linux-kernel - [PATCH 00/13] Clean up "mediatek,larb" after adding device

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Date:   Tue, 1 Jan 2019 12:51:03 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>
CC:     Robin Murphy <robin.murphy@....com>,
        Tomasz Figa <tfiga@...gle.com>,
        Will Deacon <will.deacon@....com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <arnd@...db.de>,
        <yingjoe.chen@...iatek.com>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, Nicolas Boichat <drinkcat@...omium.org>
Subject: [PATCH 00/13] Clean up "mediatek,larb" after adding device_link

MediaTek IOMMU block diagram always like below:

        M4U
         |
    smi-common
         |
  -------------
  |         |  ...
  |         |
larb1     larb2
  |         |
vdec       venc

All the consumer connect with smi-larb, then connect with smi-common.

MediaTek IOMMU don't have its power-domain. When the consumer works,
it should enable the smi-larb's power which also need enable the smi-common's
power firstly.

Thus, Firstly, use the device link connect the consumer and the
smi-larbs. then add device link between the smi-larb and smi-common.

The ref_count of the device_link normally is over 1, when the consumer
device driver is removed, we should remove all the device_link, Hence,
I add the patch "driver core: xxx" at the beginning of this patchset.

After adding the device_link, then "mediatek,larb" property can be removed.
the iommu consumer don't need call the mtk_smi_larb_get/put to enable
the power and clock of smi-larb and smi-common.

This patchset depends on "MT8183 IOMMU SUPPORT"[1].

[1] https://lists.linuxfoundation.org/pipermail/iommu/2019-January/032387.html

Yong Wu (13):
  dt-binding: mediatek: Get rid of mediatek,larb for multimedia HW
  driver core: Remove the link if there is no driver with AUTO flag
  iommu/mediatek: Add probe_defer for smi-larb
  iommu/mediatek: Add device_link between the consumer and the larb
    devices
  memory: mtk-smi: Add device-link between smi-larb and smi-common
  media: mtk-jpeg: Get rid of mtk_smi_larb_get/put
  media: mtk-mdp: Get rid of mtk_smi_larb_get/put
  media: mtk-vcodec: Get rid of mtk_smi_larb_get/put
  drm/mediatek: Get rid of mtk_smi_larb_get/put
  memory: mtk-smi: Get rid of mtk_smi_larb_get/put
  iommu/mediatek: Use builtin_platform_driver
  arm: dts: mediatek: Get rid of mediatek,larb for MM nodes
  arm64: dts: mediatek: Get rid of mediatek,larb for MM nodes

 .../bindings/display/mediatek/mediatek,disp.txt    |  9 -----
 .../bindings/media/mediatek-jpeg-decoder.txt       |  4 ---
 .../devicetree/bindings/media/mediatek-mdp.txt     |  8 -----
 .../devicetree/bindings/media/mediatek-vcodec.txt  |  4 ---
 arch/arm/boot/dts/mt2701.dtsi                      |  1 -
 arch/arm/boot/dts/mt7623.dtsi                      |  1 -
 arch/arm64/boot/dts/mediatek/mt8173.dtsi           | 15 --------
 drivers/base/core.c                                |  4 +--
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c            | 11 ------
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c        | 26 --------------
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h        |  1 -
 drivers/iommu/mtk_iommu.c                          | 40 +++++++++-------------
 drivers/iommu/mtk_iommu_v1.c                       | 32 ++++++++---------
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c    | 22 ------------
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h    |  2 --
 drivers/media/platform/mtk-mdp/mtk_mdp_comp.c      | 38 --------------------
 drivers/media/platform/mtk-mdp/mtk_mdp_comp.h      |  2 --
 drivers/media/platform/mtk-mdp/mtk_mdp_core.c      |  1 -
 .../media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c  | 19 ----------
 drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h |  3 --
 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c |  1 -
 .../media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c  | 38 --------------------
 drivers/memory/mtk-smi.c                           | 30 ++++------------
 include/soc/mediatek/smi.h                         | 20 -----------
 24 files changed, 40 insertions(+), 292 deletions(-)

-- 
1.9.1