diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-01-18 11:16:47 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-01-18 17:27:05 +0300 |
| commit | a7790f6bd38f3642b60ae3504a2c749135b89451 (patch) | |
| tree | 060410ac152abf8a98dc273b80581784bfc79502 /drivers | |
| parent | ae2d329f104b75a0a78dcaded29fe6283289cdf9 (diff) | |
| download | linux-a7790f6bd38f3642b60ae3504a2c749135b89451.tar.xz | |
drm/bridge: lt9611: fix HPD reenablement
The driver will reset the bridge in the atomic_pre_enable(). However
this will also drop the HPD interrupt state. Instead of resetting the
bridge, properly wake it up. This fixes the HPD interrupt delivery after
the disable/enable cycle.
Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-3-dmitry.baryshkov@linaro.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/bridge/lontium-lt9611.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index 95a962e62ae4..fc5869116cdb 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -857,12 +857,18 @@ static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) { struct lt9611 *lt9611 = bridge_to_lt9611(bridge); + static const struct reg_sequence reg_cfg[] = { + { 0x8102, 0x12 }, + { 0x8123, 0x40 }, + { 0x8130, 0xea }, + { 0x8011, 0xfa }, + }; if (!lt9611->sleep) return; - lt9611_reset(lt9611); - regmap_write(lt9611->regmap, 0x80ee, 0x01); + regmap_multi_reg_write(lt9611->regmap, + reg_cfg, ARRAY_SIZE(reg_cfg)); lt9611->sleep = false; } |