From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 B575A3822AB for ; Mon, 18 May 2026 17:55:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779126907; cv=none; b=eMsNyErPFJ394CSeyJniplslu9gzR/I6/TpmmF9x5UJEEbOOJgQhXTzaNiMnp8HjgnESytcMqec8Rxsb7SBNSPsWVtxA0cwEK0eV2FisB3jH3bjmHuCEh/pD4hZe4D/Qd+cU3fA/gZAQut0X5Dqezng0WSZuJ2Q0IwvfeO/rgFo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779126907; c=relaxed/simple; bh=BpDz6FJ1VwY+vrpUbgW76LYygd+6fRBU6WVkze/iKOI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lpUMNIW/xPQZTjnyIVYNlROMUT356CN0bRx4ggbmD6wjeSQxdthQ/S3wRZGUCSowwOL9lYqMWKRYzOnnH9mT+PVPfpvXUNfQb63zbBptVvu0rLMkp73tDG1EB5WYCfD0kFLSDs9b0oinFvxeufFrlYVPDqvMD7tUGcu8BsX2NmY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=HrBLMkR9; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="HrBLMkR9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1779126903; bh=BpDz6FJ1VwY+vrpUbgW76LYygd+6fRBU6WVkze/iKOI=; h=From:To:Cc:Subject:Date:From; b=HrBLMkR97p/bIIWyL//tp84JIydq6HfAJ/73m7NpWucRB4zolccz40VLvWSNQxOG3 qZrgQLHX6eU9KvS/kGYGG+0rr3MNSzEs5DA/i30VFKPO9nvVu4qx1ljXBVsyJkHpcj kDWNMmZrEoUwIPFO9toCQ8e5Fp3W+7CzXxEjjXHEQX6VOrJQaCSAq4/tQ8Ld4JIBFd e5FG4FNyZ4yD9YNWPqjG2JCdKIReWCvJuqrB2fO96ljmxs5g2DIxTG1t+1CZ66fJ/D 8KJx0k3K2hNyVbuq5jOKZaZqo7px240VFNkg3sBXg4/U04Wv4S1QLHeB/hI+78LhXZ fEUa38AJnqKzg== Received: from archlinux (unknown [100.64.1.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: leandrohrb) by bali.collaboradmins.com (Postfix) with ESMTPSA id 2B2A217E05E5; Mon, 18 May 2026 19:54:59 +0200 (CEST) From: Leandro Ribeiro To: dri-devel@lists.freedesktop.org Cc: airlied@gmail.com, daniels@collabora.com, jani.nikula@linux.intel.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, pekka.paalanen@collabora.com, simona@ffwll.ch, tzimmermann@suse.de, ville.syrjala@linux.intel.com, linux-kernel@vger.kernel.org Subject: [PATCH v3 0/2] drm/drm_blend: allow blend mode property without PREMULTI Date: Mon, 18 May 2026 14:54:27 -0300 Message-ID: <20260518175429.80615-1-leandro.ribeiro@collabora.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some hardware only supports the COVERAGE blend mode and lacks PREMULTI support entirely. DRM currently requires that PREMULTI is present when creating a blend mode property, which prevents such drivers from being properly upstreamed. This series removes this restriction and allows drivers to create a blend mode property without PREMULTI. On Weston (userspace), we are working [1] towards adding support for this kind of hardware. [1] https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/2046 v3: - Changed where we enforce drivers to expose blend mode for planes that support the alpha property or pixel formats with alpha. - Fixed missing check to forbid calling drm_plane_create_blend_mode_property() with a zero bitmask of supported modes. v2: - Force drivers to expose blend mode if plane supports alpha property or pixel format with alpha. Leandro Ribeiro (2): drm/drm_blend: allow blend mode property without PREMULTI drm: ensure blend mode supported if alpha exposed drivers/gpu/drm/drm_blend.c | 20 +++++++++++----- drivers/gpu/drm/drm_crtc_internal.h | 2 +- drivers/gpu/drm/drm_drv.c | 7 ++++-- drivers/gpu/drm/drm_mode_config.c | 37 +++++++++++++++++++++++++++-- 4 files changed, 55 insertions(+), 11 deletions(-) -- 2.54.0