lkml.org 
[lkml]   [2018]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 4/4] media: venus: add PIL support
Hi Trilok,

On 2018-05-18 06:10, Trilok Soni wrote:
> Hi Vikash,
>
> On 5/17/2018 4:32 AM, Vikash Garodia wrote:
>> This adds support to load the video firmware
>> and bring ARM9 out of reset. This is useful
>> for platforms which does not have trustzone
>> to reset the ARM9.
>
> ARM9 = video core here? May be commit text needs little bit more
> detail.
Yes, ARM9 here refers to the CPU running the firmware inside video core.
I can add some more detail on the same.

>> +static int store_firmware_dev(struct device *dev, void *data)
>> +{
>> + struct venus_core *core;
>> +
>> + core = (struct venus_core *)data;
>
> No need of casting.

Ok. Will remove the casting.

>
>> + if (!core)
>> + return -EINVAL;
>> +
>> + if (of_device_is_compatible(dev->of_node, "qcom,venus-pil-no-tz"))
>> + core->fw.dev = dev;
>> +
>> + return 0;
>> +}
>> +
>
>
>> - ret = venus_boot(dev, core->res->fwname);
>> + ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
>> + if (ret)
>> + goto err_runtime_disable;
>> +
>> + /* Attempt to register child devices */
>> + ret = device_for_each_child(dev, core, store_firmware_dev);
>> +
>
> and not ret check needed?

Not needed. The fn (store_firmware_dev) just stores the child device
pointer.
Later in the driver, if the child device pointer is not populated, probe
is
deferred. Again, child device for which this populate is added, is an
optional
child node.

>> + ret = venus_boot(core);
>> if (ret)
>> goto err_runtime_disable;
>>

\
 
 \ /
  Last update: 2018-05-18 14:21    [W:0.128 / U:0.840 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site