[Intel-gfx] [PATCH] drm/i915: Make sample_c messages go faster on Haswell.

[Xiang, Haihao]

On Mon, 2015-01-05 at 21:54 -0800, Kenneth Graunke wrote:
> On Tuesday, January 06, 2015 01:11:53 PM Xiang, Haihao wrote:
> > 
> > Hi Kenneth,
> > 
> > How did you test OSD ? I can't reproduce the issue you mentioned, OSD
> > works well for me when using mplayer-vaapi with the latest
> > libva/libva-intel-driver master branch.
> > 
> > I tried your patch, what surprised me is OSD still works well after
> > applying your patch. It seems your patch didn't disable the palette.
> > 
> > Thanks
> > Haihao
> 
> I ran:
> 
> mplayer -osdlevel 3 -vo vaapi big_buck_bunny_720p_stereo.ogg
> 
> For me, the OSD text is solid green, with hard edges.

The OSD text is white for me when using mplayer -osdlevel 3 -vo vaapi
xxx. If possible, could you update your mplayer ?

> 
> If you use "-vo gl" or "-vo xv", the OSD is solid white text with a black
> border around it.  I presume that it's supposed to be white with vaapi as
> well, but I guess I'm not entirely sure.
> 
> It's possible that the optimization doesn't affect the palette as long as
> you never use sample_c with the paletted textures.


I verified the palette takes effect in the following way:

1. Only support P8A8 format in the driver

2. ran the above command and I saw white OSD text

3. Only support P4A4 format in the driver and don't use
3DSTATE_SAMPLER_PALETTE_LOAD0 to load the value to the texture palette,
so the palette keeps unchanged. 

4. ran the above command and I saw black OSD text.

5. Load the right value to the texture palette and ran the above command
again, I saw white OSD text.

Hence I think sample_c with the paletted textures is used in the driver.


> 
> --Ken