On Tue, Mar 10, 2015 at 03:35:19PM +0530, Purushothaman, Vijay A wrote: > On 3/6/2015 12:49 AM, ville.syrjala@xxxxxxxxxxxxxxx wrote: > >From: Vidya Srinivas <vidya.srinivas@xxxxxxxxx> > > > >PFI credit programming is required when CD clock (related to data flow from > >display pipeline to end display) is greater than CZ clock (related to data > >flow from memory to display plane). This programming should be done when all > >planes are OFF to avoid intermittent hangs while accessing memory even from > >different Gfx units (not just display). > > > >If cdclk/czclk >=1, PFI credits could be set as any number. To get better > >performance, larger PFI credit can be assigned to PND. Otherwise if > >cdclk/czclk<1, the default PFI credit of 8 should be set. > > > >v2: > > - Change log to lower log level instead of DRM_ERROR > > - Change function name to valleyview_program_pfi_credits > > - Move program PFI credits to modeset_init instead of intel_set_mode > > - Change magic numbers to logical constants > > > >[vsyrjala v3: > > - only program in response to cdclk update > > - program the credits also when cdclk<czclk > > - add CHV bits > > v4: > > - Change CHV cdclk<czclk credits to 12 (Vijay)] > > > >Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx> > >Signed-off-by: Gajanan Bhat <gajanan.bhat@xxxxxxxxx> > >Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx> > >Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > >--- > > Reviewed-by: Vijay Purushothaman <vijay.a.purushothaman@xxxxxxxxxxxxxxx> Pulled in the remaining 4 patches from this series, thanks. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
