Re: [PATCH v8 0/17] Add Analogix Core Display Port Driver

[Yakir Yang]

Hi Jingoo & Exynos DRM Maintainers (Inki & Andrzej & Joonyoung) & Bridge 
Maintainers (Thierry?):

Ping.......

The front part of this series (exynos_dp to analogix_dp) haven't received
more comments in the pasted several months. Is it difficult to carry those
patches without new changes but rebased on the latest kernel again and
again. If you thought those patches is fine, it would be very grateful to
give some ACKs to those changes.

Thanks,
- Yakir

On 10/28/2015 04:15 PM, Yakir Yang wrote:
> Hi all,
>
>     The Samsung Exynos eDP controller and Rockchip RK3288 eDP controller
> share the same IP, so a lot of parts can be re-used. I split the common
> code into bridge directory, then rk3288 and exynos only need to keep
> some platform code. Cause I can't find the exact IP name of exynos dp
> controller, so I decide to name dp core driver with "analogix" which I
> find in rk3288 eDP TRM
>
> But  there are still three light registers setting differents bewteen
> exynos and rk3288.
> 1. RK3288 have five special pll resigters which not indicata in exynos
>     dp controller.
> 2. The address of DP_PHY_PD(dp phy power manager register) are different
>     between rk3288 and exynos.
> 3. Rk3288 and exynos have different setting with AUX_HW_RETRY_CTL(dp debug
>     register).
>
> This series have been well tested on Rockchip platform with eDP panel on
> Jerry Chromebook and Display Port Monitor on RK3288 board. Also I have
> tested on Samsung Snow and Peach Pit Chromebooks, and thanks to Javier@Samsung
> help to retest the whole series on Samsung Exynos5800 Peach Pi Chromebook,
> glad to say that things works rightlly.
>
> Thanks,
> - Yakir
>
>
> Changes in v8:
> - Correct the right document path of display-timing.txt (Heiko)
> - Correct the misspell of 'from' to 'frm'. (Heiko)
> - Modify the commit subject name. (Heiko)
> - Fix the mixed spacers on macro definitions. (Heiko)
> - Remove the unnecessary empty line after clk_prepare_enable. (Heiko)
> - Remove the specific address in the example node name. (Heiko)
>
> Changes in v7:
> - Back to use the of_property_read_bool() interfacs to provoid backward
>    compatibility of "hsync-active-high" "vsync-active-high" "interlaced"
>    to avoid -EOVERFLOW error (Krzysztof)
> - Simply the commit message. (Kishon)
> - Symmetrical enable/disbale the phy clock and power. (Kishon)
> - Simplify the commit message. (Kishon)
>
> Changes in v6:
> - Fix the wrong code in previous series, and test on Samsung snow Chromebook
>    successfully, here are the detail changes:
> =============>
> -       if (!dp->panel && !dp->bridge) {
> +       if (!dp->panel && !dp->ptn_bridge) {
>                  ret = exynos_dp_dt_parse_panel(dp);
>                  if (ret)
> =============>
> +       encoder->bridge = bridge;
> 	bridge->driver_private = dp;
>          bridge->encoder = encoder;
>          bridge->funcs = &exynos_dp_bridge_funcs;
>          ret = drm_bridge_attach(drm_dev, bridge);
> - Fix the Kconfig recursive dependency (Javier)
> - Fix Peach Pit hpd property name error:
> -       hpd-gpio = <&gpx2 6 0>;
> +       hpd-gpios = <&gpx2 6 0>;
>
> Changes in v5:
> - Correct the check condition of gpio_is_valid when driver try to get
>    the "hpd-gpios" DT propery. (Heiko)
> - Move the platform attach callback in the front of core driver bridge
>    attch function. Cause once platform failed at attach, core driver should
>    still failed, so no need to init connector before platform attached (Krzysztof)
> - Keep code style no changes with the previous exynos_dp_code.c in this
>    patch, and update commit message about the new export symbol (Krzysztof)
> - Gather the device type patch (v4 11/16) into this one. (Krzysztof)
> - leave out the connector registration to analogix platform driver. (Thierry)
> - Resequence this patch after analogix_dp driver have been split
>    from exynos_dp code, and rephrase reasonable commit message, and
>    remove some controversial style (Krzysztof)
>      -		analogix_dp_write_byte_to_dpcd(
>      - 				dp, DP_TEST_RESPONSE,
>      +		analogix_dp_write_byte_to_dpcd(dp,
>      +				DP_TEST_RESPONSE,
> 				DP_TEST_EDID_CHECKSUM_WRITE);
> - Switch video timing type to "u32", so driver could use "of_property_read_u32"
>    to get the backword timing values. Krzysztof suggest me that driver could use
>    the "of_property_read_bool" to get backword timing values, but that interfacs
>    would modify the original drm_display_mode timing directly (whether those
>    properties exists or not).
> - Correct the misspell in commit message. (Krzysztof)
> - Remove the empty line at the end of document, and correct the endpoint
>    numbers in the example DT node, and remove the regulator iomux setting
>    in driver code while using the pinctl in devicetree instead. (Heiko)
> - Add device type declared, cause the previous "platform device type
>    support (v4 11/16)" already merge into (v5 02/14).
> - Implement connector registration code. (Thierry)
> - Split binding doc's from driver changes. (Rob)
> - Add eDP hotplug pinctrl property. (Heiko)
> - Remove "reg" DT property, cause driver could poweron/poweroff phy via
>    the exist "grf" syscon already. And rename the example DT node from
>    "edp_phy: phy@ff770274" to "edp_phy: edp-phy" directly. (Heiko)
> - Add deivce_node at the front of driver, update phy_ops type from "static
>    struct" to "static const struct". And correct the input paramters of
>    devm_phy_create() interfaces. (Heiko)
> - Split binding doc's from driver changes. (Rob)
> - Update the rockchip,grf explain in document, and correct the clock required
>    elemets in document. (Rob & Heiko)
> - Fix compiled error (Heiko)
> - Using the connector display info message to configure eDP driver input
>    video mode, but hard code CRTC video output mode to RGBaaa.
>
> Changes in v4:
> - Update "analogix,hpd-gpios" to "hpd-gpios" DT propery. (Rob)
> - Rename "analogix_dp-exynos.c" file name to "exynos_dp.c" (Jingoo)
> - Create a separate folder for analogix code in bridge/ (Archit)
> - Update commit message more readable. (Jingoo)
> - Adjust the order from 05 to 04
> - Provide backword compatibility with samsung. (Krzysztof)
> - Split all DTS changes, and provide backward compatibility. Mark old
>    properties as deprecated but still support them. (Krzysztof)
> - Update "analogix,hpd-gpio" to "hpd-gpios" prop name. (Rob)
> - Deprecated some properties which could parsed from Edid/Mode/DPCD. (Thierry)
>      "analogix,color-space" & "analogix,color-depth"   &
>      "analogix,link-rate"   & "analogix,lane-count"    &
>      "analogix,ycbcr-coeff" & "analogix,dynamic-range" &
>      "vsync-active-high"    & "hsync-active-high"      & "interlaces"
> - Separate all DTS changes to a separate patch. (Krzysztof)
> - Remove some deprecated DT properties in rockchip dp document.
> - Add commit message, and remove the redundant rockchip_dp_phy_init()
>    function, move those code to probe() method. And remove driver .owner
>    number. (Kishon)
> - Seprate the link-rate and lane-count limit out with the device_type
>    flag. (Thierry)
> - Take Jingoo suggest, add commit messages.
> - Call drm_panel_prepare() in .get_modes function, ensure panel should
>    power on before driver try to read edid message.
>
> Changes in v3:
> - Move exynos's video_timing code to analogix_dp-exynos platform driver,
>    add get_modes method to struct analogix_dp_plat_data. (Thierry)
> - Rename some "samsung*" dts propery to "analogix*". (Heiko)
> - The link_rate and lane_count shouldn't config to the DT property value
>    directly, but we can take those as hardware limite. For example, RK3288
>    only support 4 physical lanes of 2.7/1.62 Gbps/lane, so DT property would
>    like "link-rate = 0x0a" "lane-count = 4". (Thierry)
> - Dynamic parse video timing info from struct drm_display_mode and
>    struct drm_display_info. (Thierry)
> - Add devicetree binding documents. (Heiko)
> - Remove sync pol & colorimetry properies from the new analogix dp driver
>    devicetree binding. (Thierry)
> - Update the exist exynos dtsi file with the latest DP DT properies.
> - Leave "sclk_edp_24m" to rockchip dp phy driver which name to "24m",
>    and leave "sclk_edp" to analogix dp core driver which name to "dp",
>    and leave "pclk_edp" to rockchip dp platform driver which name to
>    "pclk". (Thierry & Heiko)
> - Add devicetree binding document. (Heiko)
> - Remove "rockchip,panel" DT property, take use of remote point to get panel
>    node. (Heiko)
> - Add the new function point dp_platdata->get_modes() init.
> - Suggest, add rockchip dp phy driver, collect the phy clocks and
>    power control. (Heiko)
> - Add "analogix,need-force-hpd" to indicate whether driver need foce
>    hpd when hpd detect failed.
> - move dp hpd detect to connector detect function.
> - Add edid modes parse support
>
> Changes in v2:
> - Keep author name list no changed (Jingoo)
> - Remove new copyright (Jingoo)
> - Fix compiled failed due to analogix_dp_device misspell
> - Improved commit message more readable, and avoid using some
>    uncommon style like bellow: (Joe Preches)
>      -  retval = exynos_dp_read_bytes_from_i2c(...
>    				  ...);
>      +  retval =
>      +  exynos_dp_read_bytes_from_i2c(......);
> - Get panel node with remote-endpoint method, and create devicetree binding
>    for driver. (Heiko)
> - Remove the clock enable/disbale with "sclk_edp" & "sclk_edp_24m",
>    leave those clock to rockchip dp phy driver.
> - Fix compile failed dut to phy_pd_addr variable misspell error
>
> Mark Yao (1):
>    drm: rockchip: vop: add bpc and color mode setting
>
> Yakir Yang (16):
>    drm: exynos: dp: convert to drm bridge mode
>    drm: bridge: analogix/dp: split exynos dp driver to bridge directory
>    drm: bridge: analogix/dp: fix some obvious code style
>    drm: bridge: analogix/dp: remove duplicate configuration of link rate
>      and link count
>    drm: bridge: analogix/dp: dynamic parse sync_pol & interlace &
>      dynamic_range
>    dt-bindings: add document for analogix display port driver
>    ARM: dts: exynos/dp: remove some properties that deprecated by
>      analogix_dp driver
>    drm: rockchip: dp: add rockchip platform dp driver
>    dt-bindings: add document for rockchip variant of analogix_dp
>    phy: Add driver for rockchip Display Port PHY
>    dt-bindings: add document for rockchip dp phy
>    drm: bridge: analogix/dp: add some rk3288 special registers setting
>    drm: bridge: analogix/dp: add max link rate and lane count limit for
>      RK3288
>    drm: bridge: analogix/dp: try force hpd after plug in lookup failed
>    drm: bridge: analogix/dp: move hpd detect to connector detect function
>    drm: bridge: analogix/dp: add edid modes parse in get_modes method
>
>   .../bindings/display/bridge/analogix_dp.txt        |   52 +
>   .../bindings/display/exynos/exynos_dp.txt          |   66 +-
>   .../display/rockchip/analogix_dp-rockchip.txt      |   91 ++
>   .../devicetree/bindings/phy/rockchip-dp-phy.txt    |   22 +
>   arch/arm/boot/dts/exynos5250-arndale.dts           |    2 -
>   arch/arm/boot/dts/exynos5250-smdk5250.dts          |    2 -
>   arch/arm/boot/dts/exynos5250-snow-common.dtsi      |    4 +-
>   arch/arm/boot/dts/exynos5250-spring.dts            |    4 +-
>   arch/arm/boot/dts/exynos5420-peach-pit.dts         |    4 +-
>   arch/arm/boot/dts/exynos5420-smdk5420.dts          |    2 -
>   arch/arm/boot/dts/exynos5800-peach-pi.dts          |    4 +-
>   drivers/gpu/drm/bridge/Kconfig                     |    2 +
>   drivers/gpu/drm/bridge/Makefile                    |    1 +
>   drivers/gpu/drm/bridge/analogix/Kconfig            |    3 +
>   drivers/gpu/drm/bridge/analogix/Makefile           |    1 +
>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 1373 +++++++++++++++++++
>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  286 ++++
>   drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  | 1294 ++++++++++++++++++
>   .../analogix/analogix_dp_reg.h}                    |  270 ++--
>   drivers/gpu/drm/exynos/Kconfig                     |    3 +-
>   drivers/gpu/drm/exynos/Makefile                    |    2 +-
>   drivers/gpu/drm/exynos/exynos_dp.c                 |  349 +++++
>   drivers/gpu/drm/exynos/exynos_dp_core.c            | 1404 --------------------
>   drivers/gpu/drm/exynos/exynos_dp_core.h            |  281 ----
>   drivers/gpu/drm/exynos/exynos_dp_reg.c             | 1263 ------------------
>   drivers/gpu/drm/rockchip/Kconfig                   |    9 +
>   drivers/gpu/drm/rockchip/Makefile                  |    1 +
>   drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    |  457 +++++++
>   drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c        |    2 +-
>   drivers/gpu/drm/rockchip/rockchip_drm_drv.h        |    2 +-
>   drivers/gpu/drm/rockchip/rockchip_drm_vop.c        |   32 +-
>   drivers/phy/Kconfig                                |    7 +
>   drivers/phy/Makefile                               |    1 +
>   drivers/phy/phy-rockchip-dp.c                      |  155 +++
>   include/drm/bridge/analogix_dp.h                   |   42 +
>   35 files changed, 4348 insertions(+), 3145 deletions(-)
>   create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>   create mode 100644 Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
>   create mode 100644 Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt
>   create mode 100644 drivers/gpu/drm/bridge/analogix/Kconfig
>   create mode 100644 drivers/gpu/drm/bridge/analogix/Makefile
>   create mode 100644 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>   create mode 100644 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
>   create mode 100644 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
>   rename drivers/gpu/drm/{exynos/exynos_dp_reg.h => bridge/analogix/analogix_dp_reg.h} (62%)
>   create mode 100644 drivers/gpu/drm/exynos/exynos_dp.c
>   delete mode 100644 drivers/gpu/drm/exynos/exynos_dp_core.c
>   delete mode 100644 drivers/gpu/drm/exynos/exynos_dp_core.h
>   delete mode 100644 drivers/gpu/drm/exynos/exynos_dp_reg.c
>   create mode 100644 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>   create mode 100644 drivers/phy/phy-rockchip-dp.c
>   create mode 100644 include/drm/bridge/analogix_dp.h


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