We need to inform PCODE of a desired ring frequencies so PCODE update the memory frequencies to us. rps->min_freq and rps->max_freq are the frequencies used in that request. However they were unset when SLPC was enabled and PCODE never updated the memory freq. v2 (as Suggested by Ashutosh): if SLPC is in use, let's pick the right frequencies from the get_ia_constants instead of the fake init of rps' min and max. Fixes: 7ba79a671568 ("drm/i915/guc/slpc: Gate Host RPS when SLPC is enabled") Cc: <stable@xxxxxxxxxxxxxxx> # v5.15+ Cc: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> Tested-by: Sushma Venkatesh Reddy <sushma.venkatesh.reddy@xxxxxxxxx> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/gt/intel_llc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_llc.c b/drivers/gpu/drm/i915/gt/intel_llc.c index 14fe65812e42..766f9526da99 100644 --- a/drivers/gpu/drm/i915/gt/intel_llc.c +++ b/drivers/gpu/drm/i915/gt/intel_llc.c @@ -49,6 +49,7 @@ static unsigned int cpu_max_MHz(void) static bool get_ia_constants(struct intel_llc *llc, struct ia_constants *consts) { + struct intel_guc_slpc *slpc = &llc_to_gt(llc)->uc.guc.slpc; struct drm_i915_private *i915 = llc_to_gt(llc)->i915; struct intel_rps *rps = &llc_to_gt(llc)->rps; @@ -65,8 +66,13 @@ static bool get_ia_constants(struct intel_llc *llc, /* convert DDR frequency from units of 266.6MHz to bandwidth */ consts->min_ring_freq = mult_frac(consts->min_ring_freq, 8, 3); - consts->min_gpu_freq = rps->min_freq; - consts->max_gpu_freq = rps->max_freq; + if (intel_uc_uses_guc_slpc(&llc_to_gt(llc)->uc)) { + consts->min_gpu_freq = slpc->min_freq; + consts->max_gpu_freq = slpc->rp0_freq; + } else { + consts->min_gpu_freq = rps->min_freq; + consts->max_gpu_freq = rps->max_freq; + } if (GRAPHICS_VER(i915) >= 9) { /* Convert GT frequency to 50 HZ units */ consts->min_gpu_freq /= GEN9_FREQ_SCALER; -- 2.37.1