[Intel-gfx] [PATCH 11/11] drm/i915/opregion: handle VBT sizes bigger than 6 KB

[Ville Syrjälä]

On Mon, Dec 14, 2015 at 04:19:50PM +0200, Ville Syrjälä wrote:
> On Mon, Dec 14, 2015 at 12:50:55PM +0200, Jani Nikula wrote:
> > The RVDA and RVDS (raw VBT data address and size) fields of the ASLE
> > mailbox may specify an alternate location for VBT instead of mailbox #4.
> > Use the alternate location if available and valid, falling back to
> > mailbox #4 otherwise.
> > 
> > Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> > ---
> >  drivers/gpu/drm/i915/i915_drv.h       |  1 +
> >  drivers/gpu/drm/i915/intel_opregion.c | 25 +++++++++++++++++++++++--
> >  2 files changed, 24 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index ca8c2a64bc6d..8cfac7398568 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -457,6 +457,7 @@ struct intel_opregion {
> >  	u32 swsci_gbda_sub_functions;
> >  	u32 swsci_sbcb_sub_functions;
> >  	struct opregion_asle *asle;
> > +	void *rvda;
> >  	const void *vbt;
> >  	u32 vbt_size;
> >  	u32 *lid_state;
> > diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
> > index e89ee2383fe1..a139889dd45b 100644
> > --- a/drivers/gpu/drm/i915/intel_opregion.c
> > +++ b/drivers/gpu/drm/i915/intel_opregion.c
> > @@ -837,6 +837,10 @@ void intel_opregion_fini(struct drm_device *dev)
> >  
> >  	/* just clear all opregion memory pointers now */
> >  	memunmap(opregion->header);
> > +	if (opregion->rvda) {
> > +		memunmap(opregion->rvda);
> > +		opregion->rvda = NULL;
> > +	}
> >  	opregion->header = NULL;
> >  	opregion->acpi = NULL;
> >  	opregion->swsci = NULL;
> > @@ -987,12 +991,29 @@ int intel_opregion_setup(struct drm_device *dev)
> >  	`	DRM_DEBUG_DRIVER("ASLE extension supported\n");
> >  
> >  	if (!dmi_check_system(intel_no_opregion_vbt)) {
> > -		const void *vbt = base + OPREGION_VBT_OFFSET;
> > -		u32 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
> > +		const void *vbt = NULL;
> > +		u32 vbt_size = 0;
> > +
> > +		if (opregion->header->opregion_ver >= 2 && opregion->asle &&
> > +		    opregion->asle->rvda && opregion->asle->rvds) {
> 
> Either I'm blind or you didn't actually add rvda/rvds to struct opregion_asle.

Oh I se they went in seprately as
c85f6c91ec42 ("drm/i915: add VBT address and size fields to ASLE mailbox struct")

OK, so apart from the few minor bikesheds I listed it all looks good to
me. For the series
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> 
> Also the spec seems confused as usual. Some parts if it refer to this
> as RVDA others as RVBT. Although RVBT also seems to be what the mbox #4
> contents are called in another place, and to add insult to injury that
> place also has the offset and size all wrong. Sigh.
> 
> Anyway, apart from the missing rvda/rvds definititions the rest looks OK.
> 
> > +			opregion->rvda = memremap(opregion->asle->rvda,
> > +						  opregion->asle->rvds,
> > +						  MEMREMAP_WB);
> > +			vbt = opregion->rvda;
> > +			vbt_size = opregion->asle->rvds;
> > +		}
> >  
> >  		if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
> >  			opregion->vbt = vbt;
> >  			opregion->vbt_size = vbt_size;
> > +			DRM_DEBUG_DRIVER("VBT from RVDA\n");
> > +		} else {
> > +			vbt = base + OPREGION_VBT_OFFSET;
> > +			vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
> > +			if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
> > +				opregion->vbt = vbt;
> > +				opregion->vbt_size = vbt_size;
> > +			}
> >  		}
> >  	}
> >  
> > -- 
> > 2.1.4
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Ville Syrjälä
> Intel OTC
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC