drm/i915/bdw: Enable execlists by default where supported

Execlist support in the i915 driver is now considered good enough for the
feature to be enabled by default on Gen8 and later and routinely tested.
Adjusted i915 parameters structure initialization to reflect this and updated
the comment in intel_sanitize_enable_execlists().

There's still work to do before we can let the wider massive onto it,
but there's still time left before the 3.20 cutoff.

v2: Update the MODULE_PARM_DESC too.

Issue: VIZ-2020
Signed-off-by: Thomas Daniel <thomas.daniel@intel.com>
[danvet: Add note that there's still some work left to do.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index c91cb2033cc5ec02c248b95271fac95469e1acde..f6af6d4c775cb05ab562dd6f10599bdba0a1bb5c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -35,7 +35,7 @@ struct i915_params i915 __read_mostly = {
        .vbt_sdvo_panel_type = -1,
        .enable_rc6 = -1,
        .enable_fbc = -1,
-       .enable_execlists = 0,
+       .enable_execlists = -1,
        .enable_hangcheck = true,
        .enable_ppgtt = -1,
        .enable_psr = 0,
@@ -122,7 +122,7 @@ MODULE_PARM_DESC(enable_ppgtt,
 module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
 MODULE_PARM_DESC(enable_execlists,
        "Override execlists usage. "
-       "(-1=auto, 0=disabled [default], 1=enabled)");
+       "(-1=auto [default], 0=disabled, 1=enabled)");
 
 module_param_named(enable_psr, i915.enable_psr, int, 0600);
 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 89b5577afe71ed682e013b927091a790e3115b98..4dc6d4263f3d339cc55c2f4f753f8d43f61fbfe1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -212,8 +212,7 @@ static int intel_lr_context_pin(struct intel_engine_cs *ring,
  * @enable_execlists: value of i915.enable_execlists module parameter.
  *
  * Only certain platforms support Execlists (the prerequisites being
- * support for Logical Ring Contexts and Aliasing PPGTT or better),
- * and only when enabled via module parameter.
+ * support for Logical Ring Contexts and Aliasing PPGTT or better).
  *
  * Return: 1 if Execlists is supported and has to be enabled.
  */