[libdrm] Add support for DRM_MODE_PAGE_FLIP_TARGET_* flags
diff mbox

Message ID 20161012094159.24842-1-michel@daenzer.net
State New
Headers show

Commit Message

Michel Dänzer Oct. 12, 2016, 9:41 a.m. UTC
From: Michel Dänzer <michel.daenzer@amd.com>

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
---

The corresponding kernel changes have landed in Linus' tree.

 include/drm/drm.h      |  1 +
 include/drm/drm_mode.h | 39 ++++++++++++++++++++++++++++++++++++---
 xf86drmMode.c          | 16 ++++++++++++++++
 xf86drmMode.h          |  3 +++
 4 files changed, 56 insertions(+), 3 deletions(-)

Comments

Emil Velikov Oct. 12, 2016, 3:54 p.m. UTC | #1
Hi Michel,

On 12 October 2016 at 10:41, Michel Dänzer <michel@daenzer.net> wrote:
> From: Michel Dänzer <michel.daenzer@amd.com>
>
> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
> ---
>
> The corresponding kernel changes have landed in Linus' tree.
>
>  include/drm/drm.h      |  1 +
>  include/drm/drm_mode.h | 39 ++++++++++++++++++++++++++++++++++++---
For these two (patch 1/2) please follow the pre-existing pattern (git
log -- include/drm/), barring the top commit of course ;-) Namely: use
make headers_install & reference the tree/sha that files are based on.

If you can skim through & handle radeon/amdgpu_drm.h that'll be
greatly appreciated.

>  xf86drmMode.c          | 16 ++++++++++++++++
>  xf86drmMode.h          |  3 +++
And here (patch 2/2) please mention some of the users.

Thanks
Emil
Michel Dänzer Oct. 13, 2016, 8:07 a.m. UTC | #2
On 13/10/16 12:54 AM, Emil Velikov wrote:
> Hi Michel,
> 
> On 12 October 2016 at 10:41, Michel Dänzer <michel@daenzer.net> wrote:
>> From: Michel Dänzer <michel.daenzer@amd.com>
>>
>> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
>> ---
>>
>> The corresponding kernel changes have landed in Linus' tree.
>>
>>  include/drm/drm.h      |  1 +
>>  include/drm/drm_mode.h | 39 ++++++++++++++++++++++++++++++++++++---
> For these two (patch 1/2) please follow the pre-existing pattern (git
> log -- include/drm/), barring the top commit of course ;-) Namely: use
> make headers_install & reference the tree/sha that files are based on.
> 
> If you can skim through & handle radeon/amdgpu_drm.h that'll be
> greatly appreciated.

I'm leaving that to somebody who needs those to be synced. E.g. Marek
might already have patches ready for amdgpu SI support.

Other than that, the v2 series should address your comments, thanks.

Patch
diff mbox

diff --git a/include/drm/drm.h b/include/drm/drm.h
index b4ebaa9..3c5181d 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -636,6 +636,7 @@  struct drm_gem_open {
 #define DRM_CAP_CURSOR_WIDTH		0x8
 #define DRM_CAP_CURSOR_HEIGHT		0x9
 #define DRM_CAP_ADDFB2_MODIFIERS	0x10
+#define DRM_CAP_PAGE_FLIP_TARGET	0x11
 
 /** DRM_IOCTL_GET_CAP ioctl argument type */
 struct drm_get_cap {
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index 7a7856e..e15a74d 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -514,7 +514,13 @@  struct drm_color_lut {
 
 #define DRM_MODE_PAGE_FLIP_EVENT 0x01
 #define DRM_MODE_PAGE_FLIP_ASYNC 0x02
-#define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT|DRM_MODE_PAGE_FLIP_ASYNC)
+#define DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
+#define DRM_MODE_PAGE_FLIP_TARGET_RELATIVE 0x8
+#define DRM_MODE_PAGE_FLIP_TARGET (DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE | \
+				   DRM_MODE_PAGE_FLIP_TARGET_RELATIVE)
+#define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT | \
+				  DRM_MODE_PAGE_FLIP_ASYNC | \
+				  DRM_MODE_PAGE_FLIP_TARGET)
 
 /*
  * Request a page flip on the specified crtc.
@@ -537,8 +543,7 @@  struct drm_color_lut {
  * 'as soon as possible', meaning that it not delay waiting for vblank.
  * This may cause tearing on the screen.
  *
- * The reserved field must be zero until we figure out something
- * clever to use it for.
+ * The reserved field must be zero.
  */
 
 struct drm_mode_crtc_page_flip {
@@ -549,6 +554,34 @@  struct drm_mode_crtc_page_flip {
 	__u64 user_data;
 };
 
+/*
+ * Request a page flip on the specified crtc.
+ *
+ * Same as struct drm_mode_crtc_page_flip, but supports new flags and
+ * re-purposes the reserved field:
+ *
+ * The sequence field must be zero unless either of the
+ * DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags is specified. When
+ * the ABSOLUTE flag is specified, the sequence field denotes the absolute
+ * vblank sequence when the flip should take effect. When the RELATIVE
+ * flag is specified, the sequence field denotes the relative (to the
+ * current one when the ioctl is called) vblank sequence when the flip
+ * should take effect. NOTE: DRM_IOCTL_WAIT_VBLANK must still be used to
+ * make sure the vblank sequence before the target one has passed before
+ * calling this ioctl. The purpose of the
+ * DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags is merely to clarify
+ * the target for when code dealing with a page flip runs during a
+ * vertical blank period.
+ */
+
+struct drm_mode_crtc_page_flip_target {
+	__u32 crtc_id;
+	__u32 fb_id;
+	__u32 flags;
+	__u32 sequence;
+	__u64 user_data;
+};
+
 /* create a dumb scanout buffer */
 struct drm_mode_create_dumb {
 	__u32 height;
diff --git a/xf86drmMode.c b/xf86drmMode.c
index 228c6e4..fb22f68 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -948,6 +948,22 @@  int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
 }
 
+int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
+			  uint32_t flags, void *user_data,
+			  uint32_t target_vblank)
+{
+	struct drm_mode_crtc_page_flip_target flip_target;
+
+	memclear(flip_target);
+	flip_target.fb_id = fb_id;
+	flip_target.crtc_id = crtc_id;
+	flip_target.user_data = VOID2U64(user_data);
+	flip_target.flags = flags;
+	flip_target.sequence = target_vblank;
+
+	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip_target);
+}
+
 int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 		    uint32_t fb_id, uint32_t flags,
 		    int32_t crtc_x, int32_t crtc_y,
diff --git a/xf86drmMode.h b/xf86drmMode.h
index 1a02fed..b684967 100644
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -473,6 +473,9 @@  extern int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
 			       uint16_t *red, uint16_t *green, uint16_t *blue);
 extern int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 			   uint32_t flags, void *user_data);
+extern int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
+				 uint32_t flags, void *user_data,
+				 uint32_t target_vblank);
 
 extern drmModePlaneResPtr drmModeGetPlaneResources(int fd);
 extern drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id);