[PATCH v5 0/4] Add support for iMX8MQ Display Controller Subsystem
Daniel Vetter
daniel at ffwll.ch
Fri Jul 17 04:59:17 EDT 2020
On Fri, Jul 17, 2020 at 10:18 AM Lucas Stach <l.stach at pengutronix.de> wrote:
>
> Hi Laurentiu,
>
> Am Donnerstag, den 09.07.2020, 19:47 +0300 schrieb 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 (in the downstream tree) and the upstream
> > MIPI-DSI driver (with a couple of patches on top, to make it work correctly with DCSS).
>
> I think the series (minus 3/5 and minor correction to the DT binding)
> is fine to go in now. So just some formal questions: are you going to
> maintain this driver in upstream? If so we should add a MAINTAINERS
> entry to that effect. I can offer to act as a reviewer in this case.
>
> How do you intend to merge this? IMO pushing this through drm-misc
> seems like the right thing to do. If you agree I can help you get this
> applied. If you are going to maintain the driver on your own, I think
> you should then apply for commit rights to drm-misc.
drm/imx isn't listed yet as under the drm-misc umbrella, maybe we
should put the entire collective of imx drivers under drm-misc? Or
maybe it's just an oversight that the git repo isn't specified in the
MAINTAINERS entry. Also maybe we should add the pengutronix kernel
team alias there too?
-Daniel
> Regards,
> Lucas
>
> > Thanks,
> > Laurentiu
> >
> > Changes in v5:
> > * Rebased to latest;
> > * Took out component framework support and made it a separate patch so
> > that people can still test with HDP driver, which makes use of it.
> > But the idea is to get rid of it once HDP driver's next versions
> > will remove component framework as well;
> > * Slight improvement to modesetting: avoid cutting off the pixel clock
> > if the new mode and the old one are equal. Also, in this case, is
> > not necessary to wait for DTG to shut off. This would allow to switch
> > from 8b RGB to 12b YUV422, for example, with no interruptions (at least
> > from DCSS point of view);
> > * Do not fire off CTXLD when going to suspend, unless it still has
> > entries that need to be committed to DCSS;
> > * Addressed Rob's comments on bindings;
> >
> > 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 (5):
> > drm/imx: compile imx directory by default
> > drm/imx: Add initial support for DCSS on iMX8MQ
> > drm/imx/dcss: add component framework functionality
> > dt-bindings: display: imx: add bindings for DCSS
> > arm64: dts: imx8mq: add DCSS node
> >
> > .../bindings/display/imx/nxp,imx8mq-dcss.yaml | 84 ++
> > 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 | 70 ++
> > drivers/gpu/drm/imx/dcss/dcss-crtc.c | 219 +++++
> > drivers/gpu/drm/imx/dcss/dcss-ctxld.c | 424 +++++++++
> > drivers/gpu/drm/imx/dcss/dcss-dev.c | 314 +++++++
> > drivers/gpu/drm/imx/dcss/dcss-dev.h | 177 ++++
> > 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 | 409 +++++++++
> > drivers/gpu/drm/imx/dcss/dcss-kms.c | 185 ++++
> > 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, 4123 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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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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