On 25/08/2022 08:59, Bo-Chen Chen wrote:
On Thu, 2022-08-25 at 14:11 +0800, Krzysztof Kozlowski wrote:
On 25/08/2022 08:56, Bo-Chen Chen wrote:
From: "Jason-JH.Lin" <jason-jh.lin@xxxxxxxxxxxx>
For previous MediaTek SoCs, such as MT8173, there are 2 display HW
pipelines binding to 1 mmsys with the same power domain, the same
clock driver and the same mediatek-drm driver.
For MT8195, VDOSYS0 and VDOSYS1 are 2 display HW pipelines binding
to
2 different power domains, different clock drivers and different
mediatek-drm drivers.
drop clock driver example here.
I don't see binding to different clock drivers and anyway that's not
really an argument here. Please focus in description on hardware
properties, IOW, are devices compatible or different. What is the
incompatible difference between VDOSYS0 and 1?
Best regards,
Krzysztof
Hello Krzysztof,
Thanks for yor review.
From the functions perspective:
Hardware pipeline of VDOSYS0 has these components: COLOR, CCORR, AAL,
GAMMA, DITHER.
They are related to PQ (Picture Quality) functions and they makes
VDOSYS0 supports PQ function while they are not including in VDOSYS1.
Hardware pipeline of VDOSYS1 has the component ETHDR (HDR related
component).
It makes VDOSYS1 supports the HDR function while it's not including in
VDOSYS0.
Please include a description of this in the commit message.
About mediatek ETHDR, you can refer to this series:
https://lore.kernel.org/all/20220819061456.8042-2-nancy.lin@xxxxxxxxxxxx/
To summary:
Only VDOSYS0 can support PQ adjustment.
Only VDOSYS1 can support HDR adjustment.
Is this description ok for you?
If it is ok, I will put them into commit message in next version.
BRs,
Bo-Chen
