drm: rcar-du: Reject modes that fail CRTC timing requirements

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The hardware requires the HDSR and VDSR registers to be set to 1 or
higher. This translates to a minimum combined horizontal sync and back
porch of 20 pixels and a minimum vertical back porch of 3 lines. Reject
modes that fail those requirements.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

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Laurent Pinchart 2018-11-11 04:15:08 +02:00

parent 63a298f22a

commit 256856efb8

1 changed files with 12 additions and 0 deletions

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drivers/gpu/drm/rcar-du/rcar_du_crtc.c

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