[Intel-gfx] [PATCH 8/9] drm/dp: Export AUX_RETRY_INTERVAL

[Dhinakaran Pandiyan]

Drivers can use this in their retry loops too.

Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 12 +++++-------
 include/drm/drm_dp_helper.h     |  2 ++
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index ffe14ec3e7f2..0a7c8d6e7d8c 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -169,8 +169,6 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw)
 }
 EXPORT_SYMBOL(drm_dp_bw_code_to_link_rate);
 
-#define AUX_RETRY_INTERVAL 500 /* us */
-
 /**
  * DOC: dp helpers
  *
@@ -206,8 +204,8 @@ static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request,
 	 */
 	for (retry = 0; retry < 32; retry++) {
 		if (ret != 0 && ret != -ETIMEDOUT) {
-			usleep_range(AUX_RETRY_INTERVAL,
-				     AUX_RETRY_INTERVAL + 100);
+			usleep_range(DP_AUX_RETRY_INTERVAL,
+				     DP_AUX_RETRY_INTERVAL + 100);
 		}
 
 		ret = aux->transfer(aux, &msg);
@@ -718,7 +716,7 @@ static int drm_dp_i2c_retry_count(const struct drm_dp_aux_msg *msg,
 		drm_dp_aux_reply_duration(msg);
 	int i2c_time_us = drm_dp_i2c_msg_duration(msg, i2c_speed_khz);
 
-	return DIV_ROUND_UP(i2c_time_us, aux_time_us + AUX_RETRY_INTERVAL);
+	return DIV_ROUND_UP(i2c_time_us, aux_time_us + DP_AUX_RETRY_INTERVAL);
 }
 
 /*
@@ -795,7 +793,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 			 * For now just defer for long enough to hopefully be
 			 * safe for all use-cases.
 			 */
-			usleep_range(AUX_RETRY_INTERVAL, AUX_RETRY_INTERVAL + 100);
+			usleep_range(DP_AUX_RETRY_INTERVAL, DP_AUX_RETRY_INTERVAL + 100);
 			continue;
 
 		default:
@@ -827,7 +825,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 			aux->i2c_defer_count++;
 			if (defer_i2c < 7)
 				defer_i2c++;
-			usleep_range(AUX_RETRY_INTERVAL, AUX_RETRY_INTERVAL + 100);
+			usleep_range(DP_AUX_RETRY_INTERVAL, DP_AUX_RETRY_INTERVAL + 100);
 			drm_dp_i2c_msg_write_status_update(msg);
 
 			continue;
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index c239e6e24a10..2eae1aed2d26 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -61,6 +61,8 @@
 #define DP_AUX_I2C_REPLY_DEFER		(0x2 << 2)
 #define DP_AUX_I2C_REPLY_MASK		(0x3 << 2)
 
+#define DP_AUX_RETRY_INTERVAL		500 /* us */
+
 /* AUX CH addresses */
 /* DPCD */
 #define DP_DPCD_REV                         0x000
-- 
2.14.1