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<93da6166-79c2-4f26-b69c-8fe62f4698da@nxp.com> Date: Thu, 29 Jan 2026 11:41:40 +0800 User-Agent: Mozilla Thunderbird Subject: Re: (subset) [PATCH 0/3] drm/bridge: imx: A few fixes To: Luca Ceresoli , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260123-imx8qxp-drm-bridge-fixes-v1-0-8bb85ada5866@nxp.com> <176951374753.94588.10653964166300906894.b4-ty@bootlin.com> From: Liu Ying Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 X-ClientProxiedBy: SG2PR03CA0098.apcprd03.prod.outlook.com (2603:1096:4:7c::26) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) Precedence: bulk X-Mailing-List: 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686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: uUFocWChs+53DLODcXMuaaoJdDn9IW5YYuq6/U2S3mFIOMXyfINxyiJMzXrasQjyVGKtUwO6CPf5cRXJY1fU6Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB9833 On Wed, Jan 28, 2026 at 04:26:22PM +0100, Luca Ceresoli wrote: > Hello Liu, Hello Luca, > > On Wed Jan 28, 2026 at 2:50 AM CET, Liu Ying wrote: >> Hi Luca, >> >> On Tue, Jan 27, 2026 at 12:35:47PM +0100, Luca Ceresoli wrote: >>> >>> On Fri, 23 Jan 2026 17:22:14 +0800, Liu Ying wrote: >>>> This patch series contains 3 bug fixes for i.MX8QXP DRM bridges. >>>> Each patch fixes a NULL pointer dereference issue and stands alone. >>>> >>>> >>> >>> Applied, thanks! >>> >>> [1/3] drm/bridge: imx8qxp-ldb: Fix NULL pointer dereference in imx8qxp_ldb_bridge_destroy() >>> commit: 852c68bf42965ee38b465d2d6f7b965eb0b5dc1d >>> [2/3] drm/bridge: imx8qxp-pxl2dpi: Fix NULL pointer dereference in imx8qxp_pxl2dpi_bridge_destroy() >>> commit: db7e7ea838c916ee4cdf26bee126fd36f58295dc >> >> Any reason why patch 3/3 is not applied? > > Yes, the reason is there's a patch conflict and I still have to find out > how to handle it. > > Patch 3 by the rules [0] should go to drm-misc-fixes because the bug (added > by [1]) is already on Linus' master tree (since v6.17), but it does not > apply there due to a conflict with an unrelated change [2] currently on > drm-misc-next. > > Note that [1] and [2] are the two commits mentioned in your 'Fixes: 'tags. > > I had a chat with Maxime on #dir-devel about how to handle this situation > but still haven't got a final answer. > > I guess the correct way is: > > 1. apply patch 3 on drm-misc-next, where it applies cleanly > 2. send a modified patch for drm-misc-fixes, to fix ASAP the master branch The conflict between the modified patch and commit [2] still needs to be addressed in the future, right? Not sure if there is any proper process to address that. I think it's acceptable to wait for a while and apply 3/3 after commit [2] shows up in the master branch, because i.MX8QXP pixel combiner is not added to device tree yet, that is, no one uses it for now. > > Would you send the patch as in item 2, so it can be applied to > drm-misc-fixes and have master fixed ASAP? Note iit should not mention [2] > in the Fixes: tag because [2] is not yet on master. I can send it of course > but you can test on hardware so that would be the best option (and I'm a > bit overloaded at the moment). > > [0] https://drm.pages.freedesktop.org/maintainer-tools/committer/committer-drm-misc.html > [1] commit 99764593528f ("drm/bridge: imx8qxp-pixel-combiner: convert to devm_drm_bridge_alloc() API") > [2] commit ae754f049ce1 ("drm/bridge: imx8qxp-pixel-combiner: get/put the next bridge") > > Luca > > -- > Luca Ceresoli, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com/ -- Regards, Liu Ying