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Message-ID: <77354704-70cd-fd07-5ea6-4572dfad0c52@ti.com>
Date: Wed, 13 Nov 2019 10:08:44 +0200
From: Tero Kristo <t-kristo@...com>
To: Bjorn Andersson <bjorn.andersson@...aro.org>
CC: <ohad@...ery.com>, <linux-remoteproc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
<s-anna@...com>
Subject: Re: [PATCH 08/17] remoteproc/omap: Add support for DRA7xx remote
processors
On 12/11/2019 20:13, Bjorn Andersson wrote:
> On Tue 12 Nov 00:37 PST 2019, Tero Kristo wrote:
>
>> On 12/11/2019 01:37, Bjorn Andersson wrote:
>>> On Mon 28 Oct 05:42 PDT 2019, Tero Kristo wrote:
> [..]
>>>> + for (; data && data->device_name; data++) {
>>>> + if (!strcmp(dev_name(&pdev->dev), data->device_name))
>>>
>>> I don't fancy the reliance on node names in devicetree, is this well
>>> defined in the binding?
>>
>> I don't think it is.... So, would it be better to just replace the
>> compatible strings for dra7 remoteprocs to be like ti,dra7-dsp1 /
>> ti,dra7-dsp2 etc.? I think that would clean up the code also quite a bit.
>>
>
> While it would solve "my" problem I'm not entirely sure about it being
> a proper way to flag that they should have different default firmware.
>
> One way would be to simply rely on a "firmware-name" property read from
> DeviceTree (this was previously objected to, but we have that for
> several bindings now).
Ok, that should work, and would make things easily customizable also.
-Tero
>
> Regards,
> Bjorn
>
>>>
>>>> + return data->fw_name;
>>>> + }
>>>> +
>>>> + return ERR_PTR(-ENOENT);
>>>> }
>>>> static int omap_rproc_get_boot_data(struct platform_device *pdev,
>>>> @@ -334,7 +384,8 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
>>>> int ret;
>>>> if (!of_device_is_compatible(np, "ti,omap4-dsp") &&
>>>> - !of_device_is_compatible(np, "ti,omap5-dsp"))
>>>> + !of_device_is_compatible(np, "ti,omap5-dsp") &&
>>>> + !of_device_is_compatible(np, "ti,dra7-dsp"))
>>>> return 0;
>>>> oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data),
>>>> @@ -360,18 +411,27 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
>>>> return -EINVAL;
>>>> }
>>>> + if (of_device_is_compatible(np, "ti,dra7-dsp"))
>>>> + oproc->boot_data->boot_reg_shift = 10;
>>>
>>> Put this in omap_rproc_dev_data.
>>
>> Yeah.
>>
>>>
>>>> +
>>>> return 0;
>>>> }
>>>> static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
>>>> struct rproc *rproc)
>>>> {
>>>> - static const char * const mem_names[] = {"l2ram"};
>>>> + static const char * const ipu_mem_names[] = {"l2ram"};
>>>> + static const char * const dra7_dsp_mem_names[] = {"l2ram", "l1pram",
>>>> + "l1dram"};
>>>> struct device_node *np = pdev->dev.of_node;
>>>> struct omap_rproc *oproc = rproc->priv;
>>>> struct device *dev = &pdev->dev;
>>>> + const char * const *mem_names;
>>>> struct resource *res;
>>>> int num_mems;
>>>> + const __be32 *addrp;
>>>> + u32 l4_offset = 0;
>>>> + u64 size;
>>>> int i;
>>>> /* OMAP4 and OMAP5 DSPs do not have support for flat SRAM */
>>>> @@ -379,7 +439,15 @@ static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
>>>> of_device_is_compatible(np, "ti,omap5-dsp"))
>>>> return 0;
>>>> - num_mems = ARRAY_SIZE(mem_names);
>>>> + /* DRA7 DSPs have two additional SRAMs at L1 level */
>>>> + if (of_device_is_compatible(np, "ti,dra7-dsp")) {
>>>> + mem_names = dra7_dsp_mem_names;
>>>> + num_mems = ARRAY_SIZE(dra7_dsp_mem_names);
>>>> + } else {
>>>> + mem_names = ipu_mem_names;
>>>> + num_mems = ARRAY_SIZE(ipu_mem_names);
>>>> + }
>>>> +
>>>> oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem),
>>>> GFP_KERNEL);
>>>> if (!oproc->mem)
>>>> @@ -395,7 +463,26 @@ static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
>>>> return PTR_ERR(oproc->mem[i].cpu_addr);
>>>> }
>>>> oproc->mem[i].bus_addr = res->start;
>>>> - oproc->mem[i].dev_addr = OMAP_RPROC_IPU_L2RAM_DEV_ADDR;
>>>> +
>>>> + /*
>>>> + * The DSPs have the internal memories starting at a fixed
>>>> + * offset of 0x800000 from address 0, and this corresponds to
>>>> + * L2RAM. The L3 address view has the L2RAM bus address as the
>>>> + * starting address for the IP, so the L2RAM memory region needs
>>>> + * to be processed first, and the device addresses for each
>>>> + * memory region can be computed using the relative offset
>>>> + * from this base address.
>>>> + */
>>>> + if (of_device_is_compatible(np, "ti,dra7-dsp") &&
>>>
>>> Please don't use a ternary operator repeatedly, it makes the code hard
>>> to follow.
>>
>> Yeah this parts looks somewhat messy, let me try to fix that.
>>
>> -Tero
>>
>>>
>>> Regards,
>>> Bjorn
>>>
>>>> + !strcmp(mem_names[i], "l2ram")) {
>>>> + addrp = of_get_address(dev->of_node, i, &size, NULL);
>>>> + l4_offset = of_translate_address(dev->of_node, addrp);
>>>> + }
>>>> + oproc->mem[i].dev_addr =
>>>> + of_device_is_compatible(np, "ti,dra7-dsp") ?
>>>> + res->start - l4_offset +
>>>> + OMAP_RPROC_DSP_LOCAL_MEM_OFFSET :
>>>> + OMAP_RPROC_IPU_L2RAM_DEV_ADDR;
>>>> oproc->mem[i].size = resource_size(res);
>>>> dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %p da 0x%x\n",
>>>> --
>>>> 2.17.1
>>>>
>>>> --
>>
>> --
--
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