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drm/xe/guc: Prepare to print group KLVs

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Some future KLVs will be encoded as a group of nested KLVs. Prepare
our KLV printer function to handle such KLVs. List of known group
keys will be updated later, for now just prepare it for testing.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patch.msgid.link/20260707220816.677-3-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2026-07-11 16:15:20 +02:00
parent 2245d3d1a6
commit 961826fbcd
1 changed files with 18 additions and 0 deletions
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drivers/gpu/drm/xe/xe_guc_klv_helpers.c
+18
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@@ -4,6 +4,7 @@
*/
#include <linux/bitfield.h>
#include <kunit/static_stub.h>
#include <drm/drm_print.h>
#include "abi/guc_klvs_abi.h"
@@ -12,6 +13,12 @@
#define make_u64(hi, lo) ((u64)((u64)(u32)(hi) << 32 | (u32)(lo)))
static bool is_group_key(u16 key)
{
KUNIT_STATIC_STUB_REDIRECT(is_group_key, key);
return false;
}
/**
* xe_guc_klv_key_to_string - Convert KLV key into friendly name.
* @key: the `GuC KLV`_ key
@@ -91,6 +98,17 @@ void xe_guc_klv_print_one(u16 key, u16 len, const u32 *value, struct drm_printer
{
const char *name = xe_guc_klv_key_to_string(key);
if (is_group_key(key)) {
struct drm_printer gp = drm_line_printer(p, name, 0);
drm_printf(p, "{ key %#06x : group %u dwords } # %s\n",
key, len, name);
/* print group recursively */
xe_guc_klv_print(value, len, &gp);
return;
}
switch (len) {
case 0:
drm_printf(p, "{ key %#06x : no value } # %s\n", key, name);