Re: [PATCH v3 11/38] drm/msm/dp: separate dp_display_prepare() into its own API

[Yongxing Mou]

On 8/26/2025 1:39 AM, Dmitry Baryshkov wrote:
> On Mon, Aug 25, 2025 at 10:15:57PM +0800, Yongxing Mou wrote:
> > From: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
> >
> > dp_display_prepare() only prepares the link in case its not
> > already ready before dp_display_enable(). Hence separate it into
> > its own API.
>
> Why?
In the MST use case, this is expected to work as follows: when multiple 
sinks (two or more) need to be enabled, dp_display_prepare() handles 
link-related setup and should only be executed once, while 
dp_display_enable() is responsible for stream-related handling and may 
be executed multiple times.
> > Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
> > Signed-off-by: Yongxing Mou <yongxing.mou@xxxxxxxxxxxxxxxx>
> > ---
> >   drivers/gpu/drm/msm/dp/dp_display.c | 16 ++++++++++++----
> >   drivers/gpu/drm/msm/dp/dp_display.h |  1 +
> >   drivers/gpu/drm/msm/dp/dp_drm.c     |  2 ++
> >   3 files changed, 15 insertions(+), 4 deletions(-)