linux-kernel - Re: [PATCH v5 00/11] drm/bridge: dw-hdmi: implement bus-format negotiation and YUV420 support

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Date:   Tue, 10 Mar 2020 11:08:12 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     p.zabel@...gutronix.de, heiko@...ech.de, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...l.net, boris.brezillon@...labora.com
Cc:     linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 00/11] drm/bridge: dw-hdmi: implement bus-format
 negotiation and YUV420 support

On 04/03/2020 11:40, Neil Armstrong wrote:
> Hi Philippe, Heiko, Maxime, Laurent,
> 
> A bad negociation was detected on platforms not implementing a bridge on the
> encoder side, which has been fixed in this version.
> 
> Could you check it doesn't break your platforms using dw-hdmi ? Especially
> patches 1-5.
> 
> Thanks,
> Neil
> 
> This patchset is based on Boris's merged "drm: Add support for bus-format negotiation"
> patchset to implement full bus-format negotiation for DW-HDMI, including YUV420 support and
> 10/12/16bit YUV444, YUV422 and RGB. The Color Space Converter support is already implemented.
> 
> And the counterpart implementation in the Amlogic Meson VPU dw-hdmi glue :
> - basic bus-format negotiation to select YUV444 bus-format as DW-HDMI input
> - YUV420 support when HDMI2.0 YUV420 modeset
> 
> This is a follow-up from the previous attempts :
> - "drm/meson: Add support for HDMI2.0 YUV420 4k60" at [2]
> - "drm/meson: Add support for HDMI2.0 4k60" at [3]
> 
> Changes since v4 at [7]:
> - Cleaned up patch 1
> - Added comment on patch 2
> - Added commit message on patch 3
> - Fixed invalid negociation when encoder is not yet a bridge (seen on allwinner & rockchip platforms) on patch 4
> - Fixed invalid defines, handled MEDIA_BUS_FMT_FIXED and cleaned negociation debug on patch 4
> - Added tags on patch 5, 6
> - Removed meson_venc_hdmi_encoder_get_out_bus_fmts on patch 7
> - Add off-list r-b from Jernej
> 
> Changes since v3 at [6]:
> - Added "Plug atomic state hooks to the default implementation" on drm/bridge: dw-hdmi
> - Also added these atomic state hooks in meson-dw-hdmi in patch 7
> - Rebased on latest drm-misc-next including patches 1-7 of [1]
> 
> Changes since RFC v2 at [5]:
> - Added fixes from Jonas, who tested and integrated it for Rockchip SoCs
> - Added support for 10/12/16bit tmds clock calculation
> - Added support for max_bcp connector property
> - Adapted to Boris's v4 patchset
> - Fixed typos reported by boris
> 
> Changes since RFC v1 at [4]:
> - Rewrote negociation using the v2 patchset, including full DW-HDMI fmt negociation
> 
> [2] https://patchwork.freedesktop.org/patch/msgid/20190520133753.23871-1-narmstrong@baylibre.com
> [3] https://patchwork.freedesktop.org/patch/msgid/1549022873-40549-1-git-send-email-narmstrong@baylibre.com
> [4] https://patchwork.freedesktop.org/patch/msgid/20190820084109.24616-1-narmstrong@baylibre.com
> [5] https://patchwork.freedesktop.org/patch/msgid/20190827081425.15011-1-narmstrong@baylibre.com
> [6] https://patchwork.freedesktop.org/patch/msgid/20191218154637.17509-1-narmstrong@baylibre.com
> [7] https://patchwork.freedesktop.org/patch/msgid/20200206191834.6125-1-narmstrong@baylibre.com
> 
> Jonas Karlman (2):
>   drm/bridge: dw-hdmi: set mtmdsclock for deep color
>   drm/bridge: dw-hdmi: add max bpc connector property
> 
> Neil Armstrong (9):
>   drm/bridge: dw-hdmi: Plug atomic state hooks to the default
>     implementation
>   drm/bridge: synopsys: dw-hdmi: add bus format negociation
>   drm/bridge: synopsys: dw-hdmi: allow ycbcr420 modes for >= 0x200a
>   drm/meson: venc: make drm_display_mode const
>   drm/meson: meson_dw_hdmi: add bridge and switch to drm_bridge_funcs
>   drm/meson: dw-hdmi: stop enforcing input_bus_format
>   drm/meson: venc: add support for YUV420 setup
>   drm/meson: vclk: add support for YUV420 setup
>   drm/meson: Add YUV420 output support
> 
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 319 +++++++++++++++++++++-
>  drivers/gpu/drm/meson/meson_dw_hdmi.c     | 180 +++++++++---
>  drivers/gpu/drm/meson/meson_vclk.c        |  93 +++++--
>  drivers/gpu/drm/meson/meson_vclk.h        |   7 +-
>  drivers/gpu/drm/meson/meson_venc.c        |  10 +-
>  drivers/gpu/drm/meson/meson_venc.h        |   4 +-
>  drivers/gpu/drm/meson/meson_venc_cvbs.c   |   6 +-
>  include/drm/bridge/dw_hdmi.h              |   1 +
>  8 files changed, 544 insertions(+), 76 deletions(-)
> 

Pushed to drm-misc-next

Neil