[PATCH v5 3/9] drm: verisilicon: add a driver for Verisilicon display controllers

[Thomas Zimmermann]

Hi

Am 22.01.26 um 08:31 schrieb Thomas Zimmermann:
> Hi
>
> Am 22.01.26 um 08:06 schrieb Icenowy Zheng:
>> 在 2026-01-21星期三的 13:56 +0100，Thomas Zimmermann写道：
>>
>> =============== 8< =================
>>>> +
>>>> +       if (irqs)
>>>> +               pr_warn("Unknown Verisilicon DC interrupt 0x%x
>>>> fired!\n", irqs);
>>> I'd avoid pr_warn() here. This can fill your logs quickly.
>> Then is pr_warn_once() okay?
>
> Yeah, warn_once should be fine.

BTW drm_warn_once() would be preferable over plain pr_warn().

>
>>
>>>> +
>>>> +       return IRQ_HANDLED;
>>>> +}
>> =============== 8< =================
>
> Maybe consider returning IRQ_NONE if the (irq) tests succeeds.
>
>>
>>>> +       /* Fixup framebuffer address for src coordinates */
>>>> +       dma_addr += (state->src.x1 >> 16) * bpp;
>>> bpp is deprecated and should be avoided in new code. You can compute
>>> the
>>> offset with drm_format_min_pitch():
>>>
>>> drm_format_min_pitch(fb->format, 0, state->src.x1 >> 16 )
>> Well it seems quite difficult to track what's deprecated in the DRM
>> subsystem, is there anything like a bulletin?
>
> No, you either know or find out during the review. :) We also tend to 
> leave comments in the code. [1]
>
> [1] 
> https://elixir.bootlin.com/linux/v6.18.6/source/include/drm/drm_fourcc.h#L82
>
> Best regards
> Thomas
>
>>
>>
>> Thanks,
>> Icenowy
>

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)