From: Ville Syrjälä ville.syrjala@linux.intel.com
commit 3ef8b5e19ead5a79600ea55f9549658281415893 upstream.
Don't just mask off all the PSF GV points when SAGV gets disabled. This should in fact cause the Pcode to reject the request since at least one PSF point must remain enabled at all times.
Cc: stable@vger.kernel.org Cc: Stanislav Lisovskiy stanislav.lisovskiy@intel.com Fixes: 192fbfb76744 ("drm/i915: Implement PSF GV point support") Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220309164948.10671-7-ville.s... Reviewed-by: Stanislav Lisovskiy stanislav.lisovskiy@intel.com (cherry picked from commit 0fed4ddd18f064d2359b430c6e83ee60dd1f49b1) Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_bw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -819,7 +819,8 @@ int intel_bw_atomic_check(struct intel_a * cause. */ if (!intel_can_enable_sagv(dev_priv, new_bw_state)) { - allowed_points = BIT(max_bw_point); + allowed_points &= ADLS_PSF_PT_MASK; + allowed_points |= BIT(max_bw_point); drm_dbg_kms(&dev_priv->drm, "No SAGV, using single QGV point %d\n", max_bw_point); }