diff options
| author | Peter Collingbourne <pcc@google.com> | 2021-11-17 05:07:24 +0300 |
|---|---|---|
| committer | Robert Foss <robert.foss@linaro.org> | 2021-11-30 15:03:04 +0300 |
| commit | 19cf41b64e3b150cf64fa01dec13f20dc86d95b2 (patch) | |
| tree | 9775f3294f5f457e5b1c72b9a7b07df27a3b7916 /drivers/gpu/drm/bridge | |
| parent | 09717af7d13d63df141ae6e71686289989d17efd (diff) | |
| download | linux-19cf41b64e3b150cf64fa01dec13f20dc86d95b2.tar.xz | |
lontium-lt9611: check a different register bit for HDMI sensing
It has been observed that with certain monitors such as the HP Z27n,
the register 0x825e reads a value of 0x79 when the HDMI cable is
connected and 0x78 when it is disconnected, i.e. bit 0 appears
to correspond to the HDMI connection status and bit 2 is never
set. Therefore, change the driver to check bit 0 instead of bit 2.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/I7e76411127e1ce4988a3f6d0c8ba5f1c3d880c23
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117020724.2647769-1-pcc@google.com
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/lontium-lt9611.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index d2f45a0f79c8..dafb1b47c15f 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -586,7 +586,7 @@ lt9611_connector_detect(struct drm_connector *connector, bool force) int connected = 0; regmap_read(lt9611->regmap, 0x825e, ®_val); - connected = (reg_val & BIT(2)); + connected = (reg_val & BIT(0)); lt9611->status = connected ? connector_status_connected : connector_status_disconnected; @@ -892,7 +892,7 @@ static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) int connected; regmap_read(lt9611->regmap, 0x825e, ®_val); - connected = reg_val & BIT(2); + connected = reg_val & BIT(0); lt9611->status = connected ? connector_status_connected : connector_status_disconnected; |