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drm/edid: Add drm_edid_get_monitor_name() 

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.

v3: Minor changes suggested by Jani + rebase.

v4: Few more minor changes suggested by Jani + rebase.

cc: dri-devel@lists.freedesktop.org
cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460654317-31288-1-git-send-email-jim.bride@linux.intel.com
hifive-unleashed-5.1
Jim Bride 2016-04-14 10:18:35 -07:00 committed by Daniel Vetter
parent 346fea63a8
commit 59f7c0fa32
2 changed files with 44 additions and 9 deletions
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51
drivers/gpu/drm/drm_edid.c
View File

@ -3293,6 +3293,46 @@ 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 14 chars.)
*
*/
void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
{
int name_length;
char buf[13];
if (bufsize <= 0)
return;
name_length = min(get_monitor_name(edid, buf), bufsize - 1);
memcpy(name, buf, name_length);
name[name_length] = '\0';
}
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 +3346,6 @@ 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 +3359,8 @@ 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);

2
include/drm/drm_crtc.h
View File

@ -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]);