5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Liu Ying <victor.liu@xxxxxxx>
[ Upstream commit fe828fbd87786238b30f44cafd698d975d956c97 ]
If the bridge is attached with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set,
this driver won't initialize a connector and hence display mode won't be
validated in drm_connector_helper_funcs::mode_valid(). So, move the mode
validation from drm_connector_helper_funcs::mode_valid() to
drm_bridge_funcs::mode_valid(), because the mode validation is always done
for the bridge.
Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
Reviewed-by: Robert Foss <rfoss@xxxxxxxxxx>
Signed-off-by: Robert Foss <rfoss@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240813091637.1054586-1-victor.liu@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/bridge/lontium-lt8912b.c | 35 ++++++++++++------------
1 file changed, 18 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 6379d5c8edff1..9dd52282a055e 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -401,22 +401,6 @@ static const struct drm_connector_funcs lt8912_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
-static enum drm_mode_status
-lt8912_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
-{
- if (mode->clock > 150000)
- return MODE_CLOCK_HIGH;
-
- if (mode->hdisplay > 1920)
- return MODE_BAD_HVALUE;
-
- if (mode->vdisplay > 1080)
- return MODE_BAD_VVALUE;
-
- return MODE_OK;
-}
-
static int lt8912_connector_get_modes(struct drm_connector *connector)
{
struct edid *edid;
@@ -444,7 +428,6 @@ static int lt8912_connector_get_modes(struct drm_connector *connector)
static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = {
.get_modes = lt8912_connector_get_modes,
- .mode_valid = lt8912_connector_mode_valid,
};
static void lt8912_bridge_mode_set(struct drm_bridge *bridge,
@@ -590,6 +573,23 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge)
drm_bridge_hpd_disable(lt->hdmi_port);
}
+static enum drm_mode_status
+lt8912_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->clock > 150000)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->hdisplay > 1920)
+ return MODE_BAD_HVALUE;
+
+ if (mode->vdisplay > 1080)
+ return MODE_BAD_VVALUE;
+
+ return MODE_OK;
+}
+
static enum drm_connector_status
lt8912_bridge_detect(struct drm_bridge *bridge)
{
@@ -620,6 +620,7 @@ static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge,
static const struct drm_bridge_funcs lt8912_bridge_funcs = {
.attach = lt8912_bridge_attach,
.detach = lt8912_bridge_detach,
+ .mode_valid = lt8912_bridge_mode_valid,
.mode_set = lt8912_bridge_mode_set,
.enable = lt8912_bridge_enable,
.detect = lt8912_bridge_detect,
--
2.43.0
