[PATCH libdrm 2/2] tests/modeprint: Print details for IN_FORMATS blob

[Wladimir J. van der Laan]

Pretty-print formats and modifiers in IN_FORMATS blob.

Signed-off-by: Wladimir J. van der Laan <laa...@gmail.com>
---
 tests/modeprint/modeprint.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/modeprint/modeprint.c b/tests/modeprint/modeprint.c
index 42c0a1b..ce84279 100644
--- a/tests/modeprint/modeprint.c
+++ b/tests/modeprint/modeprint.c
@@ -93,6 +93,28 @@ static int printMode(struct drm_mode_modeinfo *mode)
        return 0;
 }
 
+static int printBlob(const char *name, void *data, uint32_t length)
+{
+       if (!strcmp(name, "IN_FORMATS")) {
+               struct drm_format_modifier_blob *m = data;
+               uint32_t *fmts = (uint32_t *)(((char *)data) + 
m->formats_offset);
+               struct drm_format_modifier *mod = (struct drm_format_modifier 
*)(((char *)data) + m->modifiers_offset);
+               int i,j,k;
+               printf("\tmodifiers    :\n");
+               for (j = 0; j < (int)m->count_modifiers; j++) {
+                       printf("\t\t0x%016" PRIx64, mod[j].modifier);
+                       for (i = 0; i < 64 && (i + mod[j].offset) < 
(int)m->count_formats; i++) {
+                               if (mod[j].formats & (1<<i)) {
+                                       k = i + mod[j].offset;
+                                       printf(" %c%c%c%c", fmts[k] >> 24, 
fmts[k] >> 16, fmts[k] >> 8, fmts[k] >> 0);
+                               }
+                       }
+                       printf("\n");
+               }
+       }
+       return 0;
+}
+
 static int printProperty(int fd, drmModePropertyPtr props, uint64_t value)
 {
        const char *name = NULL;
@@ -120,6 +142,7 @@ static int printProperty(int fd, drmModePropertyPtr props, 
uint64_t value)
                blob = drmModeGetPropertyBlob(fd, value);
                if (blob) {
                        printf("blob is %d length, %08X\n", blob->length, 
*(uint32_t *)blob->data);
+                       printBlob(props->name, blob->data, blob->length);
                        drmModeFreePropertyBlob(blob);
                } else {
                        printf("error getting blob %" PRIu64 "\n", value);
-- 
2.7.4

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