[Intel-gfx] [PATCH v2] drm/i915/skl: Make sure to allocate mininum sizes in the DDB

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5732
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  282/283              282/283
ILK                                  308/319              308/319
SNB              +1-3              340/346              338/346
IVB              +1-2              378/384              377/384
BYT                                  296/296              296/296
HSW              +1                 421/428              422/428
BDW                                  318/333              318/333
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*SNB  igt_kms_flip_dpms-vs-vblank-race      PASS(3, M22)      DMESG_WARN(1, M22)
 SNB  igt_kms_flip_dpms-vs-vblank-race-interruptible      DMESG_WARN(3, M22)PASS(1, M22)      DMESG_WARN(1, M22)
 SNB  igt_kms_flip_modeset-vs-vblank-race-interruptible      DMESG_WARN(1, M22)PASS(2, M22)      DMESG_WARN(1, M22)
 SNB  igt_kms_pipe_crc_basic_read-crc-pipe-A      DMESG_WARN(1, M22)PASS(4, M22)      PASS(1, M22)
*IVB  igt_gem_pwrite_pread_snooped-copy-performance      PASS(2, M34)      DMESG_WARN(1, M34)
 IVB  igt_gem_storedw_batches_loop_normal      DMESG_WARN(1, M34)PASS(1, M34)      PASS(1, M34)
 IVB  igt_gem_storedw_batches_loop_secure-dispatch      DMESG_WARN(1, M34)PASS(1, M34)      DMESG_WARN(1, M34)
 HSW  igt_gem_storedw_loop_blt      DMESG_WARN(2, M20)PASS(1, M20)      PASS(1, M20)
Note: You need to pay more attention to line start with '*'