Hi Inki,
GSCALERs in Exynos SoCs support conversion between wide range of image formats, plus scaling and rotation. Driver already supports mem2mem mode - via ExynosDRM IPP framework. This patchset adds support for mem to display mode - framebuffers can be converted, scaled and send directly to Display Controller. From DRM framework's point of view every GSCALER exposes drm_plane which can be connected to display controller (display panel or TV). The feature is not well documented so the development was quite difficult - a process of trial and error, vendor code analysis, guessing from datasheets. Hopefully most of the issues were solved. I have developed and tested it on TM2 device with panel and TV paths.
The patchset contains three parts: 1. Preparatory patches - mostly cleanup and refactoring of drm_crtc and drm_plane related structures, to allow usage of planes which are not physically bound to crtcs (01-13). 2. Adding local path support to GSCALER and DECON (14-20). 3. Few fixes of bugs existing already in the code but discovered due to added local path support (21-23).
The patchset is based on exynos_drm_next plus my patchset adding zpos to DECON and FIMD - 'drm/exynos: add support for dynamic zpos in DECON and FIMD' - it is required to allow set z-pos position of GSCALER planes. To simplify tests I have also created branch containing all required patches: Repo: https://git.tizen.org/cgit/platform/kernel/linux-exynos Branch: sandbox/ahajda/dev/exynos-drm-local-path
Regards Andrzej
Andrzej Hajda (23): drm/exynos: remove exynos_drm_plane.h header drm/exynos: remove spare macro drm/exynos: drop exynos_drm_plane_config structure drm/exynos: add exynos_drm_crtc_init function drm/exynos/decon5433: embed exynos_drm_crtc directly into context drm/exynos/decon7: embed exynos_drm_crtc directly into context drm/exynos/fimd: embed exynos_drm_crtc directly into context drm/exynos/mixer: embed exynos_drm_crtc directly into context drm/exynos/vidi: embed exynos_drm_crtc directly into context drm/exynos: remove standalone exynos_drm_crtc leftovers drm/exynos/vidi: remove encoder_to_vidi helper drm/exynos: unify plane type assignment drm/exynos: set primary and cursor planes in exynos_drm_crtc_init drm/exynos: add plane update/disable callbacks for planes drm/exynos: add GSCALER plane capability drm/exynos/gscaler: fix id assignement arm64: dts: exynos: configure GSCALER related clocks arm64: dts: exynos: add DSD/GSD clocks to DECONs and GSCALERs drm/exynos/gscaler: add local path support drm/exynos/decon5433: add local path support drm/exynos/decon5433: wait for finish previous update drm/exynos/gscaler: change supported color format BGRX8888 to XBGR8888 drm/exynos/gscaler: fix handling YVU420 pixel format
.../dts/exynos/exynos5433-tm2-common.dtsi | 6 + arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 6 +- arch/arm64/boot/dts/exynos/exynos5433.dtsi | 25 +- drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 162 ++++++++----- drivers/gpu/drm/exynos/exynos7_drm_decon.c | 66 +++-- drivers/gpu/drm/exynos/exynos_drm_crtc.c | 46 ++-- drivers/gpu/drm/exynos/exynos_drm_crtc.h | 7 +- drivers/gpu/drm/exynos/exynos_drm_drv.c | 1 - drivers/gpu/drm/exynos/exynos_drm_drv.h | 50 ++-- drivers/gpu/drm/exynos/exynos_drm_fimd.c | 85 +++---- drivers/gpu/drm/exynos/exynos_drm_gsc.c | 229 ++++++++++++++---- drivers/gpu/drm/exynos/exynos_drm_plane.c | 84 ++++--- drivers/gpu/drm/exynos/exynos_drm_plane.h | 14 -- drivers/gpu/drm/exynos/exynos_drm_vidi.c | 48 ++-- drivers/gpu/drm/exynos/exynos_mixer.c | 95 +++----- drivers/gpu/drm/exynos/regs-decon5433.h | 6 + drivers/gpu/drm/exynos/regs-gsc.h | 6 + 17 files changed, 529 insertions(+), 407 deletions(-) delete mode 100644 drivers/gpu/drm/exynos/exynos_drm_plane.h