = BACKLIGHT_RAW,
213
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.brightness = 512,
214
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.max_brightness = 1023,
215
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};
216
+
217
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return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
218
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&s6e8fc0_bl_ops, &props);
219
+
}
220
+
221
+
static int s6e8fc0_m1906f9_probe(struct mipi_dsi_device *dsi)
222
+
{
223
+
struct device *dev = &dsi->dev;
224
+
struct s6e8fc0_ctx *ctx;
225
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int ret;
226
+
227
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ctx = devm_drm_panel_alloc(dev, struct s6e8fc0_ctx, panel,
228
+
&s6e8fc0_m1906f9_panel_funcs,
229
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DRM_MODE_CONNECTOR_DSI);
230
+
if (IS_ERR(ctx))
231
+
return PTR_ERR(ctx);
232
+
233
+
ret = devm_regulator_bulk_get_const(dev,
234
+
ARRAY_SIZE(s6e8fc0_supplies),
235
+
s6e8fc0_supplies,
236
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&ctx->supplies);
237
+
if (ret < 0)
238
+
return ret;
239
+
240
+
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
241
+
if (IS_ERR(ctx->reset_gpio))
242
+
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
243
+
"Failed to get reset-gpios\n");
244
+
245
+
ctx->dsi = dsi;
246
+
mipi_dsi_set_drvdata(dsi, ctx);
247
+
248
+
dsi->lanes = 4;
249
+
dsi->format = MIPI_DSI_FMT_RGB888;
250
+
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
251
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MIPI_DSI_CLOCK_NON_CONTINUOUS;
252
+
253
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ctx->panel.prepare_prev_first = true;
254
+
255
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ctx->panel.backlight = s6e8fc0_m1906f9_create_backlight(dsi);
256
+
if (IS_ERR(ctx->panel.backlight))
257
+
return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
258
+
"Failed to create backlight\n");
259
+
260
+
drm_panel_add(&ctx->panel);
261
+
262
+
ret = mipi_dsi_attach(dsi);
263
+
if (ret < 0) {
264
+
drm_panel_remove(&ctx->panel);
265
+
return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
266
+
}
267
+
268
+
return 0;
269
+
}
270
+
271
+
static void s6e8fc0_remove(struct mipi_dsi_device *dsi)
272
+
{
273
+
struct s6e8fc0_ctx *ctx = mipi_dsi_get_drvdata(dsi);
274
+
int ret;
275
+
276
+
ret = mipi_dsi_detach(dsi);
277
+
if (ret < 0)
278
+
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
279
+
280
+
drm_panel_remove(&ctx->panel);
281
+
}
282
+
283
+
static const struct of_device_id samsung_s6e8fc0_of_match[] = {
284
+
{ .compatible = "samsung,s6e8fc0-m1906f9" },
285
+
{ /* sentinel */ }
286
+
};
287
+
MODULE_DEVICE_TABLE(of, samsung_s6e8fc0_of_match);
288
+
289
+
static struct mipi_dsi_driver s6e8fc0_driver = {
290
+
.probe = s6e8fc0_m1906f9_probe,
291
+
.remove = s6e8fc0_remove,
292
+
.driver = {
293
+
.name = "panel-samsung-s6e8fc0-m1906f9",
294
+
.of_match_table = samsung_s6e8fc0_of_match,
295
+
},
296
+
};
297
+
module_mipi_dsi_driver(s6e8fc0_driver);
298
+
299
+
MODULE_AUTHOR("Kamil Gołda <kamil.golda@protonmail.com>");
300
+
MODULE_DESCRIPTION("DRM driver for Samsung s6e8fc0 DSI controller");
301
+
MODULE_LICENSE("GPL");