From patchwork Mon Jul 3 21:47:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 700632 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58ADBEB64DD for ; Mon, 3 Jul 2023 21:48:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231301AbjGCVsA (ORCPT ); Mon, 3 Jul 2023 17:48:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231316AbjGCVrz (ORCPT ); Mon, 3 Jul 2023 17:47:55 -0400 Received: from aposti.net (aposti.net [89.234.176.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA61910EC; Mon, 3 Jul 2023 14:47:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1688420847; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oSVu9zN3Z7FGQFi9DqYFaRkee0OgOav2Bk1wOeBtGYc=; b=RKg1Gt9zR7825mopAtoJWrfdnCagok+w3KhRM/9TQ6vlc7X2WIX60WCSQvaDK/OzN6JpH2 3koPY79DI0JglsrJ281eXLYen7CfnzVT+2av3neFJ3WTzRz/XHx+r9jizQaCboZr1DoAHc i0AGWAOqJJxR7X25X9t2hoo2hSGHpMs= From: Paul Cercueil To: Krzysztof Kozlowski , Rob Herring , Conor Dooley , Alim Akhtar , Neil Armstrong , Sam Ravnborg Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Paul Cercueil Subject: [PATCH 2/3] drm/panel: ld9040: Register a backlight device Date: Mon, 3 Jul 2023 23:47:14 +0200 Message-Id: <20230703214715.623447-3-paul@crapouillou.net> In-Reply-To: <20230703214715.623447-1-paul@crapouillou.net> References: <20230703214715.623447-1-paul@crapouillou.net> MIME-Version: 1.0 X-Spam: Yes Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Register a backlight device to be able to switch between all the gamma levels. Signed-off-by: Paul Cercueil --- drivers/gpu/drm/panel/panel-samsung-ld9040.c | 40 ++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-samsung-ld9040.c b/drivers/gpu/drm/panel/panel-samsung-ld9040.c index 7fd9444b42c5..b4f87d6244cb 100644 --- a/drivers/gpu/drm/panel/panel-samsung-ld9040.c +++ b/drivers/gpu/drm/panel/panel-samsung-ld9040.c @@ -8,6 +8,7 @@ * Andrzej Hajda */ +#include #include #include #include @@ -311,8 +312,40 @@ static int ld9040_parse_dt(struct ld9040 *ctx) return 0; } +static int ld9040_bl_update_status(struct backlight_device *dev) +{ + struct ld9040 *ctx = dev_get_drvdata(&dev->dev); + + ctx->brightness = dev->props.brightness; + ld9040_brightness_set(ctx); + + return 0; +} + +static int ld9040_bl_get_intensity(struct backlight_device *dev) +{ + if (dev->props.fb_blank == FB_BLANK_UNBLANK && + dev->props.power == FB_BLANK_UNBLANK) + return dev->props.brightness; + + return 0; +} + +static const struct backlight_ops ld9040_bl_ops = { + .get_brightness = ld9040_bl_get_intensity, + .update_status = ld9040_bl_update_status, +}; + +static const struct backlight_properties ld9040_bl_props = { + .type = BACKLIGHT_RAW, + .scale = BACKLIGHT_SCALE_NON_LINEAR, + .max_brightness = ARRAY_SIZE(ld9040_gammas) - 1, + .brightness = ARRAY_SIZE(ld9040_gammas) - 1, +}; + static int ld9040_probe(struct spi_device *spi) { + struct backlight_device *bldev; struct device *dev = &spi->dev; struct ld9040 *ctx; int ret; @@ -354,6 +387,13 @@ static int ld9040_probe(struct spi_device *spi) drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs, DRM_MODE_CONNECTOR_DPI); + + bldev = devm_backlight_device_register(dev, dev_name(dev), dev, + ctx, &ld9040_bl_ops, + &ld9040_bl_props); + if (IS_ERR(bldev)) + return PTR_ERR(bldev); + drm_panel_add(&ctx->panel); return 0;