virgl: introduce $VIRGL_DEBUG=verbose

This adds an environment-varaible that can be used for driver-specific
flags, as well as a flag for it to enable verbose output.

While we're at it, quiet some overly chatty debug-output by default.

Signed-off-by: Erik Faye-Lund <[email protected]>
Reviewed-By: Gert Wollny <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gallium/drivers/virgl/virgl_encode.c b/src/gallium/drivers/virgl/virgl_encode.c
index d56484e0dd0..a13c3982ec3 100644
--- a/src/gallium/drivers/virgl/virgl_encode.c
+++ b/src/gallium/drivers/virgl/virgl_encode.c
@@ -261,7 +261,8 @@ int virgl_encode_shader_state(struct virgl_context *ctx,
 
       bret = tgsi_dump_str(tokens, TGSI_DUMP_FLOAT_AS_HEX, str, str_total_size);
       if (bret == false) {
-         debug_printf("Failed to translate shader in available space - trying again\n");
+         if (virgl_debug & VIRGL_DEBUG_VERBOSE)
+            debug_printf("Failed to translate shader in available space - trying again\n");
          old_size = str_total_size;
          str_total_size = 65536 * ++retry_size;
          str = REALLOC(str, old_size, str_total_size);