From nobody Fri Sep 25 20:04:34 2026 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) (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 1ADFB248F57 for ; Wed, 9 Sep 2026 02:11:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788919880; cv=none; b=fuK8VVEBNUBg8hdVuoUhZLqpUO7kEB1wMwY+yQPCRhbnoSIZuLrAzG9CmzwvKkIBDJ8CRX+jc7zcUGUqZ2Yfdr0d8FIMnaKJz/HHBP4hhXTgDyMICfEvYcODsnLch5pUiPxDzbrt+fig4fuKQNCIM4Ceh9cNlvjFnpgvopns71M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788919880; c=relaxed/simple; bh=vZZBoI02iPiSHJmdqbuanzefxahE3w5bjLgFkDSk7P0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=drYWlFwYKold5uDmPE8KDW4HXmwEw1/WM6TdqgoZvS4n8lL3DlgKuNDN/S/veumjFYrJ5iRjY8UP5s6kFKam39DgCa8+H+rRTLrH5KuPzC9OJEBqG8aJ3aKpmxXm3wWasgdNW2Ea2Y9c8PEjxComblnmIWwfkDH0UMICqI1/gmg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=H9ZhZ2yY; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="H9ZhZ2yY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=so NLpp8eGs4CZ9R16t/lHqu4wFlI7zdkA2NCGVlyDoQ=; b=H9ZhZ2yYquxaikibZW l7SB4ZC0KwuqTOy+W+OO8YRQE40utfEn+AngdAkrkjLzfEa/huivjknuT/w9R6Sp Qkc+3GPPw0dnNPq2vrikgINXFEVenLDyT72rUAm7vOuPPB57NBG79BXX8U5DcmEr xavhtMIgSco9+Xan/aooLxcGg= Received: from localhost.localdomain (unknown []) by gzsmtp2 (Coremail) with SMTP id PSgvCgD3HwsWwKBqAGE5PQ--.31004S2; Wed, 09 Sep 2026 10:10:30 +0800 (CST) From: oushixiong1025@163.com To: Louis Chauvet Cc: Haneen Mohammed , Simona Vetter , Melissa Wen , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Leandro Ribeiro , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Shixiong Ou Subject: [PATCH] drm/vkms: Skip pre_blend_color_transform when pipeline is all bypassed Date: Wed, 9 Sep 2026 10:10:28 +0800 Message-Id: <20260909021028.105837-1-oushixiong1025@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: PSgvCgD3HwsWwKBqAGE5PQ--.31004S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7WFyUAF17WrWrGF47Gry5XFb_yoW8AF45pF srJryYgF4UXrW8X343JrZ3u3yagwnYqayI9r9xG3sIvFn0y3sagas8Gry7ArW5JrWxuFyI gFs8Ar9rtw10kw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jnzVbUUUUU= X-CM-SenderInfo: xrxvxxx0lr0wirqskqqrwthudrp/xtbC4Rb3B2qgwBalSQAA33 Content-Type: text/plain; charset="utf-8" From: Shixiong Ou pre_blend_color_transform() traverses the colorop pipeline and unpacks each pixel into s32 for every line, even when all colorops are bypassed or the pipeline is empty. Add a line-level check to skip the entire function in that case, avoiding per-pixel overhead. Signed-off-by: Shixiong Ou --- drivers/gpu/drm/vkms/vkms_composer.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vk= ms_composer.c index f3fb203946e8..1806c249da6f 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -190,13 +190,29 @@ static void apply_colorop(struct pixel_argb_s32 *pixe= l, struct drm_colorop *colo } } =20 +static bool pipeline_all_bypassed(struct drm_colorop *colorop) +{ + while (colorop) { + struct drm_colorop_state *colorop_state =3D colorop->state; + + if (!colorop_state || !colorop_state->bypass) + return false; + colorop =3D colorop->next; + } + return true; +} + static void pre_blend_color_transform(const struct vkms_plane_state *plane= _state, struct line_buffer *output_buffer) { + struct drm_colorop *colorop =3D plane_state->base.base.color_pipeline; struct pixel_argb_s32 pixel; =20 + if (!colorop || pipeline_all_bypassed(colorop)) + return; + for (size_t x =3D 0; x < output_buffer->n_pixels; x++) { - struct drm_colorop *colorop =3D plane_state->base.base.color_pipeline; + colorop =3D plane_state->base.base.color_pipeline; =20 /* * Some operations, such as applying a BT709 encoding matrix, --=20 2.25.1 No virus found Checked by Hillstone Network AntiVirus