Re: [PATCH v10 00/21] drm/mediatek: Add mt8195 DisplayPort driver

[Rex-BC Chen <rex-bc.chen@mediatek.com>]

On Thu, 2022-06-02 at 11:50 +0800, Rex-BC Chen wrote:
> On Mon, 2022-05-23 at 12:47 +0200, Guillaume Ranquet wrote:
> > this series is built around the DisplayPort driver. The dpi/dpintf
> > driver and the added helper functions are required for the
> > DisplayPort
> > driver to work.
> > 
> > This v10 still has some un-answered comments and TODOs for v11.
> > 
> > This has been tested sucessfully on a 5.18-next based "vendor
> > branch".
> > 
> > There's a missing dependency in the mediatek clock framework to
> > allow
> > a
> > mux clock to change it's parent automatically on rate change.
> > Without this change, the dpi driver won't properly set the clocks
> > on
> > mode change and thus nothing will be displayed on screen.
> > 
> > Changes from v9:
> > - The DP-Phy is back to being a child device of the DP driver (as
> > in
> > v8)
> > - hot plug detection has been added back to Embedded Display
> > Port...
> > as
> >   after discussing with mediatek experts, this is needed eventhough
> > the
> >   Embedded Display port is not un-pluggable
> > - rebased on linux-next
> > - simplified/split train_handler function, as suggested by Rex
> > - added comments on the sleep/delays present in the code
> > - removed previous patch introducing retries when receiving
> > AUX_DEFER
> > as
> >   this is already handled in the dp_aux framework
> > - added max-lane and max-linkrate device tree u8 properties instead
> > of
> >   hardcoded #defines
> > 
> > Things that are in my todolist for v11:
> > - retrieve CK/DE support from panel driver instead of hardcoding it
> > into
> >   the dpi driver
> > - refcount the dp driver "enabled" status for "future proofing"
> > - review the drm_dp_helpers for features/functions that have been
> >   re-implemented in the mediatek dp drivers
> > 
> > Older revisions:
> > RFC - 
> > 
https://lore.kernel.org/linux-mediatek/20210816192523.1739365-1-msp@baylibre.com/
> > v1  - 
> > 
https://lore.kernel.org/linux-mediatek/20210906193529.718845-1-msp@baylibre.com/
> > v2  - 
> > 
https://lore.kernel.org/linux-mediatek/20210920084424.231825-1-msp@baylibre.com/
> > v3  - 
> > 
https://lore.kernel.org/linux-mediatek/20211001094443.2770169-1-msp@baylibre.com/
> > v4  - 
> > 
https://lore.kernel.org/linux-mediatek/20211011094624.3416029-1-msp@baylibre.com/
> > v5  - 
> > 
https://lore.kernel.org/all/20211021092707.3562523-1-msp@baylibre.com/
> > v6  - 
> > 
https://lore.kernel.org/linux-mediatek/20211110130623.20553-1-granquet@baylibre.com/
> > v7  - 
> > 
https://lore.kernel.org/linux-mediatek/20211217150854.2081-1-granquet@baylibre.com/
> > v8  - 
> > 
https://lore.kernel.org/linux-mediatek/20220218145437.18563-1-granquet@baylibre.com/
> > v9  - 
> > 
https://lore.kernel.org/all/20220327223927.20848-1-granquet@baylibre.com/
> > 
> > Functional dependencies are:
> > - Add Mediatek Soc DRM (vdosys0) support for mt8195
> >   
> > 
https://lore.kernel.org/linux-mediatek/20220419094143.9561-2-jason-jh.lin@mediatek.com/
> > - Add MediaTek SoC DRM (vdosys1) support for mt8195
> >   
> > 
https://lore.kernel.org/linux-mediatek/20220512053128.31415-1-nancy.lin@mediatek.com/
> > 
> > 
> > Guillaume Ranquet (15):
> >   drm/edid: Convert cea_sad helper struct to kernelDoc
> >   drm/edid: Add cea_sad helpers for freq/length
> >   drm/mediatek: dpi: move dpi limits to SoC config
> >   drm/mediatek: dpi: implement a CK/DE pol toggle in SoC config
> >   drm/mediatek: dpi: implement a swap_input toggle in SoC config
> >   drm/mediatek: dpi: move dimension mask to SoC config
> >   drm/mediatek: dpi: move hvsize_mask to SoC config
> >   drm/mediatek: dpi: move swap_shift to SoC config
> >   drm/mediatek: dpi: move the yuv422_en_bit to SoC config
> >   drm/mediatek: dpi: move the csc_enable bit to SoC config
> >   drm/mediatek: dpi: Add dpintf support
> >   drm/mediatek: dpi: Only enable dpi after the bridge is enabled
> >   drm/meditek: dpi: Add matrix_sel helper
> >   drm/mediatek: Add mt8195 External DisplayPort support
> >   drm/mediatek: DP audio support for mt8195
> > 
> > Jitao Shi (1):
> >   drm/mediatek: add hpd debounce
> > 
> > Markus Schneider-Pargmann (5):
> >   dt-bindings: mediatek,dpi: Add DPINTF compatible
> >   dt-bindings: mediatek,dp: Add Display Port binding
> >   video/hdmi: Add audio_infoframe packing for DP
> >   phy: phy-mtk-dp: Add driver for DP phy
> >   drm/mediatek: Add mt8195 Embedded DisplayPort driver
> > 
> >  .../display/mediatek/mediatek,dp.yaml         |   99 +
> >  .../display/mediatek/mediatek,dpi.yaml        |   13 +-
> >  MAINTAINERS                                   |    1 +
> >  drivers/gpu/drm/drm_edid.c                    |   74 +
> >  drivers/gpu/drm/mediatek/Kconfig              |    8 +
> >  drivers/gpu/drm/mediatek/Makefile             |    2 +
> >  drivers/gpu/drm/mediatek/mtk_dp.c             | 3419
> > +++++++++++++++++
> >  drivers/gpu/drm/mediatek/mtk_dp_reg.h         |  570 +++
> >  drivers/gpu/drm/mediatek/mtk_dpi.c            |  272 +-
> >  drivers/gpu/drm/mediatek/mtk_dpi_regs.h       |   38 +
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c   |    8 +
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h   |    1 +
> >  drivers/gpu/drm/mediatek/mtk_drm_drv.c        |    8 +-
> >  drivers/gpu/drm/mediatek/mtk_drm_drv.h        |    3 +
> >  drivers/phy/mediatek/Kconfig                  |    8 +
> >  drivers/phy/mediatek/Makefile                 |    1 +
> >  drivers/phy/mediatek/phy-mtk-dp.c             |  200 +
> >  drivers/video/hdmi.c                          |   82 +-
> >  include/drm/dp/drm_dp_helper.h                |    2 +
> >  include/drm/drm_edid.h                        |   26 +-
> >  include/linux/hdmi.h                          |    7 +-
> >  include/linux/soc/mediatek/mtk-mmsys.h        |    4 +-
> >  22 files changed, 4765 insertions(+), 81 deletions(-)
> >  create mode 100644
> > Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
> >  create mode 100644 drivers/gpu/drm/mediatek/mtk_dp.c
> >  create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_reg.h
> >  create mode 100644 drivers/phy/mediatek/phy-mtk-dp.c
> 
> Hello all,
> 
> Due to the resource issue, I will keep upstreaming Guillaume's MT8195
> dp/edp series.
> 
> I will check the comments for v8/v9/v10 and have some discussion with
> you.
> 
> Thanks for your all comments.
> 
> BRs,
> Bo-Chen
> 

Hello all,

Because the patches of dp_intf seem to be almost completed, I want to
split this series into two series:
dp_intf and edp/dp.

It will be easier to review and maintain this series.

Thanks!

BRs,
Bo-Chen