Re: [PATCH] drm: rcar-du: Fix DU3 start/stop on M3-N

2018-11-27 Thread Simon Horman
On Fri, Nov 23, 2018 at 01:48:08PM +0200, Laurent Pinchart wrote: > Group start/stop is controlled by the DRES and DEN bits of DSYSR0 for > the first group and DSYSR2 for the second group. On most DU instances, > this maps to the first CRTC of the group. On M3-N, however, DU2 doesn't > exist, but D

Re: [PATCH] drm: rcar-du: Fix DU3 start/stop on M3-N

2018-11-27 Thread Hoan
Dear Laurent-san Thank you for your comments on my patches! I understand. With this patch,  the problem has been improved. CC Simon-san If you wait a little longer, the error log will look like this: [    2.825800] [drm] No driver support for vblank timestamp query. [   13.027591] [drm:drm_at

Re: [PATCH] drm: rcar-du: Fix DU3 start/stop on M3-N

2018-11-26 Thread Laurent Pinchart
Hello Hoan-san, On Monday, 26 November 2018 11:46:56 EET Hoan wrote: > Dear Laurent-san > > Thank you for your comments on my patches! I understand. > > With this patch, the problem has been improved. > > CC Simon-san > > If you wait a little longer, the error log will look like this: There

Re: [PATCH] drm: rcar-du: Fix DU3 start/stop on M3-N

2018-11-23 Thread Kieran Bingham
Hi Laurent, Thank you for the patch. On 23/11/2018 11:48, Laurent Pinchart wrote: > Group start/stop is controlled by the DRES and DEN bits of DSYSR0 for > the first group and DSYSR2 for the second group. On most DU instances, > this maps to the first CRTC of the group. On M3-N, however, DU2 does