SAGV handling is currently broken which can result in system hangs. Add a parameter to disable SAGV, till the SAGV handling is fixed. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104975 Signed-off-by: Azhar Shaikh <azhar.shaikh@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_params.c | 3 +++ drivers/gpu/drm/i915/i915_params.h | 3 ++- drivers/gpu/drm/i915/intel_pm.c | 2 +- 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 08108ce5be21..6aede52240b0 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -167,6 +167,9 @@ struct i915_params i915_modparams __read_mostly = { i915_param_named_unsafe(enable_dp_mst, bool, 0600, "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)"); +i915_param_named_unsafe(disable_sagv, bool, 0600, + "Disable SAGV (default: false)"); + #if IS_ENABLED(CONFIG_DRM_I915_DEBUG) i915_param_named_unsafe(inject_load_failure, uint, 0400, "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 430f5f9d0ff4..ff3c7d5dee2d 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -69,7 +69,8 @@ param(bool, nuclear_pageflip, false) \ param(bool, enable_dp_mst, true) \ param(bool, enable_dpcd_backlight, false) \ - param(bool, enable_gvt, false) + param(bool, enable_gvt, false) \ + param(bool, disable_sagv, false) #define MEMBER(T, member, ...) T member; struct i915_params { diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 21dac6ebc202..0b1a6cbf45aa 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3693,7 +3693,7 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state) int level, latency; int sagv_block_time_us; - if (!intel_has_sagv(dev_priv)) + if (!intel_has_sagv(dev_priv) || i915_modparams.disable_sagv) return false; if (IS_GEN9(dev_priv)) -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
