From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932852AbcGEBP3 (ORCPT ); Mon, 4 Jul 2016 21:15:29 -0400 Received: from anholt.net ([50.246.234.109]:43971 "EHLO anholt.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932723AbcGEBOr (ORCPT ); Mon, 4 Jul 2016 21:14:47 -0400 From: Eric Anholt To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Eric Anholt Subject: [PATCH 5/7] drm/vc4: Add a getparam to signal support for branches. Date: Mon, 4 Jul 2016 18:14:38 -0700 Message-Id: <1467681280-20317-6-git-send-email-eric@anholt.net> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1467681280-20317-1-git-send-email-eric@anholt.net> References: <1467681280-20317-1-git-send-email-eric@anholt.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Userspace needs to know if it can create shaders that do branching. Otherwise, for backwards compatibility with old kernels it needs to lower if statements to conditional assignments. Signed-off-by: Eric Anholt --- drivers/gpu/drm/vc4/vc4_drv.c | 3 +++ include/uapi/drm/vc4_drm.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 8a2f2b5a8f32..fd6e34600d50 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -59,6 +59,9 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data, case DRM_VC4_PARAM_V3D_IDENT2: args->value = V3D_READ(V3D_IDENT2); break; + case DRM_VC4_PARAM_SUPPORTS_BRANCHES: + args->value = true; + break; default: DRM_DEBUG("Unknown parameter %d\n", args->param); return -EINVAL; diff --git a/include/uapi/drm/vc4_drm.h b/include/uapi/drm/vc4_drm.h index c4427d31b346..86cc0cd0d125 100644 --- a/include/uapi/drm/vc4_drm.h +++ b/include/uapi/drm/vc4_drm.h @@ -285,6 +285,7 @@ struct drm_vc4_get_hang_state { #define DRM_VC4_PARAM_V3D_IDENT0 0 #define DRM_VC4_PARAM_V3D_IDENT1 1 #define DRM_VC4_PARAM_V3D_IDENT2 2 +#define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3 struct drm_vc4_get_param { __u32 param; -- 2.8.1