Re: [PATCH v14 0/17] Add Analogix Core Display Port Driver

[Yakir Yang <ykk@xxxxxxxxxxxxxx>]

On 07/29/2016 04:38 PM, Tomeu Vizoso wrote:
> On 5 April 2016 at 04:06, Yakir Yang <ykk@xxxxxxxxxxxxxx> wrote:
> > Hi Daniel,
> >
> >
> > On 03/31/2016 06:15 PM, Daniel Vetter wrote:
> > > On Mon, Feb 15, 2016 at 07:08:05PM +0800, 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 different between
> > > > exynos and rk3288.
> > > > 1. RK3288 have five special pll registers which not indicate 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).
> > > >
> > > > Due to Mark Yao have introduced the ATOMIC support to Rockchip drm, so
> > > > it's
> > > > okay to use the ATOMIC helpers functions in connector_funcs. No need to
> > > > splict
> > > > the connector init to platform driver anymore, and this is the biggest
> > > > change
> > > > since version 11.
> > > >
> > > > This v14 didn't have lots of new changes which seems not the correct time
> > > > to
> > > > upgrade the version number, but I have changed ordering of patches
> > > > (adding 2
> > > > more, and removing 2 out). Especially to prevent confusing people, so I
> > > > updated
> > > > the whole series.
> > > So I'm jumping into this part way late, but just noticed (well Thierry
> > > pointed this out to me) that the exynos dp driver reinvents all the dp and
> > > dp-aux helpers we already. That's somewhat okish for a private driver (and
> > > exynos has a reputation for that kind of stuff), but imo not ok for a
> > > shared driver.
> > >
> > > Not saying this should block merging this patch, but it really needs to be
> > > addressed. All the dp aux and edid read code in the current
> > > exynos_dp_core/reg.c files needs to be replaced with dp helpers and the
> > > core i2c edid reading code.
> > >
> > > Who's going to sign up to do this?
> >
> > Volunteer to that, after finish this thread, I would send new series to
> > switch to take use of dp helper.
> Hi Yakir,
>
> do you have plans to do this work in the short term? If not, I can tackle it.

Wow, that would be great if you like to tackle it  :-D

I always keep this in my mind, but haven't found an chance
to finish it. I would like to sit in your Cc list when you post
them out  ;)

Best Regards,
- Yakir

> Regards,
>
> Tomeu
>
> > :-D
> > - Yakir
> >
> >
> > > -Daniel
> > >
> > > > Thanks,
> > > > - Yakir
> > > >
> > > >
> > > > Changes in v14:
> > > > - Rebase the new changes in imx-dp driver
> > > > - Split up this patch into 3 parts, make this easy to review (Heiko)
> > > > - Remove the Rockchip DP PHY to an separate thread (Heiko)
> > > >       https://patchwork.kernel.org/patch/8312701/
> > > >
> > > > Changes in v13:
> > > > - Use .enable instead of preprare/commit in encoder_helper_funcs (Heiko)
> > > > - Fix the missing parameters with drm_encoder_init() helper function.
> > > > (Heiko)
> > > >
> > > > Changes in v12:
> > > > - Move the connector init to analogix_dp driver, and using ATOMIC helper
> > > > (Heiko)
> > > > - Add the ack from Jingoo
> > > > - Remove the enum link_rate_type struct, using the marcos in
> > > > drm_dp_helper.h (Jingoo)
> > > >
> > > > Changes in v11:
> > > > - Uses tabs to fix the indentation issues in analogix_dp_core.h (Heiko)
> > > > - Rename the "analogix,need-force-hpd" to common 'force-hpd' (Rob)
> > > > - Add the ack from Rob Herring
> > > > - Revert parts of Gustavo Padovan's changes in commit:
> > > >          drm/exynos: do not start enabling DP at bind() phase
> > > >     Add dp phy poweron function in bind time.
> > > > - Move the panel prepare from get_modes time to bind time, and move
> > > >     the panel unprepare from bridge->disable to unbind time. (Heiko)
> > > >
> > > > Changes in v10:
> > > > - Add the ack from Rob Herring
> > > > - Correct the ROCKCHIP_ANALOGIX_DP indentation in Kconfig to tabs here
> > > > (Heiko)
> > > > - Add the ack from Rob Herring
> > > > - Remove the surplus "plat_data" check. (Heiko)
> > > > -       switch (dp->plat_data && dp->plat_data->dev_type) {
> > > > +       switch (dp->plat_data->dev_type) {
> > > >
> > > > Changes in v9:
> > > > - Document more details for 'ports' property.
> > > >
> > > > 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)
> > > >
> > > > 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)
> > > >
> > > > Changes in v6:
> > > > - 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)
> > > >
> > > > 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.
> > > > - 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.
> > > > - 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:
> > > > - 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
> > > >
> > > > Heiko Stuebner (2):
> > > >     drm/exynos: dp: rename implementation specific driver part
> > > >     drm: bridge: analogix/dp: rename register constants
> > > >
> > > > Yakir Yang (15):
> > > >     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
> > > >     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
> > > >     drm: bridge: analogix/dp: add panel prepare/unprepare in
> > > >       suspend/resume time
> > > >     drm: bridge: analogix/dp: Fix the possible dead lock in bridge disable
> > > >       time
> > > >
> > > >    .../bindings/display/bridge/analogix_dp.txt        |   52 +
> > > >    .../bindings/display/exynos/exynos_dp.txt          |   93 +-
> > > >    .../display/rockchip/analogix_dp-rockchip.txt      |   92 ++
> > > >    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          |    2 -
> > > >    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 | 1430
> > > > ++++++++++++++++++
> > > >    drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  281 ++++
> > > >    drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  | 1320
> > > > +++++++++++++++++
> > > >    .../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                 |  324 +++++
> > > >    drivers/gpu/drm/exynos/exynos_dp_core.c            | 1510
> > > > --------------------
> > > >    drivers/gpu/drm/exynos/exynos_dp_core.h            |  282 ----
> > > >    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    |  384 +++++
> > > >    include/drm/bridge/analogix_dp.h                   |   41 +
> > > >    28 files changed, 4115 insertions(+), 3269 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 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 include/drm/bridge/analogix_dp.h
> > > >
> > > > --
> > > > 1.9.1
> > > >
> > > >
> > > > _______________________________________________
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> >
> >
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