[PATCH v4 0/4] Add support for iMX8MQ Display Controller Subsystem

[Laurentiu Palcu]

From: Laurentiu Palcu <laurentiu.palcu at nxp.com>

Hi,

This patchset adds initial DCSS support for iMX8MQ chip. Initial support
includes only graphics plane support (no video planes), no HDR10 capabilities,
no graphics decompression (only linear, tiled and super-tiled buffers allowed).

Support for the rest of the features will be added incrementally, in subsequent
patches.

The patchset was tested with both HDP driver (not yet upstreamed) and MIPI-DSI
(drivers already on the dri-devel ML).

Thanks,
Laurentiu

Changes in v4:
 * Addressed Lucas and Philipp's comments:
   * Added DRM_KMS_CMA_HELPER dependency in Kconfig;
   * Removed usage of devm_ functions since I'm already doing all the
     clean-up in the submodules_deinit();
   * Moved the drm_crtc_arm_vblank_event() in dcss_crtc_atomic_flush();
   * Removed en_completion variable from dcss_crtc since this was
     introduced mainly to avoid vblank timeout warnings which were fixed
     by arming the vblank event in flush() instead of begin();
   * Removed clks_on and irq_enabled flags since all the calls to
     enabling/disabling clocks and interrupts were balanced;
   * Removed the custom atomic_commit callback and used the DRM core
     helper and, in the process, got rid of a workqueue that wasn't
     necessary anymore;
   * Fixed some minor DT binding issues flagged by Philipp;
   * Some other minor changes suggested by Lucas;
 * Removed YUV formats from the supported formats as these cannot work
   without the HDR10 module CSCs and LUTs. Will add them back when I
   will add support for video planes;

Changes in v3:
 * rebased to latest linux-next and made it compile as drmP.h was
   removed;
 * removed the patch adding the VIDEO2_PLL clock. It's already applied;
 * removed an unnecessary 50ms sleep in the dcss_dtg_sync_set();
 * fixed a a spurious hang reported by Lukas Hartmann and encountered
   by me several times;
 * mask DPR and DTG interrupts by default, as they may come enabled from
   U-boot;

Changes in v2:
 * Removed '0x' in node's unit-address both in DT and yaml;
 * Made the address region size lowercase, to be consistent;
 * Removed some left-over references to P010;
 * Added a Kconfig dependency of DRM && ARCH_MXC. This will also silence compilation
   issues reported by kbuild for other architectures;


Laurentiu Palcu (4):
  drm/imx: compile imx directory by default
  drm/imx: Add initial support for DCSS on iMX8MQ
  dt-bindings: display: imx: add bindings for DCSS
  arm64: dts: imx8mq: add DCSS node

 .../bindings/display/imx/nxp,imx8mq-dcss.yaml |  85 ++
 arch/arm64/boot/dts/freescale/imx8mq.dtsi     |  23 +
 drivers/gpu/drm/Makefile                      |   2 +-
 drivers/gpu/drm/imx/Kconfig                   |   2 +
 drivers/gpu/drm/imx/Makefile                  |   1 +
 drivers/gpu/drm/imx/dcss/Kconfig              |   9 +
 drivers/gpu/drm/imx/dcss/Makefile             |   6 +
 drivers/gpu/drm/imx/dcss/dcss-blkctl.c        |  73 ++
 drivers/gpu/drm/imx/dcss/dcss-crtc.c          | 206 +++++
 drivers/gpu/drm/imx/dcss/dcss-ctxld.c         | 431 +++++++++
 drivers/gpu/drm/imx/dcss/dcss-dev.c           | 277 ++++++
 drivers/gpu/drm/imx/dcss/dcss-dev.h           | 172 ++++
 drivers/gpu/drm/imx/dcss/dcss-dpr.c           | 562 ++++++++++++
 drivers/gpu/drm/imx/dcss/dcss-drv.c           | 183 ++++
 drivers/gpu/drm/imx/dcss/dcss-dtg.c           | 413 +++++++++
 drivers/gpu/drm/imx/dcss/dcss-kms.c           | 188 ++++
 drivers/gpu/drm/imx/dcss/dcss-kms.h           |  43 +
 drivers/gpu/drm/imx/dcss/dcss-plane.c         | 405 +++++++++
 drivers/gpu/drm/imx/dcss/dcss-scaler.c        | 826 ++++++++++++++++++
 drivers/gpu/drm/imx/dcss/dcss-ss.c            | 180 ++++
 20 files changed, 4086 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/display/imx/nxp,imx8mq-dcss.yaml
 create mode 100644 drivers/gpu/drm/imx/dcss/Kconfig
 create mode 100644 drivers/gpu/drm/imx/dcss/Makefile
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-blkctl.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-crtc.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-ctxld.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dev.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dev.h
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dpr.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-drv.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dtg.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-kms.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-kms.h
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-plane.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-scaler.c
 create mode 100644 drivers/gpu/drm/imx/dcss/dcss-ss.c

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2.17.1