tree 3a394d9306af2f119eac2488bfafdef113014719
parent e0e4c64a64780a8672480618142776de8bf98d07
author Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> 1637919314 +0000
committer Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> 1638807589 +0200

drm: rcar-du: crtc: Support external DSI dot clock

On platforms with an external clock, both the group and crtc must be
handled accordingly to correctly pass through the external clock and
configure the DU to use the external rate.

The CRTC support was missed while adding the DSI support on the r8a779a0
which led to the output clocks being incorrectly determined.

Ensure that when a CRTC is routed through the DSI encoder, the external
clock is used without any further divider being applied.

Fixes: b291fdcf5114 ("drm: rcar-du: Add r8a779a0 device support")
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>