From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout1.samsung.com (mailout1.samsung.com [203.254.224.24]) (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 CC816238C0A for ; Mon, 25 Aug 2025 12:02:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.24 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756123328; cv=none; b=gtA6jH1KkPrtmPXAO3egWSGgi07m/4ajPfJHX7Jym2hrK7wDBFl6qlhOmfNgkkcvONveCbiIU5d2oC1t/MHL4kuEBKZEqiiTNkomEQ57Ahk5nBrKD2qh6Ll8gm42ei1hziBBbTfQMnz64ISgudjL5F/cUla4S4Up9XtrmhrKKXs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756123328; c=relaxed/simple; bh=+FzwHF8KuNzlOWaaKrrdM7RTgM5W1jyxUgMxJOzJj4g=; h=From:To:Cc:In-Reply-To:Subject:Date:Message-ID:MIME-Version: Content-Type:References; b=b9ck3TBdKO2q/zuG5eH1urUgtn9Ie021SS2nqwmuM4vvIJWYSMFQ7hiCIpOdmFtokwoKfEutMeiuGnvg2hRGOnq5qIqhGhFZOLbhXbJvhKM4RgSfqxj9js1RGCYa2vF51PlgfJaK6oBKxEKIm+ph8X7o4KmcblFgzbnea4UOgGw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=cYziQjLJ; arc=none smtp.client-ip=203.254.224.24 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="cYziQjLJ" Received: from epcas5p3.samsung.com (unknown [182.195.41.41]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20250825120204epoutp0137af8a30c21c2f87eaf2a8ce289527ca~fANwThqD03142531425epoutp01N for ; Mon, 25 Aug 2025 12:02:04 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20250825120204epoutp0137af8a30c21c2f87eaf2a8ce289527ca~fANwThqD03142531425epoutp01N DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1756123324; bh=+FzwHF8KuNzlOWaaKrrdM7RTgM5W1jyxUgMxJOzJj4g=; h=From:To:Cc:In-Reply-To:Subject:Date:References:From; b=cYziQjLJ2pZX+j8U/8EwOGgqhIx2xStM1PACDs79uontzUR5RP99yKw+VKgpYFIST iZiZ7kYFjO3EFHpwE5NUXlIsjM+DfLCjU4O2fYUXWXFK9eaBufESztX40L1fmjqTQl Kh8kEUycYsqxnrLTktroB9vGuydDz0PqduPadSbo= Received: from epsnrtp02.localdomain (unknown [182.195.42.154]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPS id 20250825120203epcas5p1c6378c60ea36aa87f171b0477956f62a~fANuuWErA2818828188epcas5p1x; Mon, 25 Aug 2025 12:02:03 +0000 (GMT) Received: from epcas5p3.samsung.com (unknown [182.195.38.95]) by epsnrtp02.localdomain (Postfix) with ESMTP id 4c9TtL13lDz2SSKZ; Mon, 25 Aug 2025 12:02:02 +0000 (GMT) Received: from epsmtip2.samsung.com (unknown [182.195.34.31]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20250825120201epcas5p2d4daa5629b3552586363349fb30e94e0~fANs7W8Nk0034600346epcas5p2Z; Mon, 25 Aug 2025 12:02:01 +0000 (GMT) Received: from FDSFTE196 (unknown [107.116.189.214]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250825120157epsmtip265a67df65657294b364f9f90edabfe52~fANpJa82N2901829018epsmtip2W; Mon, 25 Aug 2025 12:01:57 +0000 (GMT) From: "Inbaraj E" To: "'Krzysztof Kozlowski'" , , , , , , , , , , , , , , , , , , , Cc: , , , , , , , , , , In-Reply-To: <2eaa1303-79e6-431e-9902-356862357c9f@kernel.org> Subject: RE: [PATCH v2 10/12] dt-bindings: media: fsd: Document CSIS DMA controller Date: Mon, 25 Aug 2025 17:31:56 +0530 Message-ID: <015a01dc15b8$1095f0e0$31c1d2a0$@samsung.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 X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQK5oFMD+tt4mLQU5V9KgVyIDaUIUQIMxZSZAiExi2YA0x2iDwJfHwx3AsbuavuyZvR80A== Content-Language: en-in X-CMS-MailID: 20250825120201epcas5p2d4daa5629b3552586363349fb30e94e0 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-541,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20250814141051epcas5p14dccee388087372973988aeebcb872cf References: <20250814140943.22531-1-inbaraj.e@samsung.com> <20250814140943.22531-11-inbaraj.e@samsung.com> <00e201dc13d7$17d2a750$4777f5f0$@samsung.com> <2eaa1303-79e6-431e-9902-356862357c9f@kernel.org> Hi Krzysztof, > > According to the HW design of FSD SoC, the control to manage CSIS > > power is given to a separate CPU where custom firmware runs. > > Therefore. The Linux side does not control the CSIS power supplies dire= ctly > and are hence not included in the device tree. >=20 > Usually this still means you vote for enabling these resources, at least = for > other vendors it is like that. Unless you want to say these are essential= ly > always on and CANNOT be disabled ever. Yes, we want IP to remain enabled permanently, So we are not adding power s= upply control in linux. Regards, Inbaraj E