On Wed, 19 Oct 2022 16:37:19 -0700, Ashutosh Dixit wrote: > > From: Badal Nilawar <badal.nilawar@xxxxxxxxx> > > Update CAGF functions for MTL to get actual resolved frequency of 3D and > SAMedia. > > v2: Update MTL_MIRROR_TARGET_WP1 position/formatting (MattR) > Move MTL branches in cagf functions to top (MattR) > Fix commit message (Andi) > v3: Added comment about registers not needing forcewake for Gen12+ and > returning 0 freq in RC6 > v4: Use REG_FIELD_GET and uncore (Rodrigo) > > Bspec: 66300 Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> > > Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> > Signed-off-by: Badal Nilawar <badal.nilawar@xxxxxxxxx> > --- > drivers/gpu/drm/i915/gt/intel_gt_regs.h | 4 ++++ > drivers/gpu/drm/i915/gt/intel_rps.c | 12 ++++++++++-- > 2 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h > index f8c4f758ac0b1..d8dbd0ac3b064 100644 > --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h > +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h > @@ -21,6 +21,10 @@ > */ > #define PERF_REG(offset) _MMIO(offset) > > +/* MTL workpoint reg to get core C state and actual freq of 3D, SAMedia */ > +#define MTL_MIRROR_TARGET_WP1 _MMIO(0xc60) > +#define MTL_CAGF_MASK REG_GENMASK(8, 0) > + > /* RPM unit config (Gen8+) */ > #define RPM_CONFIG0 _MMIO(0xd00) > #define GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT 3 > diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c > index da6b969f554b6..63cc7c538401e 100644 > --- a/drivers/gpu/drm/i915/gt/intel_rps.c > +++ b/drivers/gpu/drm/i915/gt/intel_rps.c > @@ -2093,7 +2093,9 @@ u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat) > struct drm_i915_private *i915 = rps_to_i915(rps); > u32 cagf; > > - if (GRAPHICS_VER(i915) >= 12) > + if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70)) > + cagf = REG_FIELD_GET(MTL_CAGF_MASK, rpstat); > + else if (GRAPHICS_VER(i915) >= 12) > cagf = REG_FIELD_GET(GEN12_CAGF_MASK, rpstat); > else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) > cagf = REG_FIELD_GET(RPE_MASK, rpstat); > @@ -2115,7 +2117,13 @@ static u32 read_cagf(struct intel_rps *rps) > struct intel_uncore *uncore = rps_to_uncore(rps); > u32 freq; > > - if (GRAPHICS_VER(i915) >= 12) { > + /* > + * For Gen12+ reading freq from HW does not need a forcewake and > + * registers will return 0 freq when GT is in RC6 > + */ > + if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70)) { > + freq = intel_uncore_read(uncore, MTL_MIRROR_TARGET_WP1); > + } else if (GRAPHICS_VER(i915) >= 12) { > freq = intel_uncore_read(uncore, GEN12_RPSTAT1); > } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) { > vlv_punit_get(i915); > -- > 2.38.0 >