RE: [PATCH] UPSTREAM: drm/bridge: it6505: fix hibernate to resume no display issue

[<kuro.chung@ite.com.tw>]

Hi Pin-yen, 

		I want to upload the patch to let the patch could be review on website, https://chromium-review.googlesource.com/dashboard/self
		But the message ' No Contributor Agreement on file for user Allen Chen ' seems no longer have Permissions for this file, right?
		It have an issue need to update the ite-it6505.c, 	Could you give me some advising?
		Thank you very much.

BR Kuro Chung
ite@ite-XPS-13-9360:~/project/it6505/google/source/cros/src/third_party/kernel/v5.15$ git push cros HEAD:refs/for/chromeos-5.15
remote: PERMISSION_DENIED: The caller does not have permission
remote: [type.googleapis.com/google.rpc.LocalizedMessage]
remote: locale: "en-US"
remote: message: "No Contributor Agreement on file for user Allen Chen <allen.chen@ite.corp-partner.google.com> (id=1321515)"
remote:
remote: [type.googleapis.com/google.rpc.RequestInfo]
remote: request_id: "3c171f2fe78e458ebbb2990bab93cfb3"
remote:
remote: [type.googleapis.com/google.rpc.RequestInfo]
remote: request_id: "c5662672e00f42e1b6562149270c7864"
fatal: unable to access 'https://chromium.googlesource.com/chromiumos/third_party/kernel/': The requested URL returned error: 403

BR Kuro Chung

-----Original Message-----
From: Kuro Chung (鐘仕廷) <kuro.chung@ite.com.tw> 
Sent: Tuesday, February 6, 2024 11:19 AM
Cc: Allen Chen <allen.chen@ite.com.tw>; Pin-yen Lin <treapking@chromium.org>; Kuro Chung (鐘仕廷) <kuro.chung@ite.com.tw>; Kenneth Hung (洪家倫) <Kenneth.Hung@ite.com.tw>; Andrzej Hajda <a.hajda@samsung.com>; Neil Armstrong <narmstrong@baylibre.com>; Robert Foss <robert.foss@linaro.org>; Laurent Pinchart <Laurent.pinchart@ideasonboard.com>; Jonas Karlman <jonas@kwiboo.se>; Jernej Skrabec <jernej.skrabec@gmail.com>; David Airlie <airlied@gmail.com>; Daniel Vetter <daniel@ffwll.ch>; open list:DRM DRIVERS <dri-devel@lists.freedesktop.org>; open list <linux-kernel@vger.kernel.org>
Subject: [PATCH] UPSTREAM: drm/bridge: it6505: fix hibernate to resume no display issue

From: allen chen <allen.chen@ite.com.tw>

Change-Id: Iaa3cd9da92a625496f579d87d0ab74ca9c4937c4
---
 drivers/gpu/drm/bridge/ite-it6505.c | 42 ++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index b53da9bb65a1..07883001e6ca 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -1318,6 +1318,8 @@ static void it6505_video_reset(struct it6505 *it6505)
 	it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, EN_VID_MUTE);
 	it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_VID_CTRL_PKT, 0x00);
 	it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, VIDEO_RESET);
+	it6505_set_bits(it6505, REG_VID_BUS_CTRL1, TX_FIFO_RESET, 0x02);
+	it6505_set_bits(it6505, REG_VID_BUS_CTRL1, TX_FIFO_RESET, 0x00);
 	it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, RST_501_FIFO);
 	it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, 0x00);
 	it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, 0x00); @@ -2480,10 +2482,6 @@ static void it6505_irq_video_fifo_error(struct it6505 *it6505)
 	struct device *dev = &it6505->client->dev;
 
 	DRM_DEV_DEBUG_DRIVER(dev, "video fifo overflow interrupt");
-	it6505->auto_train_retry = AUTO_TRAIN_RETRY;
-	flush_work(&it6505->link_works);
-	it6505_stop_hdcp(it6505);
-	it6505_video_reset(it6505);
 }
 
 static void it6505_irq_io_latch_fifo_overflow(struct it6505 *it6505) @@ -2491,10 +2489,6 @@ static void it6505_irq_io_latch_fifo_overflow(struct it6505 *it6505)
 	struct device *dev = &it6505->client->dev;
 
 	DRM_DEV_DEBUG_DRIVER(dev, "IO latch fifo overflow interrupt");
-	it6505->auto_train_retry = AUTO_TRAIN_RETRY;
-	flush_work(&it6505->link_works);
-	it6505_stop_hdcp(it6505);
-	it6505_video_reset(it6505);
 }
 
 static bool it6505_test_bit(unsigned int bit, const unsigned int *addr) @@ -2522,7 +2516,7 @@ static irqreturn_t it6505_int_threaded_handler(int unused, void *data)
 		{ BIT_INT_VID_FIFO_ERROR, it6505_irq_video_fifo_error },
 		{ BIT_INT_IO_FIFO_OVERFLOW, it6505_irq_io_latch_fifo_overflow },
 	};
-	int int_status[3], i;
+	int int_status[3], i, reg_0d;
 
 	if (it6505->enable_drv_hold || !it6505->powered)
 		return IRQ_HANDLED;
@@ -2550,6 +2544,36 @@ static irqreturn_t it6505_int_threaded_handler(int unused, void *data)
 			if (it6505_test_bit(irq_vec[i].bit, (unsigned int *)int_status))
 				irq_vec[i].handler(it6505);
 		}
+
+		if ((it6505_test_bit(irq_vec[9].bit, (unsigned int *)int_status)) ||
+			(it6505_test_bit(irq_vec[10].bit, (unsigned int *)int_status))) {
+			it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+			flush_work(&it6505->link_works);
+			it6505_stop_hdcp(it6505);
+			it6505_video_reset(it6505);
+
+			DRM_DEV_DEBUG_DRIVER(dev, "Video Error reset wait video...");
+
+			for (i = 0; i < 10; i++) {
+				usleep_range(10000, 11000);
+				int_status[2] = it6505_read(it6505, INT_STATUS_03);
+				reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
+				it6505_write(it6505, INT_STATUS_03, int_status[2]);
+
+				DRM_DEV_DEBUG_DRIVER(dev, "reg08 = 0x%02x", int_status[2]);
+				DRM_DEV_DEBUG_DRIVER(dev, "reg0D = 0x%02x", reg_0d);
+				if ((reg_0d & VIDEO_STB) && (reg_0d >= 0))
+					break;
+
+				if ((it6505_test_bit(irq_vec[9].bit, (unsigned int *)int_status)) || (it6505_test_bit(irq_vec[10].bit, (unsigned int *)int_status))) {
+					it6505_video_reset(it6505);
+					DRM_DEV_DEBUG_DRIVER(dev, "Video Error reset wait video (%d)", i);
+				}
+
+			}
+
+		}
+
 	}
 
 	pm_runtime_put_sync(dev);
--
2.25.1