Hello Jani and Matt,
> -----Original Message-----
> From: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Sent: Tuesday, January 24, 2023 8:02 PM
> To: Borah, Chaitanya Kumar <chaitanya.kumar.borah@xxxxxxxxx>; intel-
> gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Shankar, Uma <uma.shankar@xxxxxxxxx>; Syrjala, Ville
> <ville.syrjala@xxxxxxxxx>; Srivatsa, Anusha <anusha.srivatsa@xxxxxxxxx>;
> Roper, Matthew D <matthew.d.roper@xxxxxxxxx>; Atwood, Matthew S
> <matthew.s.atwood@xxxxxxxxx>; Borah, Chaitanya Kumar
> <chaitanya.kumar.borah@xxxxxxxxx>
> Subject: Re: [RFC 1/2] drm/i915: Add RPL-U sub platform
>
> On Tue, 17 Jan 2023, Chaitanya Kumar Borah
> <chaitanya.kumar.borah@xxxxxxxxx> wrote:
> > Separate out RPLU device ids and add them to both RPL and newly
> > created RPL-U subplatforms.
> >
> > v2: (Matt)
> > - Sort PCI-IDs numerically
> > - Name the sub-platform to accurately depict what it is for
> > - Make RPL-U part of RPL subplatform
> >
> > v3: revert to RPL-U subplatform (Jani)
> >
> > Signed-off-by: Chaitanya Kumar Borah
> <chaitanya.kumar.borah@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/i915_drv.h | 2 ++
> > drivers/gpu/drm/i915/i915_pci.c | 1 +
> > drivers/gpu/drm/i915/intel_device_info.c | 8 ++++++++
> > drivers/gpu/drm/i915/intel_device_info.h | 2 ++
> > include/drm/i915_pciids.h | 11 +++++++----
> > 5 files changed, 20 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h
> > b/drivers/gpu/drm/i915/i915_drv.h index 48fd82722f12..c88e514728a0
> > 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -619,6 +619,8 @@ IS_SUBPLATFORM(const struct drm_i915_private
> *i915,
> > IS_SUBPLATFORM(dev_priv, INTEL_ALDERLAKE_P,
> INTEL_SUBPLATFORM_N)
> > #define IS_ADLP_RPLP(dev_priv) \
> > IS_SUBPLATFORM(dev_priv, INTEL_ALDERLAKE_P,
> INTEL_SUBPLATFORM_RPL)
> > +#define IS_ADLP_RPLU(dev_priv) \
> > + IS_SUBPLATFORM(dev_priv, INTEL_ALDERLAKE_P,
> INTEL_SUBPLATFORM_RPLU)
> > #define IS_HSW_EARLY_SDV(dev_priv) (IS_HASWELL(dev_priv) && \
> > (INTEL_DEVID(dev_priv) & 0xFF00) ==
> 0x0C00) #define
> > IS_BDW_ULT(dev_priv) \ diff --git a/drivers/gpu/drm/i915/i915_pci.c
> > b/drivers/gpu/drm/i915/i915_pci.c index 6cc65079b18d..e9f3b99b3e00
> > 100644
> > --- a/drivers/gpu/drm/i915/i915_pci.c
> > +++ b/drivers/gpu/drm/i915/i915_pci.c
> > @@ -1234,6 +1234,7 @@ static const struct pci_device_id pciidlist[] = {
> > INTEL_DG1_IDS(&dg1_info),
> > INTEL_RPLS_IDS(&adl_s_info),
> > INTEL_RPLP_IDS(&adl_p_info),
> > + INTEL_RPLU_IDS(&adl_p_info),
>
> You may want to drop this change, see later comment on how and why.
>
> > INTEL_DG2_IDS(&dg2_info),
> > INTEL_ATS_M_IDS(&ats_m_info),
> > INTEL_MTL_IDS(&mtl_info),
> > diff --git a/drivers/gpu/drm/i915/intel_device_info.c
> > b/drivers/gpu/drm/i915/intel_device_info.c
> > index 849baf6c3b3c..fec8bd116436 100644
> > --- a/drivers/gpu/drm/i915/intel_device_info.c
> > +++ b/drivers/gpu/drm/i915/intel_device_info.c
> > @@ -199,6 +199,11 @@ static const u16 subplatform_n_ids[] = { static
> > const u16 subplatform_rpl_ids[] = {
> > INTEL_RPLS_IDS(0),
> > INTEL_RPLP_IDS(0),
> > + INTEL_RPLU_IDS(0)
>
> Please always include the trailing , at the end to make future changes easier.
> (However, you may want to drop this change altogether, see later
> comment.)
>
> > +};
> > +
> > +static const u16 subplatform_rplu_ids[] = {
> > + INTEL_RPLU_IDS(0),
> > };
> >
> > static const u16 subplatform_g10_ids[] = { @@ -268,6 +273,9 @@ static
> > void intel_device_info_subplatform_init(struct drm_i915_private *i915)
> > } else if (find_devid(devid, subplatform_rpl_ids,
> > ARRAY_SIZE(subplatform_rpl_ids))) {
> > mask = BIT(INTEL_SUBPLATFORM_RPL);
> > + if (find_devid(devid, subplatform_rplu_ids,
> > + ARRAY_SIZE(subplatform_rplu_ids)))
> > + mask |= BIT(INTEL_SUBPLATFORM_RPLU);
> > } else if (find_devid(devid, subplatform_g10_ids,
> > ARRAY_SIZE(subplatform_g10_ids))) {
> > mask = BIT(INTEL_SUBPLATFORM_G10);
> > diff --git a/drivers/gpu/drm/i915/intel_device_info.h
> > b/drivers/gpu/drm/i915/intel_device_info.h
> > index d588e5fd2eea..4a5cd337e4b5 100644
> > --- a/drivers/gpu/drm/i915/intel_device_info.h
> > +++ b/drivers/gpu/drm/i915/intel_device_info.h
> > @@ -127,6 +127,8 @@ enum intel_platform {
> > * bit set
> > */
> > #define INTEL_SUBPLATFORM_N 1
> > +/* Sub Platform for RPL-U */
>
> This comment really adds nothing, it's exactly the same as the macro name.
>
Ack.
> > +#define INTEL_SUBPLATFORM_RPLU 2
> >
> > /* MTL */
> > #define INTEL_SUBPLATFORM_M 0
> > diff --git a/include/drm/i915_pciids.h b/include/drm/i915_pciids.h
> > index 4a4c190f7698..758be5fb09a2 100644
> > --- a/include/drm/i915_pciids.h
> > +++ b/include/drm/i915_pciids.h
> > @@ -684,14 +684,17 @@
> > INTEL_VGA_DEVICE(0xA78A, info), \
> > INTEL_VGA_DEVICE(0xA78B, info)
> >
> > +/* RPL-U */
> > +#define INTEL_RPLU_IDS(info) \
> > + INTEL_VGA_DEVICE(0xA721, info), \
> > + INTEL_VGA_DEVICE(0xA7A1, info), \
> > + INTEL_VGA_DEVICE(0xA7A9, info)
> > +
> > /* RPL-P */
> > #define INTEL_RPLP_IDS(info) \
> > INTEL_VGA_DEVICE(0xA720, info), \
> > - INTEL_VGA_DEVICE(0xA721, info), \
> > INTEL_VGA_DEVICE(0xA7A0, info), \
> > - INTEL_VGA_DEVICE(0xA7A1, info), \
> > - INTEL_VGA_DEVICE(0xA7A8, info), \
> > - INTEL_VGA_DEVICE(0xA7A9, info)
> > + INTEL_VGA_DEVICE(0xA7A8, info)
>
> Changing the INTEL_RPLP_IDS impacts arch/x86/kernel/early-quirks.c too. As
> is, this drops the early quirks from RPL-U.
>
Yes I missed the early quirks part in this revision. Thank you Jani for pointing out.
> Your options are 1) modify early-quirks.c too, or 2) include RPL-U ids in RPL-P:
>
> #define INTEL_RPLP_IDS(info) \
> + INTEL_RPLU_IDS(info), \
> - INTEL_VGA_DEVICE(0xA721, info), \
> INTEL_VGA_DEVICE(0xA7A0, info), \
> - INTEL_VGA_DEVICE(0xA7A1, info), \
> - INTEL_VGA_DEVICE(0xA7A8, info), \
> - INTEL_VGA_DEVICE(0xA7A9, info)
> + INTEL_VGA_DEVICE(0xA7A8, info)
>
> With option 2, you also don't need to add INTEL_RPLU_IDS separately to
> subplatform_rpl_ids[] or pciidlist[].
>
> I might lean towards option 2, but no strong opinions.
>
Thank you Jani for your suggestion. I am also inclined to the solution of adding RPLU IDs to RPLP platform.
To summarize, we would add the INTEL_RPLU_IDS(info) into INTEL_RPLP_IDS(info). As Jani pointed out, with this, there is no need to add INTEL_RPLU_IDS separately to
subplatform_rpl_ids[] or pciidlist[]. This also aligns with Bspec(55376) as RPL-U ids are listed under "RPL-P SKUs and Device IDs Info"
@Matt: I remember, we had discussed a similar option in our communications. Do you have any strong opinion against it?
If not I would go ahead with this implementation.
Regards
Chaitanya
>
> BR,
> Jani.
>
>
> >
> > /* DG2 */
> > #define INTEL_DG2_G10_IDS(info) \
>
> --
> Jani Nikula, Intel Open Source Graphics Center
