drm/tidss: New driver for TI Keystone platform Display SubSystem

This is intended to be the last patch series. I'll apply these trough drm-misc-next tomorrow.

Changes since v8:
- "dt-bindings: display: ti,k2g-dss: Add dt-schema yaml binding"
- Remove ports-node from the dts example in
- "drm/tidss: New driver for TI Keystone platform Display SubSystem"
- Rename dispc_write_irqenable() to dispc_set_irqenable() to avoid conflict exported omapfb function with same name.
- Add Signed-off-by: Tomi Valkeinen <[email protected]>
- "MAINTAINERS: add entry for tidss"
- Add Signed-off-by: Tomi Valkeinen <[email protected]>

Changes since v7:
- "drm/tidss: New driver for TI Keystone platform Display SubSystem"
- Remove idle debug prints from dispc_init()
- Add Reviewed-by: Benoit Parrot <[email protected]>
- "MAINTAINERS: add entry for tidss"
- Add Reviewed-by: Benoit Parrot <[email protected]>

Changes since v6:
- Rebase on top of drm-misc-next-2020-01-10
- Fix all checkpatch.pl -q --emacs --strict --show-types issues
- all issues but these have been fixed:
- over 80 char lines in scale coefficients found in tidss_scale_coefs.c
- Co-developed-by and Signed-off-by: name/email do not match
- added, moved or deleted file(s), does MAINTAINERS need updating
- Add Acked-by: Sam Ravnborg <[email protected]> to "drm/tidss: New driver ..."

Changes since v5:
- Add Add Reviewed-by: from Rob Herring <[email protected]> and Benoit Parrot <[email protected]> to binding patches
- Color property changes and fixes to the driver implementation patch
- Check CTM and gamma support from dispc_features when creating crtc
- Implement CTM support for k2g and fix k3 CTM implementation
- Remove gamma property persistence and always write color properties in a new modeset

Changes since v4:
- itemize named resource property descriptions in dt binding
- fix wp to wb in the ti,j721e-dss reg property description
- remove fifo underflow irq handling, it is not an error and it should be used for debug purposes only
- memory tuning, prefetch plane fifo up to high-threshold value to minimize possibility of underflows.

Changes since v3:
- Add descriptions some yaml binding properites
- Remove redundant minItems directives from yaml bindings
- Remove ports node from ti,k2g-dss yaml binding
- no change to MAINTAINERS or to the driver code

Changes since v2:
- Add version history to commit messages
- Fix yaml bindings now that got dt_binding_check dtbs_check working property
- Move tidss entry in MAINTAINERS after omapdrm and add "T: git
git://anongit.freedesktop.org/drm/drm-misc"
- no change to driver code

Changes since the first version of the patch series [2]:
- "drm/tidss: New driver for TI Keystone platform Display SubSystem"
- rebased on top of drm-next-2019-11-27
- sort all include lines in all files
- remove all include <drm/drmP.h>
- remove select "select VIDEOMODE_HELPERS"
- call dispc_vp_setup() later in tidss_crtc_atomic_flush() (there is no to call it in new modeset case as it is also called in vp_enable())
- change probe sequence and drm_device allocation (follow example in drm_drv.c)
- use __maybe_unused instead of #ifdef for pm functions
- remove "struct drm_fbdev_cma *fbdev;" from driver data
- check panel connector type before connecting it
- No change to binding or MAINTAINERS patches

There was couple of attempts upstream an earlier version of this driver about a year ago [1]. Back then I needed to stop my efforts to implement support for next Keystone DSS version, so now the driver supports three different Keystone DSS version on three different SoCs.

I am starting the patch series versioning from the beginning because it has been over a year since the previous patch set and the structure of the driver has evolved quite a bit. However, all the earlier comments should be addressed in this series.

[1] https://patchwork.freedesktop.org/series/44947/
[2] https://lists.freedesktop.org/archives/dri-devel/2019-November/246542.html

Jyri Sarha (5):
dt-bindings: display: ti,k2g-dss: Add dt-schema yaml binding
dt-bindings: display: ti,am65x-dss: Add dt-schema yaml binding
dt-bindings: display: ti,j721e-dss: Add dt-schema yaml binding drm/tidss: New driver for TI Keystone platform Display SubSystem
MAINTAINERS: add entry for tidss

 .../bindings/display/ti/ti,am65x-dss.yaml     |  152 +
 .../bindings/display/ti/ti,j721e-dss.yaml     |  208 ++
 .../bindings/display/ti/ti,k2g-dss.yaml       |  106 +
 MAINTAINERS                                   |   11 +
 drivers/gpu/drm/Kconfig                       |    2 +
 drivers/gpu/drm/Makefile                      |    1 +
 drivers/gpu/drm/tidss/Kconfig                 |   14 +
 drivers/gpu/drm/tidss/Makefile                |   12 +
 drivers/gpu/drm/tidss/tidss_crtc.c            |  377 +++
 drivers/gpu/drm/tidss/tidss_crtc.h            |   46 +
 drivers/gpu/drm/tidss/tidss_dispc.c           | 2768 +++++++++++++++++
 drivers/gpu/drm/tidss/tidss_dispc.h           |  132 +
 drivers/gpu/drm/tidss/tidss_dispc_regs.h      |  243 ++
 drivers/gpu/drm/tidss/tidss_drv.c             |  285 ++
 drivers/gpu/drm/tidss/tidss_drv.h             |   39 +
 drivers/gpu/drm/tidss/tidss_encoder.c         |   88 +
 drivers/gpu/drm/tidss/tidss_encoder.h         |   17 +
 drivers/gpu/drm/tidss/tidss_irq.c             |  146 +
 drivers/gpu/drm/tidss/tidss_irq.h             |   77 +
 drivers/gpu/drm/tidss/tidss_kms.c             |  249 ++
 drivers/gpu/drm/tidss/tidss_kms.h             |   15 +
 drivers/gpu/drm/tidss/tidss_plane.c           |  217 ++
 drivers/gpu/drm/tidss/tidss_plane.h           |   25 +
 drivers/gpu/drm/tidss/tidss_scale_coefs.c     |  202 ++
 drivers/gpu/drm/tidss/tidss_scale_coefs.h     |   22 +
 25 files changed, 5454 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
 create mode 100644 Documentation/devicetree/bindings/display/ti/ti,j721e-dss.yaml
 create mode 100644 Documentation/devicetree/bindings/display/ti/ti,k2g-dss.yaml
 create mode 100644 drivers/gpu/drm/tidss/Kconfig
 create mode 100644 drivers/gpu/drm/tidss/Makefile
 create mode 100644 drivers/gpu/drm/tidss/tidss_crtc.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_crtc.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_dispc.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_dispc.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_dispc_regs.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_drv.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_drv.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_encoder.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_encoder.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_irq.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_irq.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_kms.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_kms.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_plane.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_plane.h
 create mode 100644 drivers/gpu/drm/tidss/tidss_scale_coefs.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_scale_coefs.h

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