Re: [Qemu-devel] [PATCH V3 6/8] Introduce xilinx dpdma.

[Frederic Konrad <fred.konrad@greensocs.com>]

On 11/07/2015 02:29, Hyun Kwon wrote:
> Hi Fred,
>
> Thanks for the patch.
>
>> -----Original Message-----
>> From: fred.konrad@greensocs.com [mailto:fred.konrad@greensocs.com]
>> Sent: Monday, July 06, 2015 9:22 AM
>> To: qemu-devel@nongnu.org
>> Cc: peter.maydell@linaro.org; Peter Crosthwaite; Hyun Kwon;
>> guillaume.delbergue@greensocs.com; mark.burton@greensocs.com;
>> fred.konrad@greensocs.com
>> Subject: [PATCH V3 6/8] Introduce xilinx dpdma.
>>
>> From: KONRAD Frederic <fred.konrad@greensocs.com>
>>
>> This is the implementation of the DPDMA.
>>
>> Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
>> ---
>>   hw/dma/Makefile.objs |   1 +
>>   hw/dma/xlnx_dpdma.c  | 789
>> +++++++++++++++++++++++++++++++++++++++++++++++++++
>>   hw/dma/xlnx_dpdma.h  |  77 +++++
>>   3 files changed, 867 insertions(+)
>>   create mode 100644 hw/dma/xlnx_dpdma.c
>>   create mode 100644 hw/dma/xlnx_dpdma.h
>>
>> diff --git a/hw/dma/Makefile.objs b/hw/dma/Makefile.objs
>> index 0e65ed0..5451836 100644
>> --- a/hw/dma/Makefile.objs
>> +++ b/hw/dma/Makefile.objs
>> @@ -8,6 +8,7 @@ common-obj-$(CONFIG_XILINX_AXI) += xilinx_axidma.o
>>   common-obj-$(CONFIG_ETRAXFS) += etraxfs_dma.o
>>   common-obj-$(CONFIG_STP2000) += sparc32_dma.o
>>   common-obj-$(CONFIG_SUN4M) += sun4m_iommu.o
>> +obj-$(CONFIG_XLNX_ZYNQMP) += xlnx_dpdma.o
>>
>>   obj-$(CONFIG_OMAP) += omap_dma.o soc_dma.o
>>   obj-$(CONFIG_PXA2XX) += pxa2xx_dma.o
>> diff --git a/hw/dma/xlnx_dpdma.c b/hw/dma/xlnx_dpdma.c
>> new file mode 100644
>> index 0000000..a327085
>> --- /dev/null
>> +++ b/hw/dma/xlnx_dpdma.c
>> @@ -0,0 +1,789 @@
>> +/*
>> + * xlnx_dpdma.c
> [snip]
>
>> +
>> +size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
>> +                                    bool one_desc)
>> +{
>> +    uint64_t desc_addr;
>> +    uint64_t source_addr[6];
>> +    DPDMADescriptor desc;
>> +    bool done = false;
>> +    size_t ptr = 0;
>> +
>> +    assert(channel <= 5);
>> +
>> +    /* Trigger a VSYNC IRQ when the graphic callback asks for data. */
>> +    if (channel == 3) {
>> +        s->registers[DPDMA_ISR] |= (1 << 27);
>> +        xlnx_dpdma_update_irq(s);
>> +    }
> I'd rather make this VSYNC interrupt generation as a separate function, and have it called by whenever xlnx_dp_update_display() is called. Please see my comment in patch 7/8 as well.
>
> Thanks,
> -hyun

Ok I do that.

Thanks,
Fred

>
>
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