[PATCH v5 19/24] drm/msm/dsi: Add support for SM8750

[Krzysztof Kozlowski]

On 03/05/2025 00:52, Dmitry Baryshkov wrote:
> On Wed, Apr 30, 2025 at 03:00:49PM +0200, Krzysztof Kozlowski wrote:
>> Add support for DSI on Qualcomm SM8750 SoC with notable difference:
>>
>> DSI PHY PLLs, the parents of pixel and byte clocks, cannot be used as
>> parents before DSI PHY is configured, the PLLs are prepared and their
>> initial rate is set.  Therefore assigned-clock-parents are not working
>> here and driver is responsible for reparenting clocks with proper
>> procedure: see dsi_clk_init_6g_v2_9().
> 
> Is it still the case? I thought you've said that with the proper flags

Yes, as we discussed many times - this is still needed even with the
proper flags.

> there would be no need to perform this in the driver.

assigned-clock-xxx are not respecting that flag and anyway, even if that
was solved, they are executed too early - before PHY is initialized. You
cannot prepare PHY PLL before PHY is initialized and enabled.

Best regards,
Krzysztof