Re: [Intel-gfx] [PATCH v3 01/13] gpu/drm: make drm_add_edid_modes() consistent when updating connector->display_info

Claudio Suarez
2021-10-19T22:50:08Z

According to the documentation, drm_add_edid_modes
"... Also fills out the &drm_display_info structure and ELD in @connector
with any information which can be derived from the edid."

drm_add_edid_modes accepts a struct edid *edid parameter which may have a
value or may be null. When it is not null, connector->display_info and
connector->eld are updated according to the edid. When edid=NULL, only
connector->eld is reset. Reset connector->display_info to be consistent
and accurate.

Since drm_edid_is_valid() considers NULL as an invalid EDID, simplify the
code to avoid duplicating code in the case of NULL/error.

Signed-off-by: Claudio Suarez <cssk@net-c.es>
---
drivers/gpu/drm/drm_edid.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 6325877c5fd6..a019a26ede7a 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5356,14 +5356,14 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
int num_modes = 0;
u32 quirks;

- if (edid == NULL) {
- clear_eld(connector);
- return 0;
- }
if (!drm_edid_is_valid(edid)) {
+ /* edid == NULL or invalid here */
clear_eld(connector);
- drm_warn(connector->dev, "%s: EDID invalid.\n",
- connector->name);
+ drm_reset_display_info(connector);
+ if (edid)
+ drm_warn(connector->dev,
+ "[CONNECTOR:%d:%s] EDID invalid.\n",
+ connector->base.id, connector->name);
return 0;
}

--
2.33.0