2015-07-09 14:15 GMT-03:00 Paulo Zanoni <przan...@gmail.com>: > 2015-07-09 14:10 GMT-03:00 Daniel Vetter <dan...@ffwll.ch>: >> On Wed, Jul 08, 2015 at 05:58:57PM -0300, Paulo Zanoni wrote: >>> From: Paulo Zanoni <paulo.r.zan...@intel.com> >>> >>> The doc is pretty clear that this register should be set to 0 on SNB. >>> We already write y_offset to DPFC_CPU_FENCE_OFFSET a few lines below. >>> >>> Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com> >> >> Hm, do we have testcases where we have a sufficiently big y offset? We can >> just allocate 128 lines more and use that as the offset, that should be >> big enough everywhere. Actually make that 129 lines to check the tile-size >> rounding ;-) > > Yes, it's 500x500. See FBS_MULTI on kms_frontbuffer_tracking. Subtests > with "sfb" on their names create a Single frontbuffer for each > possible primary plane (primary, secondary, offscreen), while subtests > with "mfb" have Multiple pipes pointing to the same frontbuffer. See > the small drawing inside kms_frontbuffer_tracking, at the top of > create_big_fb(). By the way, it's on my TODO list to change that > arrangement a little bit in order to avoid super-huge strides.
Also notice that I tested values other than 500x500 while developing patch 3. 500x500 seems like a nice value since it's not aligned with any tiles and never part of the first tile. > >> >> Ofc this means we need to have two sets of testcases for all the affected >> tests (i.e. everything that tries to test the gtt hw tracking). > > We do. > >> >> Another funny corner case (which we're getting wrong on skl even without >> fbc) is x offsets > 2048 pixels (since x/y offset registers don't hold >> bigger values and then it wraps). > > Can you please clarify the sentence above? For the dual-screen > subtests, if we use 2 screens of 1024 + the 500 pixel offset, we'll > already be bigger than 2048 pixels. > >> >> I.e. I'd like this patch (and the others) to be augmented with a Testcase: > > This one doesn't have a Testcase tag because I'm not testing SNB right > now, so I can't confirm anything here. Patch 3 has the useful > Testcases tags. > >> tag. >> >> Cheers, Daniel >> >>> --- >>> drivers/gpu/drm/i915/intel_fbc.c | 7 ++++++- >>> 1 file changed, 6 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/gpu/drm/i915/intel_fbc.c >>> b/drivers/gpu/drm/i915/intel_fbc.c >>> index 0373cbc..0a24e96 100644 >>> --- a/drivers/gpu/drm/i915/intel_fbc.c >>> +++ b/drivers/gpu/drm/i915/intel_fbc.c >>> @@ -216,7 +216,12 @@ static void ilk_fbc_enable(struct intel_crtc *crtc) >>> dpfc_ctl |= obj->fence_reg; >>> >>> y_offset = get_crtc_fence_y_offset(crtc); >>> - I915_WRITE(ILK_DPFC_FENCE_YOFF, y_offset); >>> + >>> + if (IS_GEN5(dev_priv)) >>> + I915_WRITE(ILK_DPFC_FENCE_YOFF, y_offset); >>> + else >>> + I915_WRITE(ILK_DPFC_FENCE_YOFF, 0); >>> + >>> I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | >>> ILK_FBC_RT_VALID); >>> /* enable it... */ >>> I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); >>> -- >>> 2.1.4 >>> >>> _______________________________________________ >>> Intel-gfx mailing list >>> Intel-gfx@lists.freedesktop.org >>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx >> >> -- >> Daniel Vetter >> Software Engineer, Intel Corporation >> http://blog.ffwll.ch > > > > -- > Paulo Zanoni -- Paulo Zanoni _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
