| Message ID | 20230621014257.1769564-1-vinay.belgaumkar@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drm/i915/guc/slpc: Apply min softlimit correctly | expand |
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index 01b75529311c..ee9f83af7cf6 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -606,7 +606,7 @@ static int slpc_set_softlimits(struct intel_guc_slpc *slpc) if (unlikely(ret)) return ret; slpc_to_gt(slpc)->defaults.min_freq = slpc->min_freq_softlimit; - } else if (slpc->min_freq_softlimit != slpc->min_freq) { + } else { return intel_guc_slpc_set_min_freq(slpc, slpc->min_freq_softlimit); }
The scenario being fixed here is depicted in the following sequence- modprobe i915 echo 1 > /sys/class/drm/card0/gt/gt0/slpc_ignore_eff_freq echo 300 > /sys/class/drm/card0/gt_min_freq_mhz (RPn) cat /sys/class/drm/card0/gt_cur_freq_mhz --> cur == RPn as expected echo 1 > /sys/kernel/debug/dri/0/gt0/reset --> reset cat /sys/class/drm/card0/gt_min_freq_mhz --> cached freq is RPn cat /sys/class/drm/card0/gt_cur_freq_mhz --> it's not RPn, but RPe!! When SLPC reinitializes, it sets SLPC min freq to efficient frequency. Even if we disable efficient freq post that, we should restore the cached min freq (via H2G) for it to take effect. v2: Clarify commit message (Ashutosh) Fixes: 95ccf312a1e4 ("drm/i915/guc/slpc: Allow SLPC to use efficient frequency") Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com> --- drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)