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Mon, 11 May 2020 11:55:41 +0000 From: Rodrigo Siqueira To: Brian Starkey , Liviu Dudau , Daniel Vetter , Simon Ser , Leandro Ribeiro , Helen Koike Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Rodrigo Siqueira Subject: [PATCH V4 1/3] drm/vkms: Decouple crc operations from composer Date: Mon, 11 May 2020 07:55:22 -0400 Message-Id: <20200511115524.22602-2-Rodrigo.Siqueira@amd.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200511115524.22602-1-Rodrigo.Siqueira@amd.com> References: <20200511115524.22602-1-Rodrigo.Siqueira@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: YT1PR01CA0104.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:2c::13) To CY4PR12MB1159.namprd12.prod.outlook.com (2603:10b6:903:36::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from atma2.hitronhub.home (2607:fea8:56a0:11a1::2) by YT1PR01CA0104.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:2c::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2979.28 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: bc632e02-b830-4d65-c79b-08d7f5a23aa7 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2020 11:55:41.5984 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: G2H4ltU6knhKq3J0gZWIKjnMWdf449AUAZQq+nUZPY8gChYAmBlT0C/w1Ey42oKXNfBKAmO05m0Vh5v7LhM54w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1944 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rodrigo Siqueira In the vkms_composer.c, some of the functions related to CRC and compose have interdependence between each other. This patch reworks some functions inside vkms_composer to make crc and composer computation decoupled. This patch is preparation work for making vkms able to support new features. Signed-off-by: Rodrigo Siqueira --- drivers/gpu/drm/vkms/vkms_composer.c | 49 ++++++++++++++++------------ 1 file changed, 29 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index 4af2f19480f4..258e659ecfba 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -108,35 +108,31 @@ static void compose_cursor(struct vkms_composer *cursor_composer, primary_composer, cursor_composer); } -static uint32_t _vkms_get_crc(struct vkms_composer *primary_composer, - struct vkms_composer *cursor_composer) +static int compose_planes(void **vaddr_out, + struct vkms_composer *primary_composer, + struct vkms_composer *cursor_composer) { struct drm_framebuffer *fb = &primary_composer->fb; struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0); struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(gem_obj); - void *vaddr_out = kzalloc(vkms_obj->gem.size, GFP_KERNEL); - u32 crc = 0; - if (!vaddr_out) { - DRM_ERROR("Failed to allocate memory for output frame."); - return 0; + if (!*vaddr_out) { + *vaddr_out = kzalloc(vkms_obj->gem.size, GFP_KERNEL); + if (!*vaddr_out) { + DRM_ERROR("Cannot allocate memory for output frame."); + return -ENOMEM; + } } - if (WARN_ON(!vkms_obj->vaddr)) { - kfree(vaddr_out); - return crc; - } + if (WARN_ON(!vkms_obj->vaddr)) + return -EINVAL; - memcpy(vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size); + memcpy(*vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size); if (cursor_composer) - compose_cursor(cursor_composer, primary_composer, vaddr_out); + compose_cursor(cursor_composer, primary_composer, *vaddr_out); - crc = compute_crc(vaddr_out, primary_composer); - - kfree(vaddr_out); - - return crc; + return 0; } /** @@ -157,9 +153,11 @@ void vkms_composer_worker(struct work_struct *work) struct vkms_output *out = drm_crtc_to_vkms_output(crtc); struct vkms_composer *primary_composer = NULL; struct vkms_composer *cursor_composer = NULL; + void *vaddr_out = NULL; u32 crc32 = 0; u64 frame_start, frame_end; bool crc_pending; + int ret; spin_lock_irq(&out->composer_lock); frame_start = crtc_state->frame_start; @@ -183,14 +181,25 @@ void vkms_composer_worker(struct work_struct *work) if (crtc_state->num_active_planes == 2) cursor_composer = crtc_state->active_planes[1]->composer; - if (primary_composer) - crc32 = _vkms_get_crc(primary_composer, cursor_composer); + if (!primary_composer) + return; + + ret = compose_planes(&vaddr_out, primary_composer, cursor_composer); + if (ret) { + if (ret == -EINVAL) + kfree(vaddr_out); + return; + } + + crc32 = compute_crc(vaddr_out, primary_composer); /* * The worker can fall behind the vblank hrtimer, make sure we catch up. */ while (frame_start <= frame_end) drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32); + + kfree(vaddr_out); } static const char * const pipe_crc_sources[] = {"auto"}; -- 2.26.2