From: Ville Syrjälä <ville.syrj...@linux.intel.com>
The code managing the dbuf slices is borked and needs some
real work to fix. In the meantime let's just stop using the
second slice.
v2: Drop the change to intel_enabled_dbuf_slices_num() (Mahesh)
Cc: Mahesh Kumar <mahesh1.sh.ku...@gmail.com>
Reviewed-by: Imre Deak <imre.d...@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 53b706154c94..ed9786241307 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3822,8 +3822,13 @@ static u16 intel_get_ddb_size(struct drm_i915_private
*dev_priv,
/*
* 12GB/s is maximum BW supported by single DBuf slice.
+ *
+ * FIXME dbuf slice code is broken:
+ * - must wait for planes to stop using the slice before powering it off
+ * - plane straddling both slices is illegal in multi-pipe scenarios
+ * - should validate we stay within the hw bandwidth limits
*/
- if (num_active > 1 || total_data_bw >= GBps(12)) {
+ if (0 && (num_active > 1 || total_data_bw >= GBps(12))) {
ddb->enabled_slices = 2;
} else {
ddb->enabled_slices = 1;
--
2.19.2
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