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Tue, 4 Nov 2025 10:24:26 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 30128606EF; Tue, 4 Nov 2025 10:24:26 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id F3E03102F1CE8; Tue, 4 Nov 2025 11:24:17 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1762251864; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references:autocrypt; bh=Yh/SOsjRqtgPLuq8QRVnn/lrGryn5Z5zYSTW9+Wd1lE=; b=uwu7EiHCDvkOi+ZlaNqDmWa7sDjt1+KNUXllXXwIo7BBazhl8rSoPx6BVnpH9z+jfnu3AN M704y1JCBh8jUjN0L1cESmxgAsuL/HG1dpnA8pkxVWp+V+NUYpIsRVSEdL1KPdP6GhPMtM NMZcL50+dzYfv1YP7uz27gLG9O83Kv4TwoM5Vz1q/0Sgwyl5sDhiNrZVhWiFwVL0miKigv QCIJ805towdU/JbBzlnj80L6OK/kU++DuYG/iG4h/SXHDnQjUn8N2K6QbLxM9f6YFvJw65 6/5Bic3PvCFetE3+rKQiGGPaLwxTnrpCFS0pnzFfB44qrYnmLbrU8KLeS4N4vg== Message-ID: Date: Tue, 4 Nov 2025 11:24:17 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/7] drm: writeback: Refactor drm_writeback_connector structure To: Suraj Kandpal , linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kernel-list@raspberrypi.com, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Cc: dmitry.baryshkov@oss.qualcomm.com, ankit.k.nautiyal@intel.com, arun.r.murthy@intel.com, uma.shankar@intel.com, jani.nikula@intel.com, harry.wentland@amd.com, siqueira@igalia.com, alexander.deucher@amd.com, christian.koenig@amd.com, airlied@gmail.com, simona@ffwll.ch, liviu.dudau@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, robin.clark@oss.qualcomm.com, abhinav.kumar@linux.dev, tzimmermann@suse.de, jessica.zhang@oss.qualcomm.com, sean@poorly.run, marijn.suijten@somainline.org, laurent.pinchart+renesas@ideasonboard.com, mcanal@igalia.com, dave.stevenson@raspberrypi.com, tomi.valkeinen+renesas@ideasonboard.com, kieran.bingham+renesas@ideasonboard.com References: <20251007054528.2900905-1-suraj.kandpal@intel.com> <20251007054528.2900905-2-suraj.kandpal@intel.com> Content-Language: en-US, fr From: Louis Chauvet Autocrypt: addr=louis.chauvet@bootlin.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Le 07/10/2025 à 07:45, Suraj Kandpal a écrit : > Some drivers cannot work with the current design where the connector > is embedded within the drm_writeback_connector such as Intel and > some drivers that can get it working end up adding a lot of checks > all around the code to check if it's a writeback conenctor or not, > this is due to the limitation of inheritance in C. > To solve this move the drm_writeback_connector within the > drm_connector and remove the drm_connector base which was in > drm_writeback_connector. Make this drm_writeback_connector > a union with hdmi connector to save memory and since a connector can > never be both writeback and hdmi it should serve us well. > Do all other required modifications that come with these changes > along with addition of new function which returns the drm_connector > when drm_writeback_connector is present. > Modify drivers using the drm_writeback_connector to > allow them to use this connector without breaking them. > The drivers modified here are amd, komeda, mali, vc4, vkms, > rcar_du, msm > > Signed-off-by: Suraj Kandpal > --- > V1 -> V2: Use &connector->writeback, make commit message imperative (Dmitry) > --- [...] > drivers/gpu/drm/vkms/vkms_composer.c | 2 +- > drivers/gpu/drm/vkms/vkms_drv.h | 2 +- > drivers/gpu/drm/vkms/vkms_writeback.c | 13 ++-- For the VKMS part: Reviewed-by: Louis Chauvet Thanks, Louis Chauvet -- Louis Chauvet, Bootlin Embedded Linux and Kernel engineering https://bootlin.com