@@ -67,9 +67,27 @@
static int crc_control_show(struct seq_file *m, void *data)
{
struct drm_crtc *crtc = m->private;
+ size_t count;
+
+ if (crtc->funcs->get_crc_sources) {
+ const char *const *sources = crtc->funcs->get_crc_sources(crtc,
+ &count);
+ size_t values_cnt;
+ int i;
+
+ if (count <= 0 || !sources)
+ goto out;
+
+ seq_puts(m, "[");
+ for (i = 0; i < count; i++)
+ if (!crtc->funcs->verify_crc_source(crtc, sources[i],
+ &values_cnt))
+ seq_printf(m, "%s ", sources[i]);
+ seq_puts(m, "] ");
+ }
+out:
seq_printf(m, "%s\n", crtc->crc.source);
-
return 0;
}
@@ -690,6 +690,22 @@ struct drm_crtc_funcs {
* 0 on success or a negative error code on failure.
*/
int (*pre_crc_read)(struct drm_crtc *crtc);
+ /**
+ * @get_crc_sources:
+ *
+ * Driver callback for getting a list of all the available sources for
+ * CRC generation.
+ *
+ * This callback is optional if the driver does not support exporting of
+ * possible CRC sources list. CRC-core does the verification of sources.
+ *
+ * RETURNS:
+ *
+ * a constant character pointer to the list of all the available CRC
+ * sources
+ */
+ const char *const *(*get_crc_sources)(struct drm_crtc *crtc,
+ size_t *count);
/**
* @atomic_print_state:
This patch implements a callback function "get_crc_sources" which will be called during read of control node. It is an optional callback function and if driver implements this callback, driver should print list of available CRC sources in seq_file privided as an input to the callback. Changes Since V1: (Daniel) - return const pointer to an array of crc sources list - do validation of sources in CRC-core Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com> Cc: dri-devel@lists.freedesktop.org --- drivers/gpu/drm/drm_debugfs_crc.c | 20 +++++++++++++++++++- include/drm/drm_crtc.h | 16 ++++++++++++++++ 2 files changed, 35 insertions(+), 1 deletion(-)