Hi, This is a respin of the previous serie called "Support fast framebuffer panning for i.MX6" made by Stefan 6 monthes ago. The imx6 bits have been removed, and the comments that were made at that time fixed (hopefully). Let me know what you think, Maxime Changes from v1: - Added drm_fb_helper_ioctl to DRM_FB_HELPER_DEFAULT_OPS - Expanded a bit the kerneldoc for drm_fb_helper_ioctl - Added some locking to drm_fb_helper_ioctl - Checked that the framebuffer is indeed attached before allowing ioctl - Added a module parameter to specify the number of framebuffers to allocate Initial cover letter: Support fast framebuffer panning for i.MX6 im currently working on supporting double/tripple buffering for the framebuffer emulation on the i.MX6. While working on it I noticed that the mainline kernel does not support some features in the generic drm framebuffer emulation for framebuffer panning and vsync synchronisation. They are needed for simple framebuffer applications and some OpenGL libraries using double buffering with FBIOPUT_VSCREENINFO, FBIO_WAITFORVSYNC and FBIOPAN_DISPLAY. Stefan Christ (1): drm/fb_helper: implement ioctl FBIO_WAITFORVSYNC Xinliang Liu (1): drm/cma-helper: Add multi buffer support for cma fbdev drivers/gpu/drm/Kconfig | 8 ++++- drivers/gpu/drm/drm_fb_cma_helper.c | 8 +++- drivers/gpu/drm/drm_fb_helper.c | 55 ++++++++++++++++++++++++++++++- include/drm/drm_fb_helper.h | 5 ++- 4 files changed, 74 insertions(+), 2 deletions(-) base-commit: 8b394ae674998d4ade6cb48aec3fca5445908dfe -- git-series 0.8.11 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel