On Thu, 07 Apr 2016, Jim Bride jim.bride@linux.intel.com wrote:
In order to include monitor name information in debugfs output we needed to add a function that would extract the monitor name from the EDID, and that function needed to reside in the file where the rest of the EDID helper functions are implemented.
v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld() use a common helper function to extract the monitor name from the edid. [Jani] + rebase.
cc: dri-devel@lists.freedesktop.org Signed-off-by: Jim Bride jim.bride@linux.intel.com
drivers/gpu/drm/drm_edid.c | 50 +++++++++++++++++++++++++++++++++++++--------- include/drm/drm_crtc.h | 2 ++ 2 files changed, 43 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 558ef9f..daf53df 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3293,6 +3293,45 @@ monitor_name(struct detailed_timing *t, void *data) *(u8 **)data = t->data.other_data.data.str.str; }
+static int get_monitor_name(struct edid *edid, char name[13]) +{
- char *edid_name = NULL;
- int mnl;
- if (!edid || !name)
return 0;- drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
- for (mnl = 0; edid_name && mnl < 13; mnl++) {
if (edid_name[mnl] == 0x0a)break;name[mnl] = edid_name[mnl];- }
- return mnl;
+}
+/**
- drm_edid_get_monitor_name - fetch the monitor name from the edid
- @edid: monitor EDID information
- @name: pointer to a character array to hold the name of the monitor
- @bufsize: The size of the name buffer (should be at least 13 chars.)
- */
+void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize) +{
- int name_length = -1;
- if (bufsize < 13)
return;- name_length = get_monitor_name(edid, name);
- if (name_length)
name[name_length] = '\0';
I was thinking something along the lines of:
char buf[13]; int len;
if (bufsize <= 0) return;
len = min(get_monitor_name(edid, buf), bufsize - 1); memcpy(name, buf, len); name[len] = '\0';
BR, Jani.
+} +EXPORT_SYMBOL(drm_edid_get_monitor_name);
/**
- drm_edid_to_eld - build ELD from EDID
- @connector: connector corresponding to the HDMI/DP sink
@@ -3306,7 +3345,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) { uint8_t *eld = connector->eld; u8 *cea;
- u8 *name; u8 *db; int total_sad_count = 0; int mnl;
@@ -3320,14 +3358,8 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) return; }
- name = NULL;
- drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
- /* max: 13 bytes EDID, 16 bytes ELD */
- for (mnl = 0; name && mnl < 13; mnl++) {
if (name[mnl] == 0x0a)break;eld[20 + mnl] = name[mnl];- }
- mnl = get_monitor_name(edid, eld + 20);
- eld[4] = (cea[1] << 5) | mnl; DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 8cb377c..6d46842 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -2500,6 +2500,8 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid); extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid, bool *edid_corrupt); extern bool drm_edid_is_valid(struct edid *edid); +extern void drm_edid_get_monitor_name(struct edid *edid, char *name,
int buflen);extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, char topology[8]);