From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) (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 BE04229C321 for ; Wed, 28 Jan 2026 11:10:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.118.77.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769598623; cv=none; b=j7WHXv9QoY68jH3CdRd5MjzzXWVNfFpwIOf92C8FxZaEM9zumbwxeyEbbLJiOTKUVGN16D2H8B8qYWt64+bkitlO1TSaqiYv8EDdDJMfcGSql1L6Vxq2lWggaRxHix7nQFnxcWvIGdLkPCk1gcbdp6c7Vym0edUGhTqirmAslIg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769598623; c=relaxed/simple; bh=vbouGZx3a175eMpkN5/+6+Ii1sJexF9yeGBH8vqfnRM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:From:In-Reply-To: Content-Type:References; b=EvQGtQOWvvMcx7gzHXaV58cLXFXRdzn93NtmIa77WJN3RyHY/DOdl9UKK4f2Jq8RCNkVWfFqx1mmYh1upQVF10nlpIaFsnPg/13W/CtIVSOlP/u4UPUB4R19ULWAg8WbupLS5dEBICQR3eJ1npKgng6wZvOYvUoy5DtQWUrsLuk= 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=e7TIY0mV; arc=none smtp.client-ip=210.118.77.11 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="e7TIY0mV" Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20260128111012euoutp01688205235e7edde30587eacffe8a3f67~O4I-uDxfO3161231612euoutp01V for ; Wed, 28 Jan 2026 11:10:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20260128111012euoutp01688205235e7edde30587eacffe8a3f67~O4I-uDxfO3161231612euoutp01V DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1769598612; bh=45jaImfVH7kr/nS0FqB71oJKgUEPUgwMAJFDZ02gS2I=; h=Date:Subject:To:Cc:From:In-Reply-To:References:From; b=e7TIY0mVVbHRZJQwi+WMMav97sC49+KwDu2GGaWW+C4sNN0zeUrKZUzpkRdRKQvkw pHI9z2tl4ich1br8bHnxz0ndvvkghRdfemCwwnPSD6jHa2qm4m+aRTMOnow5zvN4O0 mdJv583zDVUIh3mIu+McfZ/J0GXG6r57pO1WsQn0= Received: from eusmtip1.samsung.com (unknown [203.254.199.221]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20260128111011eucas1p2b98d9b06481ae6d47968b83ec0ed491c~O4I-SdpCE2976529765eucas1p2U; Wed, 28 Jan 2026 11:10:11 +0000 (GMT) Received: from [106.210.134.192] (unknown [106.210.134.192]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20260128111011eusmtip1807cf713c50c74db811a812a02bdb2e4~O4I_kWAQE1268412684eusmtip1Y; Wed, 28 Jan 2026 11:10:11 +0000 (GMT) Message-ID: Date: Wed, 28 Jan 2026 12:10:10 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Betterbird (Windows) Subject: Re: [PATCH 0/3] Fixes and enhancements for Exynos (7870) DSIM bridge driver To: Kaustabh Chakraborty , Inki Dae , Jagan Teki , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Content-Language: en-US From: Marek Szyprowski In-Reply-To: <20260124-exynos-dsim-fixes-v1-0-122d047a23d1@disroot.org> Content-Transfer-Encoding: 7bit X-CMS-MailID: 20260128111011eucas1p2b98d9b06481ae6d47968b83ec0ed491c X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20260124172131eucas1p2bd0fa9cde2981c87238deb67cf5f0554 X-EPHeader: CA X-CMS-RootMailID: 20260124172131eucas1p2bd0fa9cde2981c87238deb67cf5f0554 References: <20260124-exynos-dsim-fixes-v1-0-122d047a23d1@disroot.org> On 24.01.2026 18:20, Kaustabh Chakraborty wrote: > Since v6.17, there were a few regressive changes for the Exynos 7870 > DSIM driver. These changes resulted in weird artifacts on the display, > such as random RGB channel swaps and random aberration (the occurrences > of both were mutually exclusive). > > The first two commits of this patch series address the aforementioned > changes. > > The third patch replaces an implicit loop for waiting for PLL > stabilization with an interrupt-based solution, which should be more > reliable. This solution was suggested by Inki Dae in a discussion of an > earlier patch series sent by me. For further details, refer to its > commit description. > > Signed-off-by: Kaustabh Chakraborty Works fine on legacy Exynos based boards in my test lab. Tested-by: Marek Szyprowski > --- > Kaustabh Chakraborty (3): > drm/bridge: samsung-dsim: move bridge init sequence to atomic_enable > drm/bridge: samsung-dsim: enable MFLUSH_VS for Exynos 7870 DSIM > drm/bridge: samsung-dsim: use DSIM interrupt to wait for PLL stability > > drivers/gpu/drm/bridge/samsung-dsim.c | 61 +++++++++++++++++++++++------------ > include/drm/bridge/samsung-dsim.h | 1 + > 2 files changed, 42 insertions(+), 20 deletions(-) > --- > base-commit: ca3a02fda4da8e2c1cb6baee5d72352e9e2cfaea > change-id: 20260124-exynos-dsim-fixes-5383d6a6f073 > > Best regards, Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland