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Thu, 10 Sep 2026 12:25:16 -0700 (PDT) From: Roshan Kumar To: linusw@kernel.org, dri-devel@lists.freedesktop.org Cc: leandro.ribeiro@collabora.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, pimyn@google.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/pl111: Advertise no pixel blending Date: Thu, 10 Sep 2026 19:25:11 -0000 Message-ID: <178906831180.136984.3208749717777263252@gmail.com> In-Reply-To: <20260825105427.686619-1-roshaen09@gmail.com> References: <20260825105427.686619-1-roshaen09@gmail.com> <20260825105427.686619-1-roshaen09@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 No physical PL111 hardware here; I tested under QEMU vexpress with panic_on_warn, which is also how the syzkaller instance hits this. On current master (7.3-rc2) the unpatched driver registers and immediately warns: "[PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup", which kills the boot with panic_on_warn. With v3 below, the same boot registers pl111 with no warnings at all. One note: 860e748bddcc is not in v7.2, so the splat only shows up on master/7.3 and later. v3 also removes the alpha formats from the board-specific tables in pl111_versatile.c that the sashiko review caught v2 missing.