linux-kernel - [PATCH v4 0/8] Add MT8195 HDMI support

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Message-Id: <20220919-v4-0-687f09a06dd9@baylibre.com>
Date:   Mon, 29 May 2023 16:30:57 +0200
From:   Guillaume Ranquet <granquet@...libre.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, CK Hu <ck.hu@...iatek.com>,
        Jitao shi <jitao.shi@...iatek.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, mac.shen@...iatek.com,
        stuart.lee@...iatek.com, Guillaume Ranquet <granquet@...libre.com>
Subject: [PATCH v4 0/8] Add MT8195 HDMI support

Add support for HDMI Tx on MT8195.

This includes a split of the current "legacy" hdmi driver into a common
library of functions and two dedicated compilation units with specific
code for mt8167 and another for the "v2" mt8195 SoC.

Support for the new mt8195 dpi/drm_drv adjustments to support hdmi.

Based on next-20230523

Still in my TODO-list for v5:

- Removal of the 'is_internal_hdmi' flag in mtk_dpi. [1]
    I Couldn't find a way to get rid of it with the way things are done
    in mtk_drm_drv/mtk_ddp_comp.
- Do not use a "virtual" device for the ddc v2 hw as it is embedded in
  the hdmi IP. [2]
    Seems that a lot of work is done by the framework when using a
    proper device-tree entry that can be linked as the ddc-i2c-bus of
    the hdmi-connector.
    I will keep the virtual device unless I find a way to avoid
    rewriting the framework code that handles this.

[1] : https://lore.kernel.org/all/988b0a7a-69bb-34e4-e777-1d9516221077@collabora.com/
[2] : https://lore.kernel.org/all/7da1e73a0cca6867a060d5b69d45e8d4dfc89748.camel@mediatek.com/

Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
---

Changes in v4:
- Split phy related patches to another series (merged)
- Removed regmap wrappers in mtk_hdmi
- Removed colorimetry related changes as this initial version only
  support one color depth
- Fixed dt-bindings properties
- Removed some now useless clocks from mtk_hdmi_v2 and mtk_dpi
- Link to v3: https://lore.kernel.org/r/20220919-v3-0-a803f2660127@baylibre.com

Changes in v3:
- phy: Grouped register and bit definition together to add clarity
- dt-bindings: Addressed comments
- Link to v2: https://lore.kernel.org/r/20220919-v2-0-8419dcf4f09d@baylibre.com

Changes in v2:
- Removed syscon requirement from the hdmi node
- Use as much as possible bit FIELD_PREP/FIELD_GET macros across all the
  patches
- Make cec optional dynamically instead of hardcoded with a flag
- Renamed hdmi variants to v1 (legacy) and v2 (mt8195) while waiting for
  a better name
- Rework hdmi v2 code to use a connector (same as v1)
- Remove "magic" 0x43 addr special handling in hdmi ddc code
- Link to v1: https://lore.kernel.org/r/20220919-v1-0-4844816c9808@baylibre.com

---
Guillaume Ranquet (8):
      dt-bindings: display: mediatek: add MT8195 hdmi bindings
      drm/mediatek: hdmi: use a regmap instead of iomem
      drm/mediatek: extract common functions from the mtk hdmi driver
      drm/mediatek: hdmi: make the cec dev optional
      drm/mediatek: hdmi: add v2 support
      drm/mediatek: hdmi: v2: add audio support
      dt-bindings: display: mediatek: dpi: Add compatible for MediaTek MT8195
      drm/mediatek: dpi: Add mt8195 hdmi to DPI driver

 .../bindings/display/mediatek/mediatek,dpi.yaml    |    1 +
 .../bindings/display/mediatek/mediatek,hdmi.yaml   |   59 +-
 .../display/mediatek/mediatek,mt8195-hdmi-ddc.yaml |   45 +
 drivers/gpu/drm/mediatek/Kconfig                   |    2 +
 drivers/gpu/drm/mediatek/Makefile                  |    5 +-
 drivers/gpu/drm/mediatek/mtk_dpi.c                 |  121 +-
 drivers/gpu/drm/mediatek/mtk_dpi_regs.h            |    5 +
 drivers/gpu/drm/mediatek/mtk_hdmi.c                |  773 ++----------
 drivers/gpu/drm/mediatek/mtk_hdmi.h                |   18 +
 drivers/gpu/drm/mediatek/mtk_hdmi_common.c         |  437 +++++++
 drivers/gpu/drm/mediatek/mtk_hdmi_common.h         |  208 ++++
 drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c         |  362 ++++++
 drivers/gpu/drm/mediatek/mtk_hdmi_regs_v2.h        |  276 +++++
 drivers/gpu/drm/mediatek/mtk_hdmi_v2.c             | 1303 ++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_hdmi_v2.h             |   32 +
 15 files changed, 2955 insertions(+), 692 deletions(-)
---
base-commit: c8a64c6a78c54887da437098d97dc2accc689e89
change-id: 20220919-hdmi_mtk

Best regards,
-- 
Guillaume Ranquet <granquet@...libre.com>