diff options
| author | Damon Ding <damon.ding@rock-chips.com> | 2025-03-10 18:41:08 +0800 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> | 2025-04-21 01:27:10 +0300 |
| commit | c8f0b7cb01eadef03558b21245357683409da438 (patch) | |
| tree | fdf191c0e3b2b21b2e4718e773f30be4ce544709 /drivers/gpu/drm/bridge | |
| parent | drm/bridge: analogix_dp: Add support to get panel from the DP AUX bus (diff) | |
| download | linux-c8f0b7cb01eadef03558b21245357683409da438.tar.gz linux-c8f0b7cb01eadef03558b21245357683409da438.zip | |
drm/bridge: analogix_dp: Add support for &drm_dp_aux.wait_hpd_asserted()
Add analogix_dpaux_wait_hpd_asserted() to help confirm the HPD state
before doing AUX transfers.
Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20250310104114.2608063-8-damon.ding@rock-chips.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 84ad34f71244..ab73e1a82b15 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1540,6 +1540,26 @@ out: return ret; } +static int analogix_dpaux_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us) +{ + struct analogix_dp_device *dp = to_dp(aux); + int val; + int ret; + + if (dp->force_hpd) + return 0; + + pm_runtime_get_sync(dp->dev); + + ret = readx_poll_timeout(analogix_dp_get_plug_in_status, dp, val, !val, + wait_us / 100, wait_us); + + pm_runtime_mark_last_busy(dp->dev); + pm_runtime_put_autosuspend(dp->dev); + + return ret; +} + struct analogix_dp_device * analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data) { @@ -1648,6 +1668,7 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data) dp->aux.name = "DP-AUX"; dp->aux.transfer = analogix_dpaux_transfer; + dp->aux.wait_hpd_asserted = analogix_dpaux_wait_hpd_asserted; dp->aux.dev = dp->dev; drm_dp_aux_init(&dp->aux); |