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Re: [Qemu-devel] [PATCH V5 0/8] Xilinx DisplayPort.


From: Alistair Francis
Subject: Re: [Qemu-devel] [PATCH V5 0/8] Xilinx DisplayPort.
Date: Wed, 18 Nov 2015 10:43:24 +0530

On Mon, Oct 19, 2015 at 1:13 PM, Frederic Konrad
<address@hidden> wrote:
> On 16/10/2015 23:57, Alistair Francis wrote:
>> On Fri, Oct 16, 2015 at 6:41 AM,  <address@hidden> wrote:
>>> From: KONRAD Frederic <address@hidden>
>>>
>>> This is the fifth version of this patch-set of the implementation of the 
>>> Xilinx
>>> DisplayPort and DPDMA.
>>>
>>> This fifth version moves some headers files to the right directory.
>>>
>>> Second patch introduces an AUX bus needed by the DP to read the DPCD.
>>> It's also possible to connect an I2C device on it to to I2C through AUX
>>> commands. The drivers requires I2C broadcast write to be modeled as well 
>>> which
>>> seems to be missing currently upstream.
>>>
>>> The tree can be cloned at:
>>> address@hidden:fkonrad/xilinx_dp.git branch xilinx_dp_v5_release
>> I can't seem to access this, is it public?
>>
>> Thanks,
>>
>> Alistair
> oops, sorry for that.
> Should be ok now.

Great! That works

Thanks,

Alistair

>
> Thanks,
> Fred
>>> Details of the DPDMA part:
>>>  * DPDMA is implemented as a QEMU SYSBUS device.
>>>  * Interrupts are implemented except the axi error and fifo.
>>>
>>> Details of the XILINX-DP:
>>>  * DP is also implemented as a QEMU SYSBUS. Multiple memory regions are 
>>> used to
>>>    avoid having a single big region as there are holes in the DP memory map.
>>>  * An aux-bus has been implemented, it creates a memory map for aux slaves 
>>> and
>>>    has an i2c bus (which is already implemented in QEMU).
>>>  * The normal programmable i2c clock and controller implementation is 
>>> missing
>>>    from the QEMU tree so the easiest way for us was to implement a dummy-clk
>>>    driver in the kernel. It's a clock which does nothing but fakes a clock 
>>> such
>>>    that the DPDMA driver works. The patch will be send separately.
>>>  * The graphic plane works on channel 3, video on channel 0 and audios on
>>>    channel 4 and 5.
>>>
>>> Thanks,
>>> Fred
>>>
>>> V4 -> V5 changes:
>>>   * aux:
>>>     * Move the header include/hw => include/hw/misc
>>>   * dpcd:
>>>     * Move the header hw/display => include/hw/display
>>>   * i2c-ddc:
>>>     * Move the header hw/i2c => include/hw/i2c
>>>   * xlnx_dpdma:
>>>     * Move the header hw/dma => include/hw/dma
>>>     * Fix some styles issues.
>>>   * xlnx_dp:
>>>     * Move the header hw/display => include/hw/display
>>>   * globally:
>>>     * Rebased on current master (c49d3411faae8ffaab8f7e5db47405a008411c10).
>>>
>>> V3 -> V4 changes:
>>>   * xlnx_dpdma:
>>>     * Initialize operation_finished during reset.
>>>     * Add a function to trigger a VSYNC interrupt from the xlnx_dp.
>>>   * xlnx_dp:
>>>     * Fix the default pixman format for video buffer.
>>>     * Remove unused buffer.
>>>   * dpcd:
>>>     * Add the missing DPCD_LANE_X_STATUS.
>>>     * Set status field for all ports to avoid driver error.
>>>     * Use 4 lines by default.
>>>     * Use guest error in case of an outbound access.
>>>   * i2c broadcast:
>>>     * Use a list of device instead of relying on broadcast field to remove 
>>> duped
>>>       code.
>>>   * other:
>>>     * rebased on current master (774ee4772b6838b78741ea52d4bf26b8922244c5)
>>>
>>> V2 -> V3 changes:
>>>   * dpcd:
>>>     * Add a CONFIG_DPCD.
>>>   * i2c-ddc:
>>>     * Fill in VMSD.
>>>   * aux:
>>>     * Remove address field.
>>>     * Add a CONFIG_AUX.
>>>   * dpdma:
>>>     * Fill in VMSD.
>>>     * Some coding style changes.
>>>   * dp:
>>>     * Fill in VMSD.
>>>     * Coding style changes.
>>>
>>> V1 -> V2 changes:
>>>   * xlnx-zynqmp:
>>>     * Remove the dummy object_property_add_child(..).
>>>   * dpcd:
>>>     * Compile only when the ZYNQMP platform is compiled.
>>>     * Use qemu_log instead of printf.
>>>     * Compile test debug traces.
>>>     * Remove the unused current_reg.
>>>     * Remove the blank realize.
>>>     * Use dpcd_ prefixes instead of aux_ prefixes.
>>>     * Add a reset callback.
>>>     * Add the VMSD.
>>>     * Add size constraint in the MemoryRegionOps structure instead of 
>>> asserting.
>>>     * Style fixes.
>>>   * aux:
>>>     * Compile only when the ZYNQMP platform is compiled.
>>>     * Remove the class init and the class for aux-slave.
>>>   * dpdma:
>>>     * Compile only when the ZYNQMP platform is compiled.
>>>     * Unify per channel macro in one, simplify the switch case.
>>>     * Use extractXX.
>>>     * Make DPDMA_GBL an or'ed register.
>>>   * dp:
>>>     * Compile only when the ZYNQMP platform is compiled.
>>>     * Don't look at the audio channel count.
>>>     * Use a third pixman plane when we do blending.
>>>   * other:
>>>     * Drop the useless "console: add qemu_alloc_display_format." patch as
>>>       suggested by Gerd.
>>>     * Rebase on current master (f3e3b083d4c266ea864ae3c83da49d4086857679).
>>>
>>> KONRAD Frederic (7):
>>>   i2cbus: remove unused dev field
>>>   introduce aux-bus
>>>   i2c: implement broadcast write
>>>   introduce dpcd module
>>>   introduce xlnx-dpdma
>>>   introduce xlnx-dp
>>>   arm: xlnx-zynqmp: Add xlnx-dp and xlnx-dpdma
>>>
>>> Peter Maydell (1):
>>>   hw/i2c-ddc.c: Implement DDC I2C slave
>>>
>>>  default-configs/aarch64-softmmu.mak |    3 +
>>>  hw/arm/xlnx-zynqmp.c                |   20 +
>>>  hw/display/Makefile.objs            |    2 +
>>>  hw/display/dpcd.c                   |  171 +++++
>>>  hw/display/xlnx_dp.c                | 1370 
>>> +++++++++++++++++++++++++++++++++++
>>>  hw/dma/Makefile.objs                |    1 +
>>>  hw/dma/xlnx_dpdma.c                 |  788 ++++++++++++++++++++
>>>  hw/i2c/Makefile.objs                |    1 +
>>>  hw/i2c/core.c                       |  131 ++--
>>>  hw/i2c/i2c-ddc.c                    |  302 ++++++++
>>>  hw/misc/Makefile.objs               |    1 +
>>>  hw/misc/aux.c                       |  374 ++++++++++
>>>  include/hw/arm/xlnx-zynqmp.h        |    5 +
>>>  include/hw/display/dpcd.h           |  105 +++
>>>  include/hw/display/xlnx_dp.h        |  110 +++
>>>  include/hw/dma/xlnx_dpdma.h         |   85 +++
>>>  include/hw/i2c/i2c-ddc.h            |   36 +
>>>  include/hw/misc/aux.h               |  125 ++++
>>>  18 files changed, 3575 insertions(+), 55 deletions(-)
>>>  create mode 100644 hw/display/dpcd.c
>>>  create mode 100644 hw/display/xlnx_dp.c
>>>  create mode 100644 hw/dma/xlnx_dpdma.c
>>>  create mode 100644 hw/i2c/i2c-ddc.c
>>>  create mode 100644 hw/misc/aux.c
>>>  create mode 100644 include/hw/display/dpcd.h
>>>  create mode 100644 include/hw/display/xlnx_dp.h
>>>  create mode 100644 include/hw/dma/xlnx_dpdma.h
>>>  create mode 100644 include/hw/i2c/i2c-ddc.h
>>>  create mode 100644 include/hw/misc/aux.h
>>>
>>> --
>>> 1.9.0
>>>
>>>
>
>



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