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drm/panel: Add driver for JDI LPM102A188A
The JDI LPM102A188A is a 2560x1800 IPS panel found in the Google Pixel C. This driver is based on the downstream GPLv2 driver released by Google written by Sean Paul [1], which was then adapted to the newer kernel APIs. [1]: https://android.googlesource.com/kernel/tegra/+/refs/heads/android-tegra-dragon-3.18-oreo/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230807133307.27456-3-diogo.ivo@tecnico.ulisboa.pt
This commit is contained in:
Diogo Ivo
Neil Armstrong
parent
a913a739ab
commit
25205087df
@ -244,6 +244,17 @@ config DRM_PANEL_JDI_LT070ME05000
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The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses
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24 bit per pixel.
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config DRM_PANEL_JDI_LPM102A188A
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tristate "JDI LPM102A188A DSI panel"
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depends on OF && GPIOLIB
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depends on DRM_MIPI_DSI
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depends on BACKLIGHT_CLASS_DEVICE
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help
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Say Y here if you want to enable support for JDI LPM102A188A DSI
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command mode panel as found in Google Pixel C devices.
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The panel has a 2560×1800 resolution. It provides a MIPI DSI interface
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to the host.
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config DRM_PANEL_JDI_R63452
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tristate "JDI R63452 Full HD DSI panel"
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depends on OF
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@ -22,6 +22,7 @@ obj-$(CONFIG_DRM_PANEL_INNOLUX_EJ030NA) += panel-innolux-ej030na.o
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obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
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obj-$(CONFIG_DRM_PANEL_JADARD_JD9365DA_H3) += panel-jadard-jd9365da-h3.o
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obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
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obj-$(CONFIG_DRM_PANEL_JDI_LPM102A188A) += panel-jdi-lpm102a188a.o
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obj-$(CONFIG_DRM_PANEL_JDI_R63452) += panel-jdi-fhd-r63452.o
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obj-$(CONFIG_DRM_PANEL_KHADAS_TS050) += panel-khadas-ts050.o
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obj-$(CONFIG_DRM_PANEL_KINGDISPLAY_KD097D04) += panel-kingdisplay-kd097d04.o
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551
drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c
Normal file
551
drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c
Normal file
@ -0,0 +1,551 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2014 Google, Inc.
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*
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* Copyright (C) 2022 Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
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*
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* Adapted from the downstream Pixel C driver written by Sean Paul
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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/module.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <video/mipi_display.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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#define MCS_CMD_ACS_PROT 0xB0
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#define MCS_CMD_ACS_PROT_OFF (0 << 0)
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#define MCS_PWR_CTRL_FUNC 0xD0
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#define MCS_PWR_CTRL_PARAM1_DEFAULT (2 << 0)
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#define MCS_PWR_CTRL_PARAM1_VGH_210_DIV (1 << 4)
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#define MCS_PWR_CTRL_PARAM1_VGH_240_DIV (2 << 4)
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#define MCS_PWR_CTRL_PARAM1_VGH_280_DIV (3 << 4)
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#define MCS_PWR_CTRL_PARAM1_VGH_330_DIV (4 << 4)
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#define MCS_PWR_CTRL_PARAM1_VGH_410_DIV (5 << 4)
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#define MCS_PWR_CTRL_PARAM2_DEFAULT (9 << 4)
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#define MCS_PWR_CTRL_PARAM2_VGL_210_DIV (1 << 0)
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#define MCS_PWR_CTRL_PARAM2_VGL_240_DIV (2 << 0)
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#define MCS_PWR_CTRL_PARAM2_VGL_280_DIV (3 << 0)
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#define MCS_PWR_CTRL_PARAM2_VGL_330_DIV (4 << 0)
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#define MCS_PWR_CTRL_PARAM2_VGL_410_DIV (5 << 0)
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struct jdi_panel {
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struct drm_panel base;
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struct mipi_dsi_device *link1;
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struct mipi_dsi_device *link2;
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struct regulator *supply;
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struct regulator *ddi_supply;
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struct backlight_device *backlight;
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struct gpio_desc *enable_gpio;
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struct gpio_desc *reset_gpio;
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const struct drm_display_mode *mode;
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};
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static inline struct jdi_panel *to_panel_jdi(struct drm_panel *panel)
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{
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return container_of(panel, struct jdi_panel, base);
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}
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static void jdi_wait_frames(struct jdi_panel *jdi, unsigned int frames)
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{
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unsigned int refresh = drm_mode_vrefresh(jdi->mode);
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if (WARN_ON(frames > refresh))
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return;
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msleep(1000 / (refresh / frames));
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}
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static int jdi_panel_disable(struct drm_panel *panel)
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{
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struct jdi_panel *jdi = to_panel_jdi(panel);
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backlight_disable(jdi->backlight);
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jdi_wait_frames(jdi, 2);
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return 0;
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}
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static int jdi_panel_unprepare(struct drm_panel *panel)
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{
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struct jdi_panel *jdi = to_panel_jdi(panel);
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int ret;
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ret = mipi_dsi_dcs_set_display_off(jdi->link1);
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if (ret < 0)
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dev_err(panel->dev, "failed to set display off: %d\n", ret);
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ret = mipi_dsi_dcs_set_display_off(jdi->link2);
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if (ret < 0)
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dev_err(panel->dev, "failed to set display off: %d\n", ret);
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/* Specified by JDI @ 50ms, subject to change */
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msleep(50);
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ret = mipi_dsi_dcs_enter_sleep_mode(jdi->link1);
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if (ret < 0)
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dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
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ret = mipi_dsi_dcs_enter_sleep_mode(jdi->link2);
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if (ret < 0)
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dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
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/* Specified by JDI @ 150ms, subject to change */
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msleep(150);
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gpiod_set_value(jdi->reset_gpio, 1);
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/* T4 = 1ms */
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usleep_range(1000, 3000);
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gpiod_set_value(jdi->enable_gpio, 0);
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/* T5 = 2ms */
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usleep_range(2000, 4000);
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regulator_disable(jdi->ddi_supply);
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/* T6 = 2ms plus some time to discharge capacitors */
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usleep_range(7000, 9000);
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regulator_disable(jdi->supply);
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/* Specified by JDI @ 20ms, subject to change */
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msleep(20);
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return ret;
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}
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static int jdi_setup_symmetrical_split(struct mipi_dsi_device *left,
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struct mipi_dsi_device *right,
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const struct drm_display_mode *mode)
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{
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int err;
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err = mipi_dsi_dcs_set_column_address(left, 0, mode->hdisplay / 2 - 1);
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if (err < 0) {
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dev_err(&left->dev, "failed to set column address: %d\n", err);
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return err;
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}
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err = mipi_dsi_dcs_set_column_address(right, 0, mode->hdisplay / 2 - 1);
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if (err < 0) {
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dev_err(&right->dev, "failed to set column address: %d\n", err);
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return err;
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}
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err = mipi_dsi_dcs_set_page_address(left, 0, mode->vdisplay - 1);
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if (err < 0) {
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dev_err(&left->dev, "failed to set page address: %d\n", err);
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return err;
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}
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err = mipi_dsi_dcs_set_page_address(right, 0, mode->vdisplay - 1);
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if (err < 0) {
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dev_err(&right->dev, "failed to set page address: %d\n", err);
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return err;
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}
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return 0;
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}
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static int jdi_write_dcdc_registers(struct jdi_panel *jdi)
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{
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/* Clear the manufacturer command access protection */
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mipi_dsi_generic_write_seq(jdi->link1, MCS_CMD_ACS_PROT,
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MCS_CMD_ACS_PROT_OFF);
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mipi_dsi_generic_write_seq(jdi->link2, MCS_CMD_ACS_PROT,
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MCS_CMD_ACS_PROT_OFF);
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/*
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* Change the VGH/VGL divide rations to move the noise generated by the
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* TCONN. This should hopefully avoid interaction with the backlight
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* controller.
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*/
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mipi_dsi_generic_write_seq(jdi->link1, MCS_PWR_CTRL_FUNC,
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MCS_PWR_CTRL_PARAM1_VGH_330_DIV |
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MCS_PWR_CTRL_PARAM1_DEFAULT,
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MCS_PWR_CTRL_PARAM2_VGL_410_DIV |
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MCS_PWR_CTRL_PARAM2_DEFAULT);
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mipi_dsi_generic_write_seq(jdi->link2, MCS_PWR_CTRL_FUNC,
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MCS_PWR_CTRL_PARAM1_VGH_330_DIV |
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MCS_PWR_CTRL_PARAM1_DEFAULT,
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MCS_PWR_CTRL_PARAM2_VGL_410_DIV |
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MCS_PWR_CTRL_PARAM2_DEFAULT);
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return 0;
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}
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static int jdi_panel_prepare(struct drm_panel *panel)
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{
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struct jdi_panel *jdi = to_panel_jdi(panel);
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int err;
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/* Disable backlight to avoid showing random pixels
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* with a conservative delay for it to take effect.
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*/
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backlight_disable(jdi->backlight);
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jdi_wait_frames(jdi, 3);
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jdi->link1->mode_flags |= MIPI_DSI_MODE_LPM;
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jdi->link2->mode_flags |= MIPI_DSI_MODE_LPM;
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err = regulator_enable(jdi->supply);
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if (err < 0) {
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dev_err(panel->dev, "failed to enable supply: %d\n", err);
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return err;
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}
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/* T1 = 2ms */
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usleep_range(2000, 4000);
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err = regulator_enable(jdi->ddi_supply);
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if (err < 0) {
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dev_err(panel->dev, "failed to enable ddi_supply: %d\n", err);
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goto supply_off;
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}
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/* T2 = 1ms */
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usleep_range(1000, 3000);
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gpiod_set_value(jdi->enable_gpio, 1);
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/* T3 = 10ms */
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usleep_range(10000, 15000);
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gpiod_set_value(jdi->reset_gpio, 0);
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/* Specified by JDI @ 3ms, subject to change */
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usleep_range(3000, 5000);
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/*
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* TODO: The device supports both left-right and even-odd split
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* configurations, but this driver currently supports only the left-
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* right split. To support a different mode a mechanism needs to be
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* put in place to communicate the configuration back to the DSI host
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* controller.
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*/
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err = jdi_setup_symmetrical_split(jdi->link1, jdi->link2,
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jdi->mode);
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if (err < 0) {
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dev_err(panel->dev, "failed to set up symmetrical split: %d\n",
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err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_tear_scanline(jdi->link1,
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jdi->mode->vdisplay - 16);
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if (err < 0) {
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dev_err(panel->dev, "failed to set tear scanline: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_tear_scanline(jdi->link2,
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jdi->mode->vdisplay - 16);
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if (err < 0) {
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dev_err(panel->dev, "failed to set tear scanline: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_tear_on(jdi->link1,
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MIPI_DSI_DCS_TEAR_MODE_VBLANK);
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if (err < 0) {
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dev_err(panel->dev, "failed to set tear on: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_tear_on(jdi->link2,
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MIPI_DSI_DCS_TEAR_MODE_VBLANK);
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if (err < 0) {
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dev_err(panel->dev, "failed to set tear on: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_pixel_format(jdi->link1, MIPI_DCS_PIXEL_FMT_24BIT);
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if (err < 0) {
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dev_err(panel->dev, "failed to set pixel format: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_pixel_format(jdi->link2, MIPI_DCS_PIXEL_FMT_24BIT);
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if (err < 0) {
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dev_err(panel->dev, "failed to set pixel format: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_exit_sleep_mode(jdi->link1);
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if (err < 0) {
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dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_exit_sleep_mode(jdi->link2);
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if (err < 0) {
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dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
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goto poweroff;
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}
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err = jdi_write_dcdc_registers(jdi);
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if (err < 0) {
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dev_err(panel->dev, "failed to write dcdc registers: %d\n", err);
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goto poweroff;
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}
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/*
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* We need to wait 150ms between mipi_dsi_dcs_exit_sleep_mode() and
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* mipi_dsi_dcs_set_display_on().
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*/
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msleep(150);
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err = mipi_dsi_dcs_set_display_on(jdi->link1);
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if (err < 0) {
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dev_err(panel->dev, "failed to set display on: %d\n", err);
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goto poweroff;
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}
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err = mipi_dsi_dcs_set_display_on(jdi->link2);
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if (err < 0) {
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dev_err(panel->dev, "failed to set display on: %d\n", err);
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goto poweroff;
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}
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jdi->link1->mode_flags &= ~MIPI_DSI_MODE_LPM;
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jdi->link2->mode_flags &= ~MIPI_DSI_MODE_LPM;
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return 0;
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poweroff:
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regulator_disable(jdi->ddi_supply);
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/* T6 = 2ms plus some time to discharge capacitors */
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usleep_range(7000, 9000);
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supply_off:
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regulator_disable(jdi->supply);
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/* Specified by JDI @ 20ms, subject to change */
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msleep(20);
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return err;
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}
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static int jdi_panel_enable(struct drm_panel *panel)
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{
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struct jdi_panel *jdi = to_panel_jdi(panel);
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/*
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* Ensure we send image data before turning the backlight
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* on, to avoid the display showing random pixels.
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*/
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jdi_wait_frames(jdi, 3);
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backlight_enable(jdi->backlight);
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return 0;
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}
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static const struct drm_display_mode default_mode = {
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.clock = (2560 + 80 + 80 + 80) * (1800 + 4 + 4 + 4) * 60 / 1000,
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.hdisplay = 2560,
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.hsync_start = 2560 + 80,
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.hsync_end = 2560 + 80 + 80,
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.htotal = 2560 + 80 + 80 + 80,
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.vdisplay = 1800,
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.vsync_start = 1800 + 4,
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.vsync_end = 1800 + 4 + 4,
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.vtotal = 1800 + 4 + 4 + 4,
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.flags = 0,
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};
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static int jdi_panel_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct drm_display_mode *mode;
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struct jdi_panel *jdi = to_panel_jdi(panel);
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struct device *dev = &jdi->link1->dev;
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mode = drm_mode_duplicate(connector->dev, &default_mode);
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if (!mode) {
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dev_err(dev, "failed to add mode %ux%ux@%u\n",
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default_mode.hdisplay, default_mode.vdisplay,
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drm_mode_vrefresh(&default_mode));
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return -ENOMEM;
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}
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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connector->display_info.width_mm = 211;
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connector->display_info.height_mm = 148;
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connector->display_info.bpc = 8;
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return 1;
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}
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static const struct drm_panel_funcs jdi_panel_funcs = {
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.prepare = jdi_panel_prepare,
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.enable = jdi_panel_enable,
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.disable = jdi_panel_disable,
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.unprepare = jdi_panel_unprepare,
|
||||
.get_modes = jdi_panel_get_modes,
|
||||
};
|
||||
|
||||
static const struct of_device_id jdi_of_match[] = {
|
||||
{ .compatible = "jdi,lpm102a188a", },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, jdi_of_match);
|
||||
|
||||
static int jdi_panel_add(struct jdi_panel *jdi)
|
||||
{
|
||||
struct device *dev = &jdi->link1->dev;
|
||||
|
||||
jdi->mode = &default_mode;
|
||||
|
||||
jdi->supply = devm_regulator_get(dev, "power");
|
||||
if (IS_ERR(jdi->supply))
|
||||
return dev_err_probe(dev, PTR_ERR(jdi->supply),
|
||||
"failed to get power regulator\n");
|
||||
|
||||
jdi->ddi_supply = devm_regulator_get(dev, "ddi");
|
||||
if (IS_ERR(jdi->ddi_supply))
|
||||
return dev_err_probe(dev, PTR_ERR(jdi->ddi_supply),
|
||||
"failed to get ddi regulator\n");
|
||||
|
||||
jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(jdi->reset_gpio))
|
||||
return dev_err_probe(dev, PTR_ERR(jdi->reset_gpio),
|
||||
"failed to get reset gpio\n");
|
||||
/* T4 = 1ms */
|
||||
usleep_range(1000, 3000);
|
||||
|
||||
jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(jdi->enable_gpio))
|
||||
return dev_err_probe(dev, PTR_ERR(jdi->enable_gpio),
|
||||
"failed to get enable gpio\n");
|
||||
/* T5 = 2ms */
|
||||
usleep_range(2000, 4000);
|
||||
|
||||
jdi->backlight = devm_of_find_backlight(dev);
|
||||
if (IS_ERR(jdi->backlight))
|
||||
return dev_err_probe(dev, PTR_ERR(jdi->backlight),
|
||||
"failed to create backlight\n");
|
||||
|
||||
drm_panel_init(&jdi->base, &jdi->link1->dev, &jdi_panel_funcs,
|
||||
DRM_MODE_CONNECTOR_DSI);
|
||||
|
||||
drm_panel_add(&jdi->base);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void jdi_panel_del(struct jdi_panel *jdi)
|
||||
{
|
||||
if (jdi->base.dev)
|
||||
drm_panel_remove(&jdi->base);
|
||||
|
||||
if (jdi->link2)
|
||||
put_device(&jdi->link2->dev);
|
||||
}
|
||||
|
||||
static int jdi_panel_dsi_probe(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct mipi_dsi_device *secondary = NULL;
|
||||
struct jdi_panel *jdi;
|
||||
struct device_node *np;
|
||||
int err;
|
||||
|
||||
dsi->lanes = 4;
|
||||
dsi->format = MIPI_DSI_FMT_RGB888;
|
||||
dsi->mode_flags = 0;
|
||||
|
||||
/* Find DSI-LINK1 */
|
||||
np = of_parse_phandle(dsi->dev.of_node, "link2", 0);
|
||||
if (np) {
|
||||
secondary = of_find_mipi_dsi_device_by_node(np);
|
||||
of_node_put(np);
|
||||
|
||||
if (!secondary)
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
|
||||
/* register a panel for only the DSI-LINK1 interface */
|
||||
if (secondary) {
|
||||
jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
|
||||
if (!jdi) {
|
||||
put_device(&secondary->dev);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
mipi_dsi_set_drvdata(dsi, jdi);
|
||||
|
||||
jdi->link1 = dsi;
|
||||
jdi->link2 = secondary;
|
||||
|
||||
err = jdi_panel_add(jdi);
|
||||
if (err < 0) {
|
||||
put_device(&secondary->dev);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
err = mipi_dsi_attach(dsi);
|
||||
if (err < 0) {
|
||||
if (secondary)
|
||||
jdi_panel_del(jdi);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void jdi_panel_dsi_remove(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
|
||||
int err;
|
||||
|
||||
/* only detach from host for the DSI-LINK2 interface */
|
||||
if (!jdi)
|
||||
mipi_dsi_detach(dsi);
|
||||
|
||||
err = jdi_panel_disable(&jdi->base);
|
||||
if (err < 0)
|
||||
dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
|
||||
|
||||
err = mipi_dsi_detach(dsi);
|
||||
if (err < 0)
|
||||
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
|
||||
|
||||
jdi_panel_del(jdi);
|
||||
}
|
||||
|
||||
static void jdi_panel_dsi_shutdown(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
|
||||
|
||||
if (!jdi)
|
||||
return;
|
||||
|
||||
jdi_panel_disable(&jdi->base);
|
||||
}
|
||||
|
||||
static struct mipi_dsi_driver jdi_panel_dsi_driver = {
|
||||
.driver = {
|
||||
.name = "panel-jdi-lpm102a188a",
|
||||
.of_match_table = jdi_of_match,
|
||||
},
|
||||
.probe = jdi_panel_dsi_probe,
|
||||
.remove = jdi_panel_dsi_remove,
|
||||
.shutdown = jdi_panel_dsi_shutdown,
|
||||
};
|
||||
module_mipi_dsi_driver(jdi_panel_dsi_driver);
|
||||
|
||||
MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
|
||||
MODULE_AUTHOR("Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>");
|
||||
MODULE_DESCRIPTION("DRM Driver for JDI LPM102A188A DSI panel, command mode");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user