minigbm: add buffer bandwidth compression flag to gbm device
Read MINIGBM_DEBUG env var when creating a gbm driver
Store value as a flag inside driver
Avoid allocating compressed buffers in the backends
when the flag disables compression
BUG=b:172215587
Change-Id: Idbd6f0aebc1782c1bf5921a6438310a87212d1f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2535658
Tested-by: Pilar Molina Lopez <pmolinalopez@google.com>
Commit-Queue: Pilar Molina Lopez <pmolinalopez@google.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@chromium.org>
diff --git a/drv.c b/drv.c
index 10e8f8d..233cce7 100644
--- a/drv.c
+++ b/drv.c
@@ -128,6 +128,10 @@
if (!drv)
return NULL;
+ char *minigbm_debug;
+ minigbm_debug = getenv("MINIGBM_DEBUG");
+ drv->compression = (minigbm_debug == NULL) || (strcmp(minigbm_debug, "nocompression") != 0);
+
drv->fd = fd;
drv->backend = drv_get_backend(fd);