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-rw-r--r--src/intel/isl/isl.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/src/intel/isl/isl.c b/src/intel/isl/isl.c
index 7d1356f0acf..d4a7d00208f 100644
--- a/src/intel/isl/isl.c
+++ b/src/intel/isl/isl.c
@@ -1268,9 +1268,23 @@ isl_calc_row_pitch(const struct isl_device *dev,
const struct isl_extent2d *phys_total_el,
uint32_t *out_row_pitch)
{
- const uint32_t alignment =
+ uint32_t alignment =
isl_calc_row_pitch_alignment(surf_info, tile_info);
+ /* If pitch isn't given and it can be chosen freely, align it by cache line
+ * allowing one to use blit engine on the surface.
+ */
+ if (surf_info->row_pitch == 0 && tile_info->tiling == ISL_TILING_LINEAR) {
+ /* From the Broadwell PRM docs for XY_SRC_COPY_BLT::SourceBaseAddress:
+ *
+ * "Base address of the destination surface: X=0, Y=0. Lower 32bits
+ * of the 48bit addressing. When Src Tiling is enabled (Bit_15
+ * enabled), this address must be 4KB-aligned. When Tiling is not
+ * enabled, this address should be CL (64byte) aligned."
+ */
+ alignment = MAX2(alignment, 64);
+ }
+
const uint32_t min_row_pitch =
isl_calc_min_row_pitch(dev, surf_info, tile_info, phys_total_el,
alignment);