From nobody Fri Oct 2 07:45:33 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 74B0840EBA1; Tue, 4 Aug 2026 03:03:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785812637; cv=none; b=sZt0qIHqW41CWaLe4fyGh8/pYUTL2BhMdGbI6lDVfcUeCjgG8hMrRLgvYKHdhS9TXGDIB8H1RID9Bdm0yHH6LoiSF7YLk4koCcv0ZohGsVaI4xrZ5tR2EHwC8gom7WX670EnCRmmGO5nPQuGMg7SWdTuwndnjcdplp1TryZr3h8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785812637; c=relaxed/simple; bh=lA2DmJzriDcvH7vLXFl8ctxo5/s99YAuZ3P8QctO4ts=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nw5x2mzgCbyCto1e81XldjJyhspBHCgwdSFZplVKgf921iLQTZQHGUz0Ms7QfzedE9NAFxruGn/jS9wG5yV8oxNni1QBWTMeSKRkhq4u/B/ffKEkgTlb5m2C2mvcrXfuG7utvxzkiojtvEdLWg3RKTHh5w5QB1XNvptISwJPB/0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=liQNkW3V; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="liQNkW3V" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1785812636; x=1817348636; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lA2DmJzriDcvH7vLXFl8ctxo5/s99YAuZ3P8QctO4ts=; b=liQNkW3VslrppNlbv2Rr7k5dIC0kR/UVs0n28DnxhYwONDse4j/thSsr bDlPXWYHXdKsU6HmaAG5tJTSIPw2Bpkkq2ARnsYOUMHJr0f7dpyVENn5P ZloFV+SMwwAxysk3nTW0jv0/l7NBoLRS8zLxlR4/5YhZ0tt2e736T3sYZ l/YaVJuuG1pANRMZWb2yjJlJHGWpbh52eUC/N9uzL4mUyX+t2+wMhkQJF Pi1j10G+YKg2C1Tkl3LXqhwB2I+V7jXF/jAMnEBT1Iy6z3ZBvprT9CAim zc8USQS0xjAW5Hdz+5lRHfkn1O9be0GJn4yNOE79Wy0Q6tPWHvNFkiVns Q==; X-CSE-ConnectionGUID: 095v8TjyTGe40l9jaf1hyw== X-CSE-MsgGUID: cuKXaKEJRyqX32o0CecHkg== X-IronPort-AV: E=McAfee;i="6800,10657,11864"; a="103759417" X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="103759417" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:03:56 -0700 X-CSE-ConnectionGUID: OHeryRtxQJGUADaGvfVipQ== X-CSE-MsgGUID: jL+8s0SVQDKthgXdprztUg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="260139935" Received: from junjie-desk-dev.bj.intel.com (HELO junjie-desk-dev.tail2c02c1.ts.net) ([10.238.152.71]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:03:53 -0700 From: Junjie Cao To: Lee Jones , Daniel Thompson , Jingoo Han Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, Pengyu Luo , stable@vger.kernel.org, Junjie Cao Subject: [PATCH v3 1/3] backlight: aw99706: Fix DT property names to match binding Date: Tue, 4 Aug 2026 11:02:53 +0800 Message-ID: <20260804030255.1934470-2-junjie.cao@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260804030255.1934470-1-junjie.cao@intel.com> References: <20260804030255.1934470-1-junjie.cao@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Junjie Cao The driver reads four tuning properties without the unit suffixes that the binding mandates: "awinic,sw-freq" instead of "awinic,sw-freq-hz", "awinic,sw-ilmt" instead of "awinic,sw-ilmt-microamp", "awinic,iled-max" instead of "awinic,iled-max-microamp", and "awinic,uvlo-thres" instead of "awinic,uvlo-thres-microvolt". As a result, device_property_read_u32() never finds these properties in a binding-conformant device tree and silently falls back to the compiled-in defaults for switching frequency, switching current limit, max LED current, and UVLO threshold. Fix by aligning the property name strings in aw99706_dt_props[] with the binding. No value/range changes are needed since both sides already use the same units and enumerations. Fixes: 147b38a5ad06 ("backlight: aw99706: Add support for Awinic AW99706 ba= cklight") Cc: stable@vger.kernel.org Signed-off-by: Junjie Cao Reviewed-by: Daniel Thompson (RISCstar) --- drivers/video/backlight/aw99706.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/video/backlight/aw99706.c b/drivers/video/backlight/aw= 99706.c index 18299faf06ad..e130f164303a 100644 --- a/drivers/video/backlight/aw99706.c +++ b/drivers/video/backlight/aw99706.c @@ -130,23 +130,23 @@ static const struct aw99706_dt_prop aw99706_dt_props[= ] =3D { AW99706_CFG0_REG, AW99706_DIM_MODE_MASK, 1, }, { - "awinic,sw-freq", aw99706_dt_property_lookup, + "awinic,sw-freq-hz", aw99706_dt_property_lookup, aw99706_sw_freq_tbl, ARRAY_SIZE(aw99706_sw_freq_tbl), AW99706_CFG1_REG, AW99706_SW_FREQ_MASK, 750000, }, { - "awinic,sw-ilmt", aw99706_dt_property_lookup, + "awinic,sw-ilmt-microamp", aw99706_dt_property_lookup, aw99706_sw_ilmt_tbl, ARRAY_SIZE(aw99706_sw_ilmt_tbl), AW99706_CFG1_REG, AW99706_SW_ILMT_MASK, 3000000, }, { - "awinic,iled-max", aw99706_dt_property_iled_max_convert, + "awinic,iled-max-microamp", aw99706_dt_property_iled_max_convert, NULL, 0, AW99706_CFG2_REG, AW99706_ILED_MAX_MASK, 20000, =20 }, { - "awinic,uvlo-thres", aw99706_dt_property_lookup, + "awinic,uvlo-thres-microvolt", aw99706_dt_property_lookup, aw99706_ulvo_thres_tbl, ARRAY_SIZE(aw99706_ulvo_thres_tbl), AW99706_CFG2_REG, AW99706_UVLOSEL_MASK, 2200000, }, --=20 2.43.0 From nobody Fri Oct 2 07:45:33 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC7F52D1931; 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a="103759424" X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="103759424" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:04:01 -0700 X-CSE-ConnectionGUID: biiYxiQrSOuk0toZxzRvuQ== X-CSE-MsgGUID: I+i9IfBiR4y2t2qbP9+v8Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="260139962" Received: from junjie-desk-dev.bj.intel.com (HELO junjie-desk-dev.tail2c02c1.ts.net) ([10.238.152.71]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:03:58 -0700 From: Junjie Cao To: Lee Jones , Daniel Thompson , Jingoo Han Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, Pengyu Luo , Junjie Cao Subject: [PATCH v3 2/3] backlight: aw99706: Validate all DT property values consistently Date: Tue, 4 Aug 2026 11:02:54 +0800 Message-ID: <20260804030255.1934470-3-junjie.cao@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260804030255.1934470-1-junjie.cao@intel.com> References: <20260804030255.1934470-1-junjie.cao@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Junjie Cao The lookup helpers for dim-mode and ramp-ctl take a shortcut when lookup_tbl is NULL: they accept any u32 value without range-checking and return success unconditionally. Out-of-range values get silently truncated by regmap_update_bits instead of triggering the dev_warn + default-fallback path that the other properties use. Add a field-width check for the NULL-table case so that values exceeding the register field maximum are rejected the same way a table-lookup miss is. The switching frequency table has a second hole: reserved slots use 0 as their marker, so "awinic,sw-freq-hz =3D <0>" matches slot 0 and programs a reserved encoding. Make the reserved marker U32_MAX and skip such slots during lookup. While here, also switch the error returns to -EINVAL for consistency. Fixes: 147b38a5ad06 ("backlight: aw99706: Add support for Awinic AW99706 ba= cklight") Signed-off-by: Junjie Cao Reviewed-by: Daniel Thompson (RISCstar) --- drivers/video/backlight/aw99706.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/video/backlight/aw99706.c b/drivers/video/backlight/aw= 99706.c index e130f164303a..6ec49b6cb14c 100644 --- a/drivers/video/backlight/aw99706.c +++ b/drivers/video/backlight/aw99706.c @@ -60,7 +60,7 @@ #define AW99706_MTPLDOSEL_REG 0x1E #define AW99706_MTPRUN_REG 0x1F =20 -#define RESV 0 +#define RESV U32_MAX =20 /* Boost switching frequency table, in Hz */ static const u32 aw99706_sw_freq_tbl[] =3D { @@ -94,17 +94,19 @@ static int aw99706_dt_property_lookup(const struct aw99= 706_dt_prop *prop, int i; =20 if (!prop->lookup_tbl) { + if (dt_val > (prop->mask >> __ffs(prop->mask))) + return -EINVAL; *val =3D dt_val; return 0; } =20 for (i =3D 0; i < prop->tbl_size; i++) - if (prop->lookup_tbl[i] =3D=3D dt_val) + if (prop->lookup_tbl[i] !=3D RESV && prop->lookup_tbl[i] =3D=3D dt_val) break; =20 *val =3D i; =20 - return i =3D=3D prop->tbl_size ? -1 : 0; + return i =3D=3D prop->tbl_size ? -EINVAL : 0; } =20 #define MIN_ILED_MAX 5000 @@ -116,11 +118,14 @@ aw99706_dt_property_iled_max_convert(const struct aw9= 9706_dt_prop *prop, u32 dt_val, u8 *val) { if (dt_val > MAX_ILED_MAX || dt_val < MIN_ILED_MAX) - return -1; + return -EINVAL; + + if ((dt_val - MIN_ILED_MAX) % STEP_ILED_MAX) + return -EINVAL; =20 *val =3D (dt_val - MIN_ILED_MAX) / STEP_ILED_MAX; =20 - return (dt_val - MIN_ILED_MAX) % STEP_ILED_MAX; + return 0; } =20 static const struct aw99706_dt_prop aw99706_dt_props[] =3D { --=20 2.43.0 From nobody Fri Oct 2 07:45:33 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 32065225791; Tue, 4 Aug 2026 03:04:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785812646; cv=none; b=WkY+ke4vRLrU3HmEp6WfZeTmJopk0CiOJysQIqbj/XwMlEnRu42Mm9WZilYbM6PW0Pq/dHTMdrduGtouFBF3tkTWX2W2K/9D4SLbntaBrBwKRE7diASTewLTBF11WFlV+1Gwoqa9mUGHYl/BXytBnbcYAKKQazifd1nGndDxUGo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785812646; c=relaxed/simple; bh=j5qtUy7ODOvKHcirpmDeYnhjzJKBSG80aSpIZBvYENg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eZgre0fyLmcI8VrN1CmaEYCEwMz3a/OGgyhG+tcNVc+PnV0WTVmEGdlqEAFy+BHky5+4xUeabb++A6qQsPVkmXdCYVEGGFQWpXRPICBh9YWHTh1d8dEnt5FgaILNll4Mv+jJNsgV5ooTjiFHRJ7rLkIvamPC2JXQEe5sFx5h+UA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=L6AWTy0Y; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="L6AWTy0Y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1785812646; x=1817348646; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=j5qtUy7ODOvKHcirpmDeYnhjzJKBSG80aSpIZBvYENg=; b=L6AWTy0YbwUv0BQZv8i4d9O0lAHOmCT68Qqn63Z0J7gIF/y81lAtBaQA f38Jop9mfApz1xqIe6u8c3ds9F8zebAVkz8SdtbkdFY78cM7plCW6iX9s 8RDMGwNq2rbAcinB2n2BqYgHybofEbaublEQ0PdEMrxP8FwG6DCcC/dRU EsCb0W1TbH7hApfB+0Ml7mKAmzmAbqcjKvkGCFs5hnceQAqO1MRSsa/jU MO4x3liKtcRSt2ctzsbHBY0+1EKCogRR9w0ONLytu5Kx/a9jezzEnrE0H 8vUftBwxS3HZpJ63whZu+Cp+fzUXtDOq0EsxgpSf48qw2grSbrcasO5o3 A==; X-CSE-ConnectionGUID: Wg9rs6mVQf2HlYxddJgmUQ== X-CSE-MsgGUID: 6jcPh63NTvOtvkNWsbgSvw== X-IronPort-AV: E=McAfee;i="6800,10657,11864"; a="103759432" X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="103759432" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:04:06 -0700 X-CSE-ConnectionGUID: M82TH8EDTGWddIhK2wQ5UQ== X-CSE-MsgGUID: Q2Hn4vrmSgaE3PgIVBIyFA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,203,1779174000"; d="scan'208";a="260139984" Received: from junjie-desk-dev.bj.intel.com (HELO junjie-desk-dev.tail2c02c1.ts.net) ([10.238.152.71]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2026 20:04:03 -0700 From: Junjie Cao To: Lee Jones , Daniel Thompson , Jingoo Han Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, Pengyu Luo , stable@vger.kernel.org, Junjie Cao Subject: [PATCH v3 3/3] backlight: aw99706: Honor the core blank state in update_status() Date: Tue, 4 Aug 2026 11:02:55 +0800 Message-ID: <20260804030255.1934470-4-junjie.cao@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260804030255.1934470-1-junjie.cao@intel.com> References: <20260804030255.1934470-1-junjie.cao@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Junjie Cao update_status() passes props.brightness straight to the hardware and ignores the power/blank state tracked by the core. Writing 4 to the bl_power sysfs attribute or blanking the framebuffer therefore leaves the backlight lit. Use backlight_get_brightness(), which returns 0 while the device is blanked. Fixes: 147b38a5ad06 ("backlight: aw99706: Add support for Awinic AW99706 ba= cklight") Cc: stable@vger.kernel.org Signed-off-by: Junjie Cao Reviewed-by: Daniel Thompson (RISCstar) --- drivers/video/backlight/aw99706.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/backlight/aw99706.c b/drivers/video/backlight/aw= 99706.c index 6ec49b6cb14c..c4a66b59ecf1 100644 --- a/drivers/video/backlight/aw99706.c +++ b/drivers/video/backlight/aw99706.c @@ -340,7 +340,7 @@ static int aw99706_bl_update_status(struct backlight_de= vice *bl) { struct aw99706_device *aw =3D bl_get_data(bl); =20 - return aw99706_update_brightness(aw, bl->props.brightness); + return aw99706_update_brightness(aw, backlight_get_brightness(bl)); } =20 static const struct backlight_ops aw99706_bl_ops =3D { --=20 2.43.0