From nobody Mon Feb 9 17:05:08 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 3931C2459D1; Mon, 1 Sep 2025 21:01:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756760513; cv=none; b=dHtdVwGVso7aMMUP82/v80sjJxcxEef6DkmAgBJwLyzrCMTybXivQT7c53cpdiSJHwu9ZQRr51u+OF3q7TOP5H/wycN0I+++ubWrTV6Ji62p4Zrn6KODr7q4ADiyhbYpIss/ONAv+88JLb0/1HEbEcqtNgGNOZVnufELp08Zn0M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756760513; c=relaxed/simple; bh=wzR4Qs8i+nZbzUbJH0z7ZvWkf0jeanCfOT0T/c8WVY0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nPMTm3EX6YX//E47/2RvfQTmzuAuGEYTmJ7onYXO9G1Jdvb6sRwKrxRWNvl6sM3mjJJsygeTxoTZtD1hh2YGKeOfdBVnSKBCJIeF4JArCXWMpOlMxQ675jEKWzJ2vVwbcP8PNl8UtnqivlT/7o7N7MJrWhtTDImawIA0wUShzrE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KrgHM3Se; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KrgHM3Se" Received: by smtp.kernel.org (Postfix) with ESMTPS id D3B51C4CEFE; Mon, 1 Sep 2025 21:01:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756760512; bh=wzR4Qs8i+nZbzUbJH0z7ZvWkf0jeanCfOT0T/c8WVY0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=KrgHM3SeV6URt8G9/vWzTXxnVaHDOEDBGUPwCbk7K1eEHgAgdOerbADZGKoiSS6RL ZptWcoQffh2gYydUz7q9XmrChuVYEZiw0p1WmgXOjI1fd5pubZFShhklnpGV8/JNxt D3y/eXTCuGtQDrEdLkzW7mLoMvcPAitpcsf8ezg+vTRRDBMcSXD3SbFA/6GCHMd0/x dGexMiigs+HM2hgJN3711Iy3gQvRNKp+VHs6R87Ojc5xrtxCALry2iW9Dp0kVzReXr tCViXTT02Xfk0VDLstipWaaWHVTAtTLNNa3isN0lmBNU4afHDhzRXNdDaOAJERCDf1 PAjSfTf+9Er8w== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0C16CA1007; Mon, 1 Sep 2025 21:01:52 +0000 (UTC) From: Michael Riesch via B4 Relay Date: Mon, 01 Sep 2025 22:47:45 +0200 Subject: [PATCH v3 4/7] phy: rockchip: phy-rockchip-inno-csidphy: allow writes to grf register 0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250616-rk3588-csi-dphy-v3-4-a5ccd5f1f438@collabora.com> References: <20250616-rk3588-csi-dphy-v3-0-a5ccd5f1f438@collabora.com> In-Reply-To: <20250616-rk3588-csi-dphy-v3-0-a5ccd5f1f438@collabora.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Kever Yang , Jagan Teki , Sebastian Reichel , Diederik de Haas , Neil Armstrong , Heiko Stuebner , Collabora Kernel Team Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, Michael Riesch X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1756759662; l=1635; i=michael.riesch@collabora.com; s=20250410; h=from:subject:message-id; bh=l+DL7hvrQb52Alb7OjVyKnZ7Z6pkTmglNXwtSvoPg4M=; b=VBFa5PVV+22ZkBz4mEv89SE3mpULD6Gqp49UwNptsIWrtomhKNQUoNYSe2JnT756e/eyHOWH6 Vftcu8BdJF/Dil2nAXwnqCv++Sxfomn8BmTNbQv4p96wHKkSqjH2reL X-Developer-Key: i=michael.riesch@collabora.com; a=ed25519; pk=+MWX1fffLFZtTPG/I6XdYm/+OSvpRE8D9evQaWbiN04= X-Endpoint-Received: by B4 Relay for michael.riesch@collabora.com/20250410 with auth_id=371 X-Original-From: Michael Riesch Reply-To: michael.riesch@collabora.com From: Michael Riesch The driver for the Rockchip MIPI CSI-2 DPHY uses GRF register offset value 0 to sort out undefined registers. However, the RK3588 CSIDPHY GRF this offset is perfectly fine (in fact, register 0 is the only one in this register file). Introduce a boolean variable to indicate valid registers and allow writes to register 0. Reviewed-by: Neil Armstrong Signed-off-by: Michael Riesch --- drivers/phy/rockchip/phy-rockchip-inno-csidphy.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c b/drivers/phy= /rockchip/phy-rockchip-inno-csidphy.c index 2ab99e1d47eb..75533d071025 100644 --- a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c +++ b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c @@ -87,10 +87,11 @@ struct dphy_reg { u32 offset; u32 mask; u32 shift; + u8 valid; }; =20 #define PHY_REG(_offset, _width, _shift) \ - { .offset =3D _offset, .mask =3D BIT(_width) - 1, .shift =3D _shift, } + { .offset =3D _offset, .mask =3D BIT(_width) - 1, .shift =3D _shift, .val= id =3D 1, } =20 static const struct dphy_reg rk1808_grf_dphy_regs[] =3D { [GRF_DPHY_CSIPHY_FORCERXMODE] =3D PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 4,= 0), @@ -145,7 +146,7 @@ static inline void write_grf_reg(struct rockchip_inno_c= sidphy *priv, const struct dphy_drv_data *drv_data =3D priv->drv_data; const struct dphy_reg *reg =3D &drv_data->grf_regs[index]; =20 - if (reg->offset) + if (reg->valid) regmap_write(priv->grf, reg->offset, HIWORD_UPDATE(value, reg->mask, reg->shift)); } --=20 2.39.5