Intel-GFX-CI is finding a lot of CRC mismatches after one wide filter was made more specific to its case. This issue can be seen on hosts from gen SKL forwards (SKL, KBL, APL, CFL, GLK)

and is found with tests

igt@kms_draw_crc@draw-method-xrgb2101010-render-untiled
igt@kms_draw_crc@draw-method-xrgb2101010-render-xtiled
igt@kms_draw_crc@draw-method-xrgb2101010-render-ytiled
igt@kms_draw_crc@draw-method-xrgb8888-render-untiled
igt@kms_draw_crc@draw-method-xrgb8888-render-xtiled

igt@kms_flip_tiling@flip-to-x-tiled
igt@kms_flip_tiling@flip-to-y-tiled
igt@kms_flip_tiling@flip-x-tiled
igt@kms_flip_tiling@flip-y-tiled

igt@kms_plane@pixel-format-pipe-a-planes

igt@kms_pwrite_crc

Example error output:

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4543/shard-glk3/igt@kms_draw_crc@draw-method-xrgb8888-render-xtiled.html

(kms_draw_crc:1380) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:370:
(kms_draw_crc:1380) igt_debugfs-CRITICAL: Failed assertion: !mismatch
Subtest draw-method-xrgb8888-render-xtiled failed.
**** DEBUG ****
(kms_draw_crc:1380) DEBUG: Test requirement passed: !(method == IGT_DRAW_MMAP_WC && !gem_mmap__has_wc(drm_fd))
(kms_draw_crc:1380) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_draw_crc:1380) ioctl_wrappers-DEBUG: Test requirement passed: has_modifiers
(kms_draw_crc:1380) DEBUG: Test requirement passed: format_is_supported(formats[format_index], tiling)
(kms_draw_crc:1380) igt_fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080, format=0x34325258, tiling=0x0, size=0)
(kms_draw_crc:1380) igt_fb-DEBUG: igt_create_fb_with_bo_size(handle=1, pitch=7680)
(kms_draw_crc:1380) igt_fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080, format=0x34325258, tiling=0x100000000000001, size=0)
(kms_draw_crc:1380) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_draw_crc:1380) igt_fb-DEBUG: igt_create_fb_with_bo_size(handle=1, pitch=7680)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(!rendercopy)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(rect->x % (32 / buf->bpp) != 0 || rect->y % (32 / buf->bpp) != 0 || rect->w % (32 / buf->bpp) != 0 || rect->h % (32 / buf->bpp) != 0)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(!rendercopy)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(rect->x % (32 / buf->bpp) != 0 || rect->y % (32 / buf->bpp) != 0 || rect->w % (32 / buf->bpp) != 0 || rect->h % (32 / buf->bpp) != 0)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(!rendercopy)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(rect->x % (32 / buf->bpp) != 0 || rect->y % (32 / buf->bpp) != 0 || rect->w % (32 / buf->bpp) != 0 || rect->h % (32 / buf->bpp) != 0)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(!rendercopy)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(rect->x % (32 / buf->bpp) != 0 || rect->y % (32 / buf->bpp) != 0 || rect->w % (32 / buf->bpp) != 0 || rect->h % (32 / buf->bpp) != 0)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(!rendercopy)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: !(rect->x % (32 / buf->bpp) != 0 || rect->y % (32 / buf->bpp) != 0 || rect->w % (32 / buf->bpp) != 0 || rect->h % (32 / buf->bpp) != 0)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_draw-DEBUG: Test requirement passed: gem_get_tiling(fd, buf->handle, &tiling, &swizzle)
(kms_draw_crc:1380) igt_debugfs-DEBUG: CRC mismatch at index 0: 0x17128270 != 0x12eca29
(kms_draw_crc:1380) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:370:
(kms_draw_crc:1380) igt_debugfs-CRITICAL: Failed assertion: !mismatch
(kms_draw_crc:1380) igt_core-INFO: Stack trace:
(kms_draw_crc:1380) igt_core-INFO:   #0 [__igt_fail_assert+0x180]
(kms_draw_crc:1380) igt_core-INFO:   #1 [igt_assert_crc_equal+0xba]
(kms_draw_crc:1380) igt_core-INFO:   #2 [draw_method_subtest+0x1df]
(kms_draw_crc:1380) igt_core-INFO:   #3 [__real_main316+0xc7]
(kms_draw_crc:1380) igt_core-INFO:   #4 [main+0x44]
(kms_draw_crc:1380) igt_core-INFO:   #5 [__libc_start_main+0xe7]
(kms_draw_crc:1380) igt_core-INFO:   #6 [_start+0x2a]
****  END  ****