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References: <20210120112158.62109-1-jagan@amarulasolutions.com> <20210120112158.62109-2-jagan@amarulasolutions.com>
In-Reply-To: <20210120112158.62109-2-jagan@amarulasolutions.com>
From:   Michael Nazzareno Trimarchi <michael@amarulasolutions.com>
Date:   Wed, 20 Jan 2021 12:25:15 +0100
Message-ID: <CAOf5uwnn0-89-hBDE3DTXACdTJG6u7jswAP9zfa=UiUeAz2ewA@mail.gmail.com>
Subject: Re: [PATCH 2/2] drm: bridge: Add SN65DSI84 DSI to LVDS bridge
To:     Jagan Teki <jagan@amarulasolutions.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Sam Ravnborg <sam@ravnborg.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        LKML <linux-kernel@vger.kernel.org>,
        devicetree <devicetree@vger.kernel.org>,
        linux-amarula <linux-amarula@amarulasolutions.com>,
        Matteo Lisi <matteo.lisi@engicam.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Jagan

On Wed, Jan 20, 2021 at 12:22 PM Jagan Teki <jagan@amarulasolutions.com> wrote:
>
> SN65DSI84 is a Single Channel DSI to Dual-link LVDS bridge from
> Texas Instruments.
>
> SN65DSI83, SN65DSI85 are variants of the same family of bridge
> controllers.
>
> Right now the bridge driver is supporting a single link, dual-link
> support requires to initiate I2C Channel B registers.
>
> Tested with STM32MP1 MIPI DSI host design configuration.
>
> Signed-off-by: Matteo Lisi <matteo.lisi@engicam.com>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
>  MAINTAINERS                           |   6 +
>  drivers/gpu/drm/bridge/Kconfig        |  19 +
>  drivers/gpu/drm/bridge/Makefile       |   1 +
>  drivers/gpu/drm/bridge/ti-sn65dsi84.c | 488 ++++++++++++++++++++++++++
>  4 files changed, 514 insertions(+)
>  create mode 100644 drivers/gpu/drm/bridge/ti-sn65dsi84.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 12dd1fff2a39..44750ff7640c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5984,6 +5984,12 @@ S:       Maintained
>  F:     Documentation/devicetree/bindings/display/ti/
>  F:     drivers/gpu/drm/omapdrm/
>
> +DRM DRIVERS FOR TI SN65DSI84 DSI TO LVDS BRIDGE
> +M:     Jagan Teki <jagan@amarulasolutions.com>
> +S:     Maintained
> +F:     Documentation/devicetree/bindings/display/bridge/ti,sn65dsi84.yaml
> +F:     drivers/gpu/drm/bridge/ti-sn65dsi84.c
> +
>  DRM DRIVERS FOR V3D
>  M:     Eric Anholt <eric@anholt.net>
>  S:     Supported
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index e4110d6ca7b3..6494881bffb3 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -232,6 +232,25 @@ config DRM_TI_TFP410
>         help
>           Texas Instruments TFP410 DVI/HDMI Transmitter driver
>
> +config DRM_TI_SN65DSI84
> +       tristate "TI SN65DSI84 DSI to LVDS bridge"
> +       depends on OF
> +       select DRM_KMS_HELPER
> +       select REGMAP_I2C
> +       select DRM_PANEL
> +       select DRM_MIPI_DSI
> +       help
> +         Texas Instruments SN65DSI84 Single Channel DSI to Dual-link LVDS
> +         bridge driver.
> +
> +         Bridge decodes MIPI DSI 18bpp RGB666 and 240bpp RG888 packets and
> +         converts the formatted video data stream to a FlatLink compatible
> +         LVDS output operating at pixel clocks operating from 25 MHx to
> +         154 MHz.
> +
> +         SN65DSI84 offers a Dual-Link LVDS, Single-Link LVDS interface with
> +         four data lanes per link.
> +
>  config DRM_TI_SN65DSI86
>         tristate "TI SN65DSI86 DSI to eDP bridge"
>         depends on OF
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index 86e7acc76f8d..3906052ef639 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
>  obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
>  obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
>  obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
> +obj-$(CONFIG_DRM_TI_SN65DSI84) += ti-sn65dsi84.o
>  obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
>  obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
>  obj-$(CONFIG_DRM_TI_TPD12S015) += ti-tpd12s015.o
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi84.c b/drivers/gpu/drm/bridge/ti-sn65dsi84.c
> new file mode 100644
> index 000000000000..3ed1f9a7d898
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi84.c
> @@ -0,0 +1,488 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2021 Engicam srl
> + * Copyright (C) 2021 Amarula Solutions(India)
> + * Author: Jagan Teki <jagan@amarulasolutions.com>
> + */
> +
> +#include <drm/drm_of.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_mipi_dsi.h>
> +
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +
> +/* sn65dsi84 registers */
> +#define SN65DSI_SOFT_RESET             0x09
> +#define SN65DSI_LVDS_CLK               0x0a
> +#define SN65DSI_CLK_DIV                        0x0b
> +#define SN65DSI_CLK_PLL                        0x0d
> +#define SN65DSI_DSI_CFG                        0x10
> +#define SN65DSI_DSI_CLK_EQ             0x11
> +#define SN65DSI_DSI_CLK_RANGE          0x12
> +#define SN65DSI_LVDS_MODE              0x18
> +#define SN65DSI_CHA_LINE_LO            0x20
> +#define SN65DSI_CHA_LINE_HI            0x21
> +#define SN65DSI_CHA_VIRT_LO            0x24
> +#define SN65DSI_CHA_VIRT_HI            0x25
> +#define SN65DSI_CHA_SYNC_DELAY_LO      0x28
> +#define SN65DSI_CHA_SYNC_DELAY_HI      0x29
> +#define SN65DSI_CHA_HSYNC_WIDTH_LO     0x2c
> +#define SN65DSI_CHA_HSYNC_WIDTH_HI     0x2d
> +#define SN65DSI_CHA_VSYNC_WIDTH_LO     0x30
> +#define SN65DSI_CHA_VSYNC_WIDTH_HI     0x31
> +#define SN65DSI_CHA_HBACK_PORCH                0x34
> +#define SN65DSI_CHA_VBACK_PORCH                0x36
> +#define SN65DSI_CHA_HFRONT_PORCH       0x38
> +#define SN65DSI_CHA_VFRONT_PORCH       0x3a
> +#define SN65DSI_CHA_ERR                        0xe5
> +
> +/* sn65dsi register bits */
> +#define SN65DSI_RESET_EN               BIT(0)
> +#define SN65DSI_PLL_EN                 BIT(0)
> +#define SN65DSI_LVDS_CLK_MASK          GENMASK(3, 1)
> +#define SN65DSI_LVDS_CLK_SHIFT         1
> +#define SN65DSI_LVDS_CLK_SRC_DSI       BIT(0)
> +#define SN65DSI_CLK_DIV_MASK           GENMASK(7, 3)
> +#define SN65DSI_CLK_DIV_SHIFT          3
> +#define SN65DSI_DSI_LANE_MASK          GENMASK(4, 3)
> +#define SN65DSI_DSI_LANE_SHIFT         3
> +#define SN65DSI_LVDS_LINK_CFG          BIT(4)
> +#define SN65DSI_LVDS_CHA_24BPP         BIT(3)
> +#define SN65DSI_CHA_LOW_SYNC_DELAY     0x20
> +#define SN65DSI_CHA_HIGH_SYNC_DELAY    0x00
> +
> +struct sn65dsi {
> +       struct device                   *dev;
> +       struct drm_bridge               bridge;
> +       struct drm_bridge               *panel_bridge;
> +
> +       struct device_node              *host_node;
> +       struct mipi_dsi_device          *dsi;
> +       u8                              dsi_lanes;
> +
> +       struct regmap                   *regmap;
> +       struct gpio_desc                *enable;
> +};
> +
> +static const struct regmap_config sn65dsi_regmap_config = {
> +       .reg_bits = 8,
> +       .val_bits = 8,
> +       .max_register = SN65DSI_CHA_ERR,
> +       .name = "sn65dsi",
> +       .cache_type = REGCACHE_RBTREE,
> +};
> +
> +static inline struct sn65dsi *bridge_to_sn65dsi(struct drm_bridge *bridge)
> +{
> +       return container_of(bridge, struct sn65dsi, bridge);
> +}
> +
> +static struct drm_display_mode *bridge_to_mode(struct drm_bridge *bridge)
> +{
> +       return &bridge->encoder->crtc->state->mode;
> +}
> +
> +static void sn65dsi_setup_channels(struct sn65dsi *sn,
> +                                  struct drm_display_mode *mode)
> +{
> +       u32 hsync_len, hfront_porch, hback_porch;
> +       u32 vsync_len, vfront_porch, vback_porch;
> +
> +       hfront_porch = mode->hsync_start - mode->hdisplay;
> +       hsync_len = mode->hsync_end - mode->hsync_start;
> +       hback_porch = mode->htotal - mode->hsync_end;
> +
> +       vfront_porch = mode->vsync_start - mode->vdisplay;
> +       vsync_len = mode->vsync_end - mode->vsync_start;
> +       vback_porch = mode->vtotal - mode->vsync_end;
> +
> +       /* cha, lower 8-bits of hdisplay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_LINE_LO, mode->hdisplay & 0xff);
> +
> +       msleep(10);
> +

I don't find any reason for those msleep. I don't have on my setup
with the same bridge

> +       /* cha, upper 4-bits of hdisplay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_LINE_HI, (mode->hdisplay >> 8) & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, lower 8-bits of vdisplay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VIRT_LO, mode->vdisplay & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, upper 4-bits of vdisplay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VIRT_HI, (mode->vdisplay >> 8) & 0xff);
> +
> +       msleep(10);
> +
> +       /*cha, lower sync delay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_SYNC_DELAY_LO, SN65DSI_CHA_LOW_SYNC_DELAY);
> +
> +       msleep(10);
> +
> +       /*cha, upper sync delay */
> +       regmap_write(sn->regmap, SN65DSI_CHA_SYNC_DELAY_HI, SN65DSI_CHA_HIGH_SYNC_DELAY);
> +
> +       msleep(10);
> +
> +       /* cha, lower 8-bits of hsync_len */
> +       regmap_write(sn->regmap, SN65DSI_CHA_HSYNC_WIDTH_LO, hsync_len & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, upper 2-bits of hsync_len */
> +       regmap_write(sn->regmap, SN65DSI_CHA_HSYNC_WIDTH_HI, (hsync_len >> 8) & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, lower 8-bits of vsync_len */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VSYNC_WIDTH_LO, vsync_len & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, upper 2-bits of vsync_len */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VSYNC_WIDTH_HI, (vsync_len >> 8) & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, hback_porch */
> +       regmap_write(sn->regmap, SN65DSI_CHA_HBACK_PORCH, hback_porch & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, vback_porch */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VBACK_PORCH, vback_porch & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, hfront_porch */
> +       regmap_write(sn->regmap, SN65DSI_CHA_HFRONT_PORCH, hfront_porch & 0xff);
> +
> +       msleep(10);
> +
> +       /* cha, vfront_porch */
> +       regmap_write(sn->regmap, SN65DSI_CHA_VFRONT_PORCH, vfront_porch & 0xff);
> +
> +       msleep(10);
> +}
> +
> +static int sn65dsi_get_clk_range(int min, int max, unsigned long clock,
> +                                unsigned long start, unsigned long diff)
> +{
> +       unsigned long next;
> +       int i;
> +
> +       for (i = min; i <= max; i++) {
> +               next = start + diff;
> +               if (start <= clock && clock < next)
> +                       return i;
> +
> +               start += diff;
> +       }
> +
> +       return -EINVAL;
> +}
> +
> +static void sn65dsi_enable(struct drm_bridge *bridge)
> +{
> +       struct sn65dsi *sn = bridge_to_sn65dsi(bridge);
> +       struct drm_display_mode *mode = bridge_to_mode(bridge);
> +       int bpp = mipi_dsi_pixel_format_to_bpp(sn->dsi->format);
> +       unsigned int lanes = sn->dsi->lanes;
> +       unsigned int pixel_clk = mode->clock * 1000;
> +       unsigned int dsi_clk = pixel_clk * bpp / (lanes * 2);
> +       unsigned int val;
> +
> +       /* set SOFT_RESET bit */
> +       regmap_write(sn->regmap, SN65DSI_SOFT_RESET, SN65DSI_RESET_EN);
> +
> +       msleep(10);
> +
> +       /* set PLL_EN bit */
> +       regmap_write(sn->regmap, SN65DSI_CLK_PLL, 0x0);
> +
> +       msleep(10);
> +
> +       /* setup lvds clock */
> +       val = sn65dsi_get_clk_range(0, 5, pixel_clk, 25000000, 25000000);
> +       if (val < 0) {
> +               DRM_DEV_ERROR(sn->dev, "invalid LVDS clock range %d\n", val);
> +               return;
> +       }
> +
> +       regmap_update_bits(sn->regmap, SN65DSI_LVDS_CLK,
> +                          SN65DSI_LVDS_CLK_MASK,
> +                          val << SN65DSI_LVDS_CLK_SHIFT);
> +
> +       regmap_update_bits(sn->regmap, SN65DSI_LVDS_CLK,
> +                          SN65DSI_LVDS_CLK_SRC_DSI,
> +                          SN65DSI_LVDS_CLK_SRC_DSI);
> +
> +       msleep(10);
> +
> +       /* setup bridge clock divider */
> +       val = (dsi_clk / pixel_clk) - 1;
> +       regmap_update_bits(sn->regmap, SN65DSI_CLK_DIV,
> +                          SN65DSI_CLK_DIV_MASK,
> +                          val << SN65DSI_CLK_DIV_SHIFT);
> +       msleep(10);
> +
> +       /* configure dsi */
> +       regmap_update_bits(sn->regmap, SN65DSI_DSI_CFG,
> +                          SN65DSI_DSI_LANE_MASK,
> +                          lanes << SN65DSI_DSI_LANE_SHIFT);
> +       msleep(10);
> +

Most of those, look like. I don't know why it does not work without.
Where is mention in datasheet?

> +       /* dsi clock range */
> +       val = sn65dsi_get_clk_range(8, 100, dsi_clk, 40000000, 5000000);
> +       if (val < 0) {
> +               DRM_DEV_ERROR(sn->dev, "invalid DSI clock range %d\n", val);
> +               return;
> +       }
> +
> +       regmap_write(sn->regmap, SN65DSI_DSI_CLK_RANGE, val);
> +
> +       msleep(10);
> +
> +       /* setup lvds channels */
> +       regmap_read(sn->regmap, SN65DSI_LVDS_MODE, &val);
> +       if (bpp == 24)
> +               val |= SN65DSI_LVDS_CHA_24BPP;
> +       regmap_write(sn->regmap, SN65DSI_LVDS_MODE, val);
> +
> +       msleep(10);
> +
> +       /* TODO Channel B required to set up for dual-link LVDS */
> +       sn65dsi_setup_channels(sn, mode);
> +

If you are supporting 84 this code can be drop.

> +       /* set PLL_EN bit */
> +       regmap_write(sn->regmap, SN65DSI_CLK_PLL, SN65DSI_PLL_EN);
> +
> +       msleep(10);
> +}
> +
> +static void sn65dsi_disable(struct drm_bridge *bridge)
> +{
> +       struct sn65dsi *sn = bridge_to_sn65dsi(bridge);
> +
> +       /* set PLL_EN bit */
> +       regmap_write(sn->regmap, SN65DSI_CLK_PLL, 0x0);
> +
> +       msleep(10);
> +
> +       /* set SOFT_RESET bit */
> +       regmap_write(sn->regmap, SN65DSI_SOFT_RESET, 0x0);
> +
> +       msleep(10);
> +}
> +
> +static void sn65dsi_post_disable(struct drm_bridge *bridge)
> +{
> +       struct sn65dsi *sn = bridge_to_sn65dsi(bridge);
> +
> +       gpiod_set_value_cansleep(sn->enable, 1);
> +
> +       msleep(10);
> +
> +       gpiod_set_value_cansleep(sn->enable, 0);
> +
> +       msleep(10);
> +}
> +
> +static void sn65dsi_pre_enable(struct drm_bridge *bridge)
> +{
> +       struct sn65dsi *sn = bridge_to_sn65dsi(bridge);
> +
> +       gpiod_set_value_cansleep(sn->enable, 0);
> +
> +       msleep(10);
> +
> +       gpiod_set_value_cansleep(sn->enable, 1);
> +
> +       msleep(10);
> +}
> +
> +static int sn65dsi_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags)
> +{
> +       struct sn65dsi *sn = bridge_to_sn65dsi(bridge);
> +       struct mipi_dsi_host *host;
> +       struct mipi_dsi_device *dsi;
> +       const struct mipi_dsi_device_info info = { .type = "sn65dsi",
> +                                                  .channel = 0,
> +                                                  .node = NULL,
> +                                                };
> +       int ret;
> +
> +       host = of_find_mipi_dsi_host_by_node(sn->host_node);
> +       if (!host) {
> +               DRM_DEV_ERROR(sn->dev, "failed to find dsi host\n");
> +               return -EPROBE_DEFER;
> +       }
> +
> +       dsi = mipi_dsi_device_register_full(host, &info);
> +       if (IS_ERR(dsi)) {
> +               DRM_DEV_ERROR(sn->dev, "failed to create dsi device\n");
> +               return PTR_ERR(sn->dsi);
> +       }
> +
> +       sn->dsi = dsi;
> +       dsi->lanes = sn->dsi_lanes;
> +       dsi->format = MIPI_DSI_FMT_RGB888;
> +       dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
> +
> +       ret = mipi_dsi_attach(dsi);
> +       if (ret) {
> +               DRM_DEV_ERROR(sn->dev, "failed to attach dsi host\n");
> +               goto err_dsi_attach;
> +       }
> +
> +       return drm_bridge_attach(bridge->encoder, sn->panel_bridge,
> +                                &sn->bridge, flags);
> +
> +err_dsi_attach:
> +       mipi_dsi_device_unregister(dsi);
> +       return ret;
> +}
> +
> +static const struct drm_bridge_funcs sn65dsi_bridge_funcs = {
> +       .attach         = sn65dsi_attach,
> +       .pre_enable     = sn65dsi_pre_enable,
> +       .enable         = sn65dsi_enable,
> +       .disable        = sn65dsi_disable,
> +       .post_disable   = sn65dsi_post_disable,
> +};
> +
> +static int sn65dsi_parse_dt(struct sn65dsi *sn)
> +{
> +       struct device *dev = sn->dev;
> +       struct device_node *endpoint, *parent;
> +       struct property *prop;
> +       struct drm_panel *panel;
> +       int len = 0;
> +       int ret;
> +
> +       sn->enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
> +       if (IS_ERR(sn->enable)) {
> +               DRM_DEV_ERROR(dev, "failed to get enable gpio\n");
> +               return PTR_ERR(sn->enable);
> +       }
> +
> +       ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);
> +       if (ret < 0)
> +               return ret;
> +       if (!panel)
> +               return -ENODEV;
> +
> +       sn->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
> +       if (IS_ERR(sn->panel_bridge))
> +               return PTR_ERR(sn->panel_bridge);
> +
> +       /*
> +        * To get the data-lanes of dsi, we need to access the port1 of dsi_out
> +        * from the port0 of bridge.
> +        */
> +       endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
> +       if (endpoint) {
> +               /* dsi_out node */
> +               parent = of_graph_get_remote_port_parent(endpoint);
> +               of_node_put(endpoint);
> +               if (parent) {
> +                       /* dsi port 1 */
> +                       endpoint = of_graph_get_endpoint_by_regs(parent, 1, -1);
> +                       of_node_put(parent);
> +                       if (endpoint) {
> +                               prop = of_find_property(endpoint, "data-lanes", &len);
> +                               of_node_put(endpoint);
> +                               if (!prop) {
> +                                       DRM_DEV_ERROR(dev, "failed to find data lane\n");
> +                                       return -EPROBE_DEFER;
> +                               }
> +                       }
> +               }
> +       }
> +
> +       sn->dsi_lanes = len / sizeof(u32);
> +       if (sn->dsi_lanes < 1 || sn->dsi_lanes > 4)
> +               return -EINVAL;
> +
> +       sn->host_node = of_graph_get_remote_node(dev->of_node, 0, 0);
> +       if (!sn->host_node)
> +               return -ENODEV;
> +
> +       of_node_put(sn->host_node);
> +
> +       return 0;
> +}
> +
> +static int sn65dsi_probe(struct i2c_client *client)
> +{
> +       struct sn65dsi *sn;
> +       int ret;
> +
> +       sn = devm_kzalloc(&client->dev, sizeof(*sn), GFP_KERNEL);
> +       if (!sn)
> +               return -ENOMEM;
> +
> +       i2c_set_clientdata(client, sn);
> +       sn->dev = &client->dev;
> +
> +       sn->regmap = devm_regmap_init_i2c(client, &sn65dsi_regmap_config);
> +       if (IS_ERR(sn->regmap)) {
> +               DRM_DEV_ERROR(&client->dev,
> +                             "regmap allocation failed (ret = %d)\n", ret);
> +               return PTR_ERR(sn->regmap);
> +       }
> +
> +       ret = sn65dsi_parse_dt(sn);
> +       if (ret)
> +               return ret;
> +
> +       sn->bridge.funcs = &sn65dsi_bridge_funcs;
> +       sn->bridge.of_node = client->dev.of_node;
> +
> +       drm_bridge_add(&sn->bridge);
> +
> +       return 0;
> +}
> +
> +static int sn65dsi_remove(struct i2c_client *client)
> +{
> +       struct sn65dsi *sn = i2c_get_clientdata(client);
> +
> +       drm_bridge_remove(&sn->bridge);
> +
> +       return 0;
> +}
> +
> +static struct i2c_device_id sn65dsi_i2c_id[] = {
> +       { "sn65dsi84", 0},
> +       { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(i2c, sn65dsi_i2c_id);
> +
> +static const struct of_device_id sn65dsi_match_table[] = {
> +       {.compatible = "ti,sn65dsi84"},
> +       { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, sn65dsi_match_table);
> +
> +static struct i2c_driver sn65dsi_driver = {
> +       .driver = {
> +               .name = "ti-sn65dsi84",
> +               .of_match_table = sn65dsi_match_table,
> +       },
> +       .probe_new = sn65dsi_probe,
> +       .remove = sn65dsi_remove,
> +       .id_table = sn65dsi_i2c_id,
> +};
> +module_i2c_driver(sn65dsi_driver);
> +
> +MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
> +MODULE_DESCRIPTION("SN65DSI84 DSI to LVDS bridge");
> +MODULE_LICENSE("GPL v2");
> --
> 2.25.1
>
>


-- 
Michael Nazzareno Trimarchi
Amarula Solutions BV
COO Co-Founder
Cruquiuskade 47 Amsterdam 1018 AM NL
T. +31(0)851119172
M. +39(0)3479132170
[`as] https://www.amarulasolutions.com