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From: Stephen Boyd <swboyd@chromium.org>
To: LKML <linux-kernel@vger.kernel.org>,
	Philip Chen <philipchen@chromium.org>
Cc: dianders@chromium.org, Andrzej Hajda <a.hajda@samsung.com>,
	Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Robert Foss <robert.foss@linaro.org>,
	dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 1/2] drm/bridge: parade-ps8640: Use regmap APIs
Date: Wed, 8 Sep 2021 21:54:42 +0000	[thread overview]
Message-ID: <CAE-0n52ia_Em6GYU-ketmzi4OQxcdux3uLjMGhzVTUJbC0Yz-Q@mail.gmail.com> (raw)
In-Reply-To: <20210908111500.1.I9f6dac462da830fa0a8ccccbe977ca918bf14e4a@changeid>

Quoting Philip Chen (2021-09-08 11:18:05)
> diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> index 685e9c38b2db..a16725dbf912 100644
> --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> @@ -64,12 +65,29 @@ struct ps8640 {
>         struct drm_bridge *panel_bridge;
>         struct mipi_dsi_device *dsi;
>         struct i2c_client *page[MAX_DEVS];
> +       struct regmap   *regmap[MAX_DEVS];
>         struct regulator_bulk_data supplies[2];
>         struct gpio_desc *gpio_reset;
>         struct gpio_desc *gpio_powerdown;
>         bool powered;
>  };
>
> +static const struct regmap_range ps8640_volatile_ranges[] = {
> +       { .range_min = 0, .range_max = 0xff },

Is the plan to fill this out later or is 0xff the max register? If it's
the latter then I think adding the max register to regmap_config is
simpler.

> +};
> +
> +static const struct regmap_access_table ps8640_volatile_table = {
> +       .yes_ranges = ps8640_volatile_ranges,
> +       .n_yes_ranges = ARRAY_SIZE(ps8640_volatile_ranges),
> +};
> +
> +static const struct regmap_config ps8640_regmap_config = {
> +       .reg_bits = 8,
> +       .val_bits = 8,
> +       .volatile_table = &ps8640_volatile_table,
> +       .cache_type = REGCACHE_NONE,
> +};
> +
>  static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
>  {
>         return container_of(e, struct ps8640, bridge);
> @@ -78,13 +96,13 @@ static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
>  static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,
>                                      const enum ps8640_vdo_control ctrl)
>  {
> -       struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1];
> -       u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl };
> +       struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];
> +       u8 vdo_ctrl_buf[] = {VDO_CTL_ADD, ctrl};

Nitpick: Add a space after { and before }.

>         int ret;
>
> -       ret = i2c_smbus_write_i2c_block_data(client, PAGE3_SET_ADD,
> -                                            sizeof(vdo_ctrl_buf),
> -                                            vdo_ctrl_buf);
> +       ret = regmap_bulk_write(map, PAGE3_SET_ADD,
> +                               vdo_ctrl_buf, sizeof(vdo_ctrl_buf));
> +
>         if (ret < 0) {
>                 DRM_ERROR("failed to %sable VDO: %d\n",
>                           ctrl == ENABLE ? "en" : "dis", ret);

  parent reply	other threads:[~2021-09-08 21:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 18:18 Philip Chen
2021-09-08 18:18 ` [PATCH 2/2] drm/bridge: parade-ps8640: Add support for AUX channel Philip Chen
2021-09-08 22:27   ` Stephen Boyd
2021-09-09 18:15     ` Philip Chen
2021-09-09 19:07       ` Stephen Boyd
2021-09-13 21:35         ` Philip Chen
2021-09-08 21:54 ` Stephen Boyd [this message]
2021-09-09 18:29   ` [PATCH 1/2] drm/bridge: parade-ps8640: Use regmap APIs Philip Chen
2021-09-09 19:09     ` Stephen Boyd
2021-09-09 21:14       ` Doug Anderson
2021-09-09 21:27         ` Stephen Boyd
2021-09-13 21:36           ` Philip Chen

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