Hi,
On 16/04/2025 16:27, Geert Uytterhoeven wrote:
Hi all,
On Fri, 18 Oct 2024 at 11:33, Geert Uytterhoeven
<geert+renesas@xxxxxxxxx> wrote:
Add support for the mini-DisplayPort connector on the White Hawk
BreakOut board. This port is driven by a TI SN65DSI86 DSI to eDP
bridge, which in turn gets the pixel data from the second DSI channel on
the R-Car V4H SoC. Note that this port is not present on the White Hawk
Single development board.
Based on the work by Tomi Valkeinen for the mini-DP port on the White
Hawk CPU board, and by a patch in the BSP by LUU HOAI.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Does not work:
- Display resolution is detected correctly (1920x1080 or 2560x1440),
- Black screen, displays say no signal detected,
The second display pipeline has a Display Stream Compression (DSC)
encoder between the Display Unit (DU) and the DSI encoder. Forcing the
DSC module clock on gives a working display, just like on Sparrow Hawk.
So now we just need DT bindings for the DSC, and a very simple DSC
driver that calls pm_runtime_resume_and_get() ;-)
Alright, nice. Sometimes (rarely...) the solution is as easy as we
thought it would be ;)
Tomi
