Message-ID: <8ab061aa-a2fa-3070-a756-5682eb40a425@linaro.org>
Date:   Thu, 16 Feb 2023 13:47:40 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Daniel Vetter <daniel@...ll.ch>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org,
        marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] gpu/drm/panel: Add Sony TD4353 JDI panel driver

On 16/02/2023 13:32, Daniel Vetter wrote:
> On Thu, 16 Feb 2023 at 12:59, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>>
>>
>>
>> On 19.01.2023 17:32, Konrad Dybcio wrote:
>>> From: Konrad Dybcio <konrad.dybcio@...ainline.org>
>>>
>>> Add support for the Sony TD4353 JDI 2160x1080 display panel used in
>>> some Sony Xperia XZ2 and XZ2 Compact smartphones. Due to the specifics
>>> of smartphone manufacturing, it is impossible to retrieve a better name
>>> for this panel.
>>>
>>> This revision adds support for the default 60 Hz configuration, however
>>> there could possibly be some room for expansion, as the display panels
>>> used on Sony devices have historically been capable of >2x refresh rate
>>> overclocking.
>>>
>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>> Reviewed-by: Marijn Suijten <marijn.suijten@...ainline.org>
>>> ---
>> Are there any outstanding issues with this driver, or perhaps I did
>> not CC some important list? It has gotten very little activity ever
>> since its initial submission around Sept'22..
> 
> Sam is usually picking up panel drivers these days, but maybe we need
> a bit more help in this area? If anyone from linaro has a handful of
> drm patches landed in upstream they could apply for drm-misc commit
> rights and help push these. I think linaro has lost a few of the
> drm-misc committers so things tend to be stuck a bit more :-/

I usually wait for Sam to comment before applying my panel patches drivers to drm-misc-next,
but yeah panels would need some more help...

If needed I can add myself to the panel drivers maintainance aswell.

Neil

> -Daniel
> 
>>
>> Konrad
>>> v3 -> v4:
>>> - De-magicize some numbers
>>> - Pick up rb
>>>   drivers/gpu/drm/panel/Kconfig                 |  10 +
>>>   drivers/gpu/drm/panel/Makefile                |   1 +
>>>   drivers/gpu/drm/panel/panel-sony-td4353-jdi.c | 329 ++++++++++++++++++
>>>   3 files changed, 340 insertions(+)
>>>   create mode 100644 drivers/gpu/drm/panel/panel-sony-td4353-jdi.c
>>>
>>> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
>>> index d03a64155d15..8da741f1c2ba 100644
>>> --- a/drivers/gpu/drm/panel/Kconfig
>>> +++ b/drivers/gpu/drm/panel/Kconfig
>>> @@ -677,6 +677,16 @@ config DRM_PANEL_SONY_ACX565AKM
>>>          Say Y here if you want to enable support for the Sony ACX565AKM
>>>          800x600 3.5" panel (found on the Nokia N900).
>>>
>>> +config DRM_PANEL_SONY_TD4353_JDI
>>> +     tristate "Sony TD4353 JDI panel"
>>> +     depends on GPIOLIB && OF
>>> +     depends on DRM_MIPI_DSI
>>> +     depends on BACKLIGHT_CLASS_DEVICE
>>> +     help
>>> +       Say Y here if you want to enable support for the Sony Tama
>>> +       TD4353 JDI command mode panel as found on some Sony Xperia
>>> +       XZ2 and XZ2 Compact smartphones.
>>> +
>>>   config DRM_PANEL_SONY_TULIP_TRULY_NT35521
>>>        tristate "Sony Tulip Truly NT35521 panel"
>>>        depends on GPIOLIB && OF
>>> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
>>> index 1630dd0c69ae..22155d62bec0 100644
>>> --- a/drivers/gpu/drm/panel/Makefile
>>> +++ b/drivers/gpu/drm/panel/Makefile
>>> @@ -68,6 +68,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
>>>   obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
>>>   obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
>>>   obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
>>> +obj-$(CONFIG_DRM_PANEL_SONY_TD4353_JDI) += panel-sony-td4353-jdi.o
>>>   obj-$(CONFIG_DRM_PANEL_SONY_TULIP_TRULY_NT35521) += panel-sony-tulip-truly-nt35521.o
>>>   obj-$(CONFIG_DRM_PANEL_SONY_SYNAPTICS_JDI) += panel-sony-synaptics-jdi.o
>>>   obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
>>> diff --git a/drivers/gpu/drm/panel/panel-sony-td4353-jdi.c b/drivers/gpu/drm/panel/panel-sony-td4353-jdi.c
>>> new file mode 100644
>>> index 000000000000..8d8813dbaa45
>>> --- /dev/null
>>> +++ b/drivers/gpu/drm/panel/panel-sony-td4353-jdi.c
>>> @@ -0,0 +1,329 @@
>>> +// SPDX-License-Identifier: GPL-2.0-only
>>> +/*
>>> + * Copyright (c) 2022 Konrad Dybcio <konrad.dybcio@...ainline.org>
>>> + *
>>> + * Generated with linux-mdss-dsi-panel-driver-generator with a
>>> + * substantial amount of manual adjustments.
>>> + *
>>> + * SONY Downstream kernel calls this one:
>>> + * - "JDI ID3" for Akari  (XZ2)
>>> + * - "JDI ID4" for Apollo (XZ2 Compact)
>>> + */
>>> +
>>> +#include <linux/delay.h>
>>> +#include <linux/gpio/consumer.h>
>>> +#include <linux/module.h>
>>> +#include <linux/of.h>
>>> +#include <linux/of_device.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>
>>> +
>>> +enum {
>>> +     TYPE_TAMA_60HZ,
>>> +     /*
>>> +      * Leaving room for expansion - SONY very often uses
>>> +      * *truly reliably* overclockable panels on their flagships!
>>> +      */
>>> +};
>>> +
>>> +struct sony_td4353_jdi {
>>> +     struct drm_panel panel;
>>> +     struct mipi_dsi_device *dsi;
>>> +     struct regulator_bulk_data supplies[3];
>>> +     struct gpio_desc *panel_reset_gpio;
>>> +     struct gpio_desc *touch_reset_gpio;
>>> +     bool prepared;
>>> +     int type;
>>> +};
>>> +
>>> +static inline struct sony_td4353_jdi *to_sony_td4353_jdi(struct drm_panel *panel)
>>> +{
>>> +     return container_of(panel, struct sony_td4353_jdi, panel);
>>> +}
>>> +
>>> +static int sony_td4353_jdi_on(struct sony_td4353_jdi *ctx)
>>> +{
>>> +     struct mipi_dsi_device *dsi = ctx->dsi;
>>> +     struct device *dev = &dsi->dev;
>>> +     int ret;
>>> +
>>> +     dsi->mode_flags |= MIPI_DSI_MODE_LPM;
>>> +
>>> +     ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 1080 - 1);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set column address: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 2160 - 1);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set page address: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set tear scanline: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set tear on: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
>>> +
>>> +     ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set pixel format: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_PARTIAL_ROWS,
>>> +                       0x00, 0x00, 0x08, 0x6f);
>>> +
>>> +     ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +     msleep(70);
>>> +
>>> +     mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_MEMORY_START);
>>> +
>>> +     ret = mipi_dsi_dcs_set_display_on(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to turn display on: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     return 0;
>>> +}
>>> +
>>> +static int sony_td4353_jdi_off(struct sony_td4353_jdi *ctx)
>>> +{
>>> +     struct mipi_dsi_device *dsi = ctx->dsi;
>>> +     struct device *dev = &dsi->dev;
>>> +     int ret;
>>> +
>>> +     dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
>>> +
>>> +     ret = mipi_dsi_dcs_set_display_off(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set display off: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +     msleep(22);
>>> +
>>> +     ret = mipi_dsi_dcs_set_tear_off(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to set tear off: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +     msleep(80);
>>> +
>>> +     return 0;
>>> +}
>>> +
>>> +static void sony_td4353_assert_reset_gpios(struct sony_td4353_jdi *ctx, int mode)
>>> +{
>>> +     gpiod_set_value_cansleep(ctx->touch_reset_gpio, mode);
>>> +     gpiod_set_value_cansleep(ctx->panel_reset_gpio, mode);
>>> +     usleep_range(5000, 5100);
>>> +}
>>> +
>>> +static int sony_td4353_jdi_prepare(struct drm_panel *panel)
>>> +{
>>> +     struct sony_td4353_jdi *ctx = to_sony_td4353_jdi(panel);
>>> +     struct device *dev = &ctx->dsi->dev;
>>> +     int ret;
>>> +
>>> +     if (ctx->prepared)
>>> +             return 0;
>>> +
>>> +     ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to enable regulators: %d\n", ret);
>>> +             return ret;
>>> +     }
>>> +
>>> +     msleep(100);
>>> +
>>> +     sony_td4353_assert_reset_gpios(ctx, 1);
>>> +
>>> +     ret = sony_td4353_jdi_on(ctx);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to power on panel: %d\n", ret);
>>> +             sony_td4353_assert_reset_gpios(ctx, 0);
>>> +             regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
>>> +             return ret;
>>> +     }
>>> +
>>> +     ctx->prepared = true;
>>> +     return 0;
>>> +}
>>> +
>>> +static int sony_td4353_jdi_unprepare(struct drm_panel *panel)
>>> +{
>>> +     struct sony_td4353_jdi *ctx = to_sony_td4353_jdi(panel);
>>> +     struct device *dev = &ctx->dsi->dev;
>>> +     int ret;
>>> +
>>> +     if (!ctx->prepared)
>>> +             return 0;
>>> +
>>> +     ret = sony_td4353_jdi_off(ctx);
>>> +     if (ret < 0)
>>> +             dev_err(dev, "Failed to power off panel: %d\n", ret);
>>> +
>>> +     sony_td4353_assert_reset_gpios(ctx, 0);
>>> +     regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
>>> +
>>> +     ctx->prepared = false;
>>> +     return 0;
>>> +}
>>> +
>>> +static const struct drm_display_mode sony_td4353_jdi_mode_tama_60hz = {
>>> +     .clock = (1080 + 4 + 8 + 8) * (2160 + 259 + 8 + 8) * 60 / 1000,
>>> +     .hdisplay = 1080,
>>> +     .hsync_start = 1080 + 4,
>>> +     .hsync_end = 1080 + 4 + 8,
>>> +     .htotal = 1080 + 4 + 8 + 8,
>>> +     .vdisplay = 2160,
>>> +     .vsync_start = 2160 + 259,
>>> +     .vsync_end = 2160 + 259 + 8,
>>> +     .vtotal = 2160 + 259 + 8 + 8,
>>> +     .width_mm = 64,
>>> +     .height_mm = 128,
>>> +};
>>> +
>>> +static int sony_td4353_jdi_get_modes(struct drm_panel *panel,
>>> +                                struct drm_connector *connector)
>>> +{
>>> +     struct sony_td4353_jdi *ctx = to_sony_td4353_jdi(panel);
>>> +     struct drm_display_mode *mode = NULL;
>>> +
>>> +     if (ctx->type == TYPE_TAMA_60HZ)
>>> +             mode = drm_mode_duplicate(connector->dev, &sony_td4353_jdi_mode_tama_60hz);
>>> +     else
>>> +             return -EINVAL;
>>> +
>>> +     if (!mode)
>>> +             return -ENOMEM;
>>> +
>>> +     drm_mode_set_name(mode);
>>> +
>>> +     mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
>>> +     connector->display_info.width_mm = mode->width_mm;
>>> +     connector->display_info.height_mm = mode->height_mm;
>>> +     drm_mode_probed_add(connector, mode);
>>> +
>>> +     return 1;
>>> +}
>>> +
>>> +static const struct drm_panel_funcs sony_td4353_jdi_panel_funcs = {
>>> +     .prepare = sony_td4353_jdi_prepare,
>>> +     .unprepare = sony_td4353_jdi_unprepare,
>>> +     .get_modes = sony_td4353_jdi_get_modes,
>>> +};
>>> +
>>> +static int sony_td4353_jdi_probe(struct mipi_dsi_device *dsi)
>>> +{
>>> +     struct device *dev = &dsi->dev;
>>> +     struct sony_td4353_jdi *ctx;
>>> +     int ret;
>>> +
>>> +     ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
>>> +     if (!ctx)
>>> +             return -ENOMEM;
>>> +
>>> +     ctx->type = (uintptr_t)of_device_get_match_data(dev);
>>> +
>>> +     ctx->supplies[0].supply = "vddio";
>>> +     ctx->supplies[1].supply = "vsp";
>>> +     ctx->supplies[2].supply = "vsn";
>>> +     ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
>>> +                                   ctx->supplies);
>>> +     if (ret < 0)
>>> +             return dev_err_probe(dev, ret, "Failed to get regulators\n");
>>> +
>>> +     ctx->panel_reset_gpio = devm_gpiod_get(dev, "panel-reset", GPIOD_ASIS);
>>> +     if (IS_ERR(ctx->panel_reset_gpio))
>>> +             return dev_err_probe(dev, PTR_ERR(ctx->panel_reset_gpio),
>>> +                                  "Failed to get panel-reset-gpios\n");
>>> +
>>> +     ctx->touch_reset_gpio = devm_gpiod_get(dev, "touch-reset", GPIOD_ASIS);
>>> +     if (IS_ERR(ctx->touch_reset_gpio))
>>> +             return dev_err_probe(dev, PTR_ERR(ctx->touch_reset_gpio),
>>> +                                  "Failed to get touch-reset-gpios\n");
>>> +
>>> +     ctx->dsi = dsi;
>>> +     mipi_dsi_set_drvdata(dsi, ctx);
>>> +
>>> +     dsi->lanes = 4;
>>> +     dsi->format = MIPI_DSI_FMT_RGB888;
>>> +     dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
>>> +
>>> +     drm_panel_init(&ctx->panel, dev, &sony_td4353_jdi_panel_funcs,
>>> +                    DRM_MODE_CONNECTOR_DSI);
>>> +
>>> +     ret = drm_panel_of_backlight(&ctx->panel);
>>> +     if (ret)
>>> +             return dev_err_probe(dev, ret, "Failed to get backlight\n");
>>> +
>>> +     drm_panel_add(&ctx->panel);
>>> +
>>> +     ret = mipi_dsi_attach(dsi);
>>> +     if (ret < 0) {
>>> +             dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
>>> +             drm_panel_remove(&ctx->panel);
>>> +             return ret;
>>> +     }
>>> +
>>> +     return 0;
>>> +}
>>> +
>>> +static void sony_td4353_jdi_remove(struct mipi_dsi_device *dsi)
>>> +{
>>> +     struct sony_td4353_jdi *ctx = mipi_dsi_get_drvdata(dsi);
>>> +     int ret;
>>> +
>>> +     ret = mipi_dsi_detach(dsi);
>>> +     if (ret < 0)
>>> +             dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
>>> +
>>> +     drm_panel_remove(&ctx->panel);
>>> +}
>>> +
>>> +static const struct of_device_id sony_td4353_jdi_of_match[] = {
>>> +     { .compatible = "sony,td4353-jdi-tama", .data = (void *)TYPE_TAMA_60HZ },
>>> +     { /* sentinel */ }
>>> +};
>>> +MODULE_DEVICE_TABLE(of, sony_td4353_jdi_of_match);
>>> +
>>> +static struct mipi_dsi_driver sony_td4353_jdi_driver = {
>>> +     .probe = sony_td4353_jdi_probe,
>>> +     .remove = sony_td4353_jdi_remove,
>>> +     .driver = {
>>> +             .name = "panel-sony-td4353-jdi",
>>> +             .of_match_table = sony_td4353_jdi_of_match,
>>> +     },
>>> +};
>>> +module_mipi_dsi_driver(sony_td4353_jdi_driver);
>>> +
>>> +MODULE_AUTHOR("Konrad Dybcio <konrad.dybcio@...ainline.org>");
>>> +MODULE_DESCRIPTION("DRM panel driver for SONY Xperia XZ2/XZ2c JDI panel");
>>> +MODULE_LICENSE("GPL");
> 
> 
> 

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