From nobody Mon Feb 9 21:03:16 2026 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 8A76DEB64DD for ; Sat, 8 Jul 2023 08:41:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229751AbjGHIlA (ORCPT ); Sat, 8 Jul 2023 04:41:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229876AbjGHIk5 (ORCPT ); Sat, 8 Jul 2023 04:40:57 -0400 Received: from aposti.net (aposti.net [89.234.176.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EEEB61FE0; Sat, 8 Jul 2023 01:40:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1688805640; 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=6+AqvnlESMt4eGXysB+WU7X0HzVbXxlbD86pN2OtT+U=; b=JsxMJzckQmaOdeCcP31JQuVyvWP+HhcsEyUShqxfnLig35BdIwL/wTBtZWhB5LtEy097js cuLkcV+mVyOazDjsDHTHtJv527lJtX/3ObpoQWYoPtp1nPQA4c1bUb0ilS2cF1Ii5kXdxK japyWh109wRYEGhkst2nKHWeYYSnnc8= 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 v2 2/3] drm/panel: ld9040: Register a backlight device Date: Sat, 8 Jul 2023 10:40:26 +0200 Message-Id: <20230708084027.18352-3-paul@crapouillou.net> In-Reply-To: <20230708084027.18352-1-paul@crapouillou.net> References: <20230708084027.18352-1-paul@crapouillou.net> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam: Yes Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Register a backlight device to be able to switch between all the gamma levels. v2: Remove .get_brightness() callback, use bl_get_data() and backlight_get_brightness() Signed-off-by: Paul Cercueil --- drivers/gpu/drm/panel/panel-samsung-ld9040.c | 32 +++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panel/panel-samsung-ld9040.c b/drivers/gpu/drm= /panel/panel-samsung-ld9040.c index f39f999c21af..ad5ed635f592 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 */ =20 +#include #include #include #include @@ -310,8 +311,30 @@ static int ld9040_parse_dt(struct ld9040 *ctx) return 0; } =20 +static int ld9040_bl_update_status(struct backlight_device *dev) +{ + struct ld9040 *ctx =3D bl_get_data(dev); + + ctx->brightness =3D backlight_get_brightness(dev); + ld9040_brightness_set(ctx); + + return 0; +} + +static const struct backlight_ops ld9040_bl_ops =3D { + .update_status =3D ld9040_bl_update_status, +}; + +static const struct backlight_properties ld9040_bl_props =3D { + .type =3D BACKLIGHT_RAW, + .scale =3D BACKLIGHT_SCALE_NON_LINEAR, + .max_brightness =3D ARRAY_SIZE(ld9040_gammas) - 1, + .brightness =3D ARRAY_SIZE(ld9040_gammas) - 1, +}; + static int ld9040_probe(struct spi_device *spi) { + struct backlight_device *bldev; struct device *dev =3D &spi->dev; struct ld9040 *ctx; int ret; @@ -323,7 +346,7 @@ static int ld9040_probe(struct spi_device *spi) spi_set_drvdata(spi, ctx); =20 ctx->dev =3D dev; - ctx->brightness =3D ARRAY_SIZE(ld9040_gammas) - 1; + ctx->brightness =3D ld9040_bl_props.brightness; =20 ret =3D ld9040_parse_dt(ctx); if (ret < 0) @@ -353,6 +376,13 @@ static int ld9040_probe(struct spi_device *spi) drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs, DRM_MODE_CONNECTOR_DPI); =20 + + bldev =3D 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); =20 return 0; --=20 2.40.1