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authorDave Airlie <airlied@redhat.com>2021-03-16 09:45:12 +0300
committerDave Airlie <airlied@redhat.com>2021-03-16 10:08:46 +0300
commit51c3b916a4d7e24b4918925965867fdd9bd8dd59 (patch)
tree3257e3e0fda7fbb0fe1425177b0c661db1bfee63 /lib/vsprintf.c
parent1e28eed17697bcf343c6743f0028cc3b5dd88bf0 (diff)
parent762949bb1da78941b25e63f7e952af037eee15a9 (diff)
downloadlinux-51c3b916a4d7e24b4918925965867fdd9bd8dd59.tar.xz
Merge tag 'drm-misc-next-2021-03-03' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next for 5.13: UAPI Changes: Cross-subsystem Changes: Core Changes: - %p4cc printk format modifier - atomic: introduce drm_crtc_commit_wait, rework atomic plane state helpers to take the drm_commit_state structure - dma-buf: heaps rework to return a struct dma_buf - simple-kms: Add plate state helpers - ttm: debugfs support, removal of sysfs Driver Changes: - Convert drivers to shadow plane helpers - arc: Move to drm/tiny - ast: cursor plane reworks - gma500: Remove TTM and medfield support - mxsfb: imx8mm support - panfrost: MMU IRQ handling rework - qxl: rework to better handle resources deallocation, locking - sun4i: Add alpha properties for UI and VI layers - vc4: RPi4 CEC support - vmwgfx: doc cleanup Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20210303100600.dgnkadonzuvfnu22@gilmour
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 41ddc353ebb8..35dcc50532d8 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1734,6 +1734,42 @@ char *netdev_bits(char *buf, char *end, const void *addr,
}
static noinline_for_stack
+char *fourcc_string(char *buf, char *end, const u32 *fourcc,
+ struct printf_spec spec, const char *fmt)
+{
+ char output[sizeof("0123 little-endian (0x01234567)")];
+ char *p = output;
+ unsigned int i;
+ u32 val;
+
+ if (fmt[1] != 'c' || fmt[2] != 'c')
+ return error_string(buf, end, "(%p4?)", spec);
+
+ if (check_pointer(&buf, end, fourcc, spec))
+ return buf;
+
+ val = *fourcc & ~BIT(31);
+
+ for (i = 0; i < sizeof(*fourcc); i++) {
+ unsigned char c = val >> (i * 8);
+
+ /* Print non-control ASCII characters as-is, dot otherwise */
+ *p++ = isascii(c) && isprint(c) ? c : '.';
+ }
+
+ strcpy(p, *fourcc & BIT(31) ? " big-endian" : " little-endian");
+ p += strlen(p);
+
+ *p++ = ' ';
+ *p++ = '(';
+ p = special_hex_number(p, output + sizeof(output) - 2, *fourcc, sizeof(u32));
+ *p++ = ')';
+ *p = '\0';
+
+ return string(buf, end, output, spec);
+}
+
+static noinline_for_stack
char *address_val(char *buf, char *end, const void *addr,
struct printf_spec spec, const char *fmt)
{
@@ -2188,6 +2224,7 @@ early_param("no_hash_pointers", no_hash_pointers_enable);
* correctness of the format string and va_list arguments.
* - 'K' For a kernel pointer that should be hidden from unprivileged users
* - 'NF' For a netdev_features_t
+ * - '4cc' V4L2 or DRM FourCC code, with endianness and raw numerical value.
* - 'h[CDN]' For a variable-length buffer, it prints it as a hex string with
* a certain separator (' ' by default):
* C colon
@@ -2285,6 +2322,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
return restricted_pointer(buf, end, ptr, spec);
case 'N':
return netdev_bits(buf, end, ptr, spec, fmt);
+ case '4':
+ return fourcc_string(buf, end, ptr, spec, fmt);
case 'a':
return address_val(buf, end, ptr, spec, fmt);
case 'd':