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[v3,16/25] drm/bridge/sii8620: add delay during cbus reset

Message ID 1485935272-17337-17-git-send-email-a.hajda@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andrzej Hajda Feb. 1, 2017, 7:47 a.m. UTC 
Without delay CBUS sometimes was not reset properly.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/bridge/sil-sii8620.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index e84cda0..6ef1a4d 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -891,11 +891,10 @@  static void sii8620_hw_reset(struct sii8620 *ctx)
 
 static void sii8620_cbus_reset(struct sii8620 *ctx)
 {
-	sii8620_write_seq_static(ctx,
-		REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
-			| BIT_PWD_SRST_CBUS_RST_SW_EN,
-		REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN
-	);
+	sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
+		      | BIT_PWD_SRST_CBUS_RST_SW_EN);
+	usleep_range(10000, 20000);
+	sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN);
 }
 
 static void sii8620_set_auto_zone(struct sii8620 *ctx)