On Sun, Aug 02, 2020 at 01:06:30PM +0200, Sam Ravnborg wrote:
> - Use blacklight_get_brightness() helper
> - Use devm_ variant to register backlight device and drop explicit
> unregister
> - Use macro for initialization
>
> Signed-off-by: Sam Ravnborg <s...@ravnborg.org>
> Cc: Andrzej Hajda <a.ha...@samsung.com>
> Cc: Neil Armstrong <narmstr...@baylibre.com>
> Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Cc: Jonas Karlman <jo...@kwiboo.se>
> Cc: Jernej Skrabec <jernej.skra...@siol.net>
Build errors fixed, will be included in v2.
Sam
> ---
> drivers/gpu/drm/bridge/parade-ps8622.c | 43 +++++++++++++-------------
> 1 file changed, 21 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c
> b/drivers/gpu/drm/bridge/parade-ps8622.c
> index d789ea2a7fb9..9304484e7f71 100644
> --- a/drivers/gpu/drm/bridge/parade-ps8622.c
> +++ b/drivers/gpu/drm/bridge/parade-ps8622.c
> @@ -284,8 +284,7 @@ static int ps8622_send_config(struct ps8622_bridge
> *ps8622)
> goto error;
>
> /* FFh for 100% brightness, 0h for 0% brightness */
> - err = ps8622_set(cl, 0x01, 0xa7,
> - ps8622->bl->props.brightness);
> + err = ps8622_set(cl, 0x01, 0xa7,
> backlight_get_brightness(ps8622->bl));
> if (err)
> goto error;
> } else {
> @@ -331,18 +330,11 @@ static int ps8622_send_config(struct ps8622_bridge
> *ps8622)
> static int ps8622_backlight_update(struct backlight_device *bl)
> {
> struct ps8622_bridge *ps8622 = dev_get_drvdata(&bl->dev);
> - int ret, brightness = bl->props.brightness;
> -
> - if (bl->props.power != FB_BLANK_UNBLANK ||
> - bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
> - brightness = 0;
>
> if (!ps8622->enabled)
> return -EINVAL;
>
> - ret = ps8622_set(ps8622->client, 0x01, 0xa7, brightness);
> -
> - return ret;
> + return ps8622_set(ps8622->client, 0x01, 0xa7,
> blacklight_get_brightness(bl));
> }
>
> static const struct backlight_ops ps8622_backlight_ops = {
> @@ -521,7 +513,23 @@ static const struct drm_bridge_funcs ps8622_bridge_funcs
> = {
> .attach = ps8622_attach,
> };
>
> -static const struct of_device_id ps8622_devices[] = {
> +static int ps8622_register_blacklight(struct ps8622_bridge *ps8622)
> +{
> + DECLARE_BACKLIGHT_INIT_RAW(props, PS8622_MAX_BRIGHTNESS,
> PS8622_MAX_BRIGHTNESS);
> + backlight_device *bl;
> +
> + bl = devm_backlight_device_register(dev, dev_name(dev), dev,
> + ps8622, &ps8622_backlight_ops,
> &props);
> + if (IS_ERR(bl)) {
> + DRM_ERROR("failed to register backlight\n");
> + return PTR_ERR(bl);
> + }
> +
> + ps8622->bl = bl;
> + return 0;
> +}
> +
> +const struct of_device_id ps8622_devices[] = {
> {.compatible = "parade,ps8622",},
> {.compatible = "parade,ps8625",},
> {}
> @@ -581,17 +589,9 @@ static int ps8622_probe(struct i2c_client *client,
> }
>
> if (!of_find_property(dev->of_node, "use-external-pwm", NULL)) {
> - ps8622->bl = backlight_device_register("ps8622-backlight",
> - dev, ps8622, &ps8622_backlight_ops,
> - NULL);
> - if (IS_ERR(ps8622->bl)) {
> - DRM_ERROR("failed to register backlight\n");
> - ret = PTR_ERR(ps8622->bl);
> - ps8622->bl = NULL;
> + ret = ps8622_register_blacklight(ps8622);
> + if (ret)
> return ret;
> - }
> - ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS;
> - ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS;
> }
>
> ps8622->bridge.funcs = &ps8622_bridge_funcs;
> @@ -607,7 +607,6 @@ static int ps8622_remove(struct i2c_client *client)
> {
> struct ps8622_bridge *ps8622 = i2c_get_clientdata(client);
>
> - backlight_device_unregister(ps8622->bl);
> drm_bridge_remove(&ps8622->bridge);
>
> return 0;
> --
> 2.25.1
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