[PATCH] drm/i915/lspcon: do not hardcode settle timeout

[Giedrius Statkevičius <giedriuswork@xxxxxxxxx>]

Avoid hardcoding the LSPCON settle timeout because it takes a longer
time on certain chips made by certain vendors. Use the function that
already exists to determine the timeout.

Signed-off-by: Giedrius Statkevičius <giedriuswork@xxxxxxxxx>
---
 drivers/gpu/drm/display/drm_dp_dual_mode_helper.c | 3 +--
 drivers/gpu/drm/i915/display/intel_lspcon.c       | 2 +-
 include/drm/display/drm_dp_dual_mode_helper.h     | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dp_dual_mode_helper.c b/drivers/gpu/drm/display/drm_dp_dual_mode_helper.c
index 14a2a8473682..ae9d6b93136b 100644
--- a/drivers/gpu/drm/display/drm_dp_dual_mode_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_dual_mode_helper.c
@@ -491,11 +491,10 @@ EXPORT_SYMBOL(drm_lspcon_get_mode);
  * 0 on success, -error on failure/timeout
  */
 int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
-			enum drm_lspcon_mode mode)
+			enum drm_lspcon_mode mode, int time_out)
 {
 	u8 data = 0;
 	int ret;
-	int time_out = 200;
 	enum drm_lspcon_mode current_mode;
 
 	if (mode == DRM_LSPCON_MODE_PCON)
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index f9db867fae89..764cf4898364 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -211,7 +211,7 @@ static int lspcon_change_mode(struct intel_lspcon *lspcon,
 		return 0;
 	}
 
-	err = drm_lspcon_set_mode(intel_dp->aux.drm_dev, ddc, mode);
+	err = drm_lspcon_set_mode(intel_dp->aux.drm_dev, ddc, mode, lspcon_get_mode_settle_timeout(lspcon));
 	if (err < 0) {
 		drm_err(display->drm, "LSPCON mode change failed\n");
 		return err;
diff --git a/include/drm/display/drm_dp_dual_mode_helper.h b/include/drm/display/drm_dp_dual_mode_helper.h
index 7ee482265087..7ac6969db935 100644
--- a/include/drm/display/drm_dp_dual_mode_helper.h
+++ b/include/drm/display/drm_dp_dual_mode_helper.h
@@ -117,5 +117,5 @@ const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
 int drm_lspcon_get_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
 			enum drm_lspcon_mode *current_mode);
 int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
-			enum drm_lspcon_mode reqd_mode);
+			enum drm_lspcon_mode reqd_mode, int time_out);
 #endif
-- 
2.47.0