Hi, This is v3 of my series introducing a new connector type: DRM_MODE_CONNECTOR_WRITEBACK See v1 and v2 here: [1] [2] Writeback connectors are used to expose the memory writeback engines found in some display controllers, which can write a CRTC's composition result to a memory buffer. This is useful e.g. for testing, screen-recording, screenshots, wireless display, display cloning, memory-to-memory composition. Writeback connectors are given a WRITEBACK_FB_ID property (which acts slightly differently to FB_ID, so gets a new name), as well as a PIXEL_FORMATS blob to list the supported writeback formats, and OUT_FENCE_PTR to be used for out-fences. The changes since v2 are in the commit messages of each commit. The main differences are: - Subclass drm_connector as drm_writeback_connector - Slight relaxation of core checks, to allow (connector->crtc && !connector->fb) - Dropped PIXEL_FORMATS_SIZE, which was redundant - Reworked the event interface, drivers don't need to deal with the fence directly - Re-ordered the commits to introduce writeback out-fences up-front. I've kept RFC on this series because the event reporting (introduction of drm_writeback_job) is probably up for debate. v4 will be accompanied by igt tests. As always, I look forward to any comments. Thanks, Brian [1] http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1247574.html [2] http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1258017.html --- Brian Starkey (5): drm: Add writeback connector type drm: writeback: Add out-fences for writeback connectors drm: mali-dp: Rename malidp_input_format drm: mali-dp: Add RGB writeback formats for DP550/DP650 drm: mali-dp: Add writeback connector Liviu Dudau (1): drm: mali-dp: Add support for writeback on DP550/DP650 Documentation/gpu/drm-kms.rst | 9 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/arm/Makefile | 1 + drivers/gpu/drm/arm/malidp_crtc.c | 21 +++ drivers/gpu/drm/arm/malidp_drv.c | 25 ++- drivers/gpu/drm/arm/malidp_drv.h | 3 + drivers/gpu/drm/arm/malidp_hw.c | 111 ++++++++---- drivers/gpu/drm/arm/malidp_hw.h | 27 ++- drivers/gpu/drm/arm/malidp_mw.c | 278 ++++++++++++++++++++++++++++++ drivers/gpu/drm/arm/malidp_mw.h | 18 ++ drivers/gpu/drm/arm/malidp_planes.c | 8 +- drivers/gpu/drm/arm/malidp_regs.h | 15 ++ drivers/gpu/drm/drm_atomic.c | 226 +++++++++++++++++++++++- drivers/gpu/drm/drm_atomic_helper.c | 6 + drivers/gpu/drm/drm_connector.c | 4 +- drivers/gpu/drm/drm_writeback.c | 325 +++++++++++++++++++++++++++++++++++ include/drm/drm_atomic.h | 11 ++ include/drm/drm_connector.h | 13 ++ include/drm/drm_mode_config.h | 14 ++ include/drm/drm_writeback.h | 115 +++++++++++++ include/uapi/drm/drm_mode.h | 1 + 21 files changed, 1181 insertions(+), 52 deletions(-) create mode 100644 drivers/gpu/drm/arm/malidp_mw.c create mode 100644 drivers/gpu/drm/arm/malidp_mw.h create mode 100644 drivers/gpu/drm/drm_writeback.c create mode 100644 include/drm/drm_writeback.h -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
