From 38f2149c7e97f379210c658c21124d547e7b503a Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Tue, 30 Aug 2022 17:29:43 +0000 Subject: drm: introduce DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This new kernel capability indicates whether async page-flips are supported via the atomic uAPI. DRM clients can use it to check for support before feeding DRM_MODE_PAGE_FLIP_ASYNC to the kernel. Make it clear that DRM_CAP_ASYNC_PAGE_FLIP is for legacy uAPI only. Signed-off-by: Simon Ser Cc: Daniel Vetter Cc: Joshua Ashton Cc: Melissa Wen Cc: Alex Deucher Cc: Harry Wentland Cc: Nicholas Kazlauskas Cc: André Almeida Cc: Ville Syrjälä Signed-off-by: Cristian Ciocaltea Link: https://lore.kernel.org/r/20220830172851.269402-6-contact@emersion.fr --- drivers/gpu/drm/drm_ioctl.c | 5 +++++ include/uapi/drm/drm.h | 10 +++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index ca2a6e6101dc..5b1591e2b46c 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -302,6 +302,11 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ case DRM_CAP_CRTC_IN_VBLANK_EVENT: req->value = 1; break; + case DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP: + req->value = drm_core_check_feature(dev, DRIVER_ATOMIC) && + dev->mode_config.async_page_flip && + !dev->mode_config.atomic_async_page_flip_not_supported; + break; default: return -EINVAL; } diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 642808520d92..b1962628ecda 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -706,7 +706,8 @@ struct drm_gem_open { /** * DRM_CAP_ASYNC_PAGE_FLIP * - * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC. + * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC for legacy + * page-flips. */ #define DRM_CAP_ASYNC_PAGE_FLIP 0x7 /** @@ -767,6 +768,13 @@ struct drm_gem_open { * Documentation/gpu/drm-mm.rst, section "DRM Sync Objects". */ #define DRM_CAP_SYNCOBJ_TIMELINE 0x14 +/** + * DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP + * + * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC for atomic + * commits. + */ +#define DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP 0x15 /* DRM_IOCTL_GET_CAP ioctl argument type */ struct drm_get_cap { -- cgit 1.4.1