mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-11-22 04:56:15 +00:00
538a1d740c
The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
112 lines
3.6 KiB
Diff
112 lines
3.6 KiB
Diff
From 6da70162dd1e729c04e2dc25472b39390868af79 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
Date: Fri, 20 Sep 2024 12:05:18 +0100
|
|
Subject: [PATCH 1272/1350] drm: vc4: dsi: enable video and then retry failed
|
|
transfers
|
|
|
|
The DSI block appears to be able to come up stuck in a condition where
|
|
it leaves the lanes in HS mode or just jabbering. This stops LP
|
|
transfers from completing as there is no LP time available. This is
|
|
signalled via the LP1 contention error.
|
|
|
|
Enabling video briefly clears that condition, so if we detect the
|
|
error condition, enable video mode and then retry.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_dsi.c | 54 +++++++++++++++++++++++++++++------
|
|
1 file changed, 46 insertions(+), 8 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
|
|
@@ -286,6 +286,8 @@
|
|
DSI1_INT_PR_TO)
|
|
|
|
#define DSI0_STAT 0x2c
|
|
+# define DSI0_STAT_ERR_CONT_LP1 BIT(6)
|
|
+# define DSI0_STAT_ERR_CONT_LP0 BIT(5)
|
|
#define DSI0_HSTX_TO_CNT 0x30
|
|
#define DSI0_LPRX_TO_CNT 0x34
|
|
#define DSI0_TA_TO_CNT 0x38
|
|
@@ -1203,10 +1205,9 @@ static int vc4_dsi_bridge_attach(struct
|
|
&dsi->bridge, flags);
|
|
}
|
|
|
|
-static ssize_t vc4_dsi_host_transfer(struct mipi_dsi_host *host,
|
|
- const struct mipi_dsi_msg *msg)
|
|
+static ssize_t vc4_dsi_transfer(struct vc4_dsi *dsi,
|
|
+ const struct mipi_dsi_msg *msg, bool log_error)
|
|
{
|
|
- struct vc4_dsi *dsi = host_to_dsi(host);
|
|
struct mipi_dsi_packet packet;
|
|
u32 pkth = 0, pktc = 0;
|
|
int i, ret;
|
|
@@ -1315,10 +1316,12 @@ static ssize_t vc4_dsi_host_transfer(str
|
|
DSI_PORT_WRITE(TXPKT1C, pktc);
|
|
|
|
if (!wait_for_completion_timeout(&dsi->xfer_completion,
|
|
- msecs_to_jiffies(1000))) {
|
|
- dev_err(&dsi->pdev->dev, "transfer interrupt wait timeout");
|
|
- dev_err(&dsi->pdev->dev, "instat: 0x%08x\n",
|
|
- DSI_PORT_READ(INT_STAT));
|
|
+ msecs_to_jiffies(500))) {
|
|
+ if (log_error) {
|
|
+ dev_err(&dsi->pdev->dev, "transfer interrupt wait timeout");
|
|
+ dev_err(&dsi->pdev->dev, "instat: 0x%08x, stat: 0x%08x\n",
|
|
+ DSI_PORT_READ(INT_STAT), DSI_PORT_READ(INT_STAT));
|
|
+ }
|
|
ret = -ETIMEDOUT;
|
|
} else {
|
|
ret = dsi->xfer_result;
|
|
@@ -1361,7 +1364,8 @@ static ssize_t vc4_dsi_host_transfer(str
|
|
return ret;
|
|
|
|
reset_fifo_and_return:
|
|
- DRM_ERROR("DSI transfer failed, resetting: %d\n", ret);
|
|
+ if (log_error)
|
|
+ DRM_ERROR("DSI transfer failed, resetting: %d\n", ret);
|
|
|
|
DSI_PORT_WRITE(TXPKT1C, DSI_PORT_READ(TXPKT1C) & ~DSI_TXPKT1C_CMD_EN);
|
|
udelay(1);
|
|
@@ -1374,6 +1378,40 @@ reset_fifo_and_return:
|
|
return ret;
|
|
}
|
|
|
|
+static ssize_t vc4_dsi_host_transfer(struct mipi_dsi_host *host,
|
|
+ const struct mipi_dsi_msg *msg)
|
|
+{
|
|
+ struct vc4_dsi *dsi = host_to_dsi(host);
|
|
+ u32 stat, disp0_ctrl;
|
|
+ int ret;
|
|
+
|
|
+ ret = vc4_dsi_transfer(dsi, msg, false);
|
|
+
|
|
+ if (ret == -ETIMEDOUT) {
|
|
+ stat = DSI_PORT_READ(STAT);
|
|
+ disp0_ctrl = DSI_PORT_READ(DISP0_CTRL);
|
|
+
|
|
+ DSI_PORT_WRITE(STAT, DSI_PORT_BIT(STAT_ERR_CONT_LP1));
|
|
+ if (!(disp0_ctrl & DSI_DISP0_ENABLE)) {
|
|
+ /* If video mode not enabled, then try recovering by
|
|
+ * enabling it briefly to clear FIFOs and the state.
|
|
+ */
|
|
+ disp0_ctrl |= DSI_DISP0_ENABLE;
|
|
+ DSI_PORT_WRITE(DISP0_CTRL, disp0_ctrl);
|
|
+ msleep(30);
|
|
+ disp0_ctrl &= ~DSI_DISP0_ENABLE;
|
|
+ DSI_PORT_WRITE(DISP0_CTRL, disp0_ctrl);
|
|
+ msleep(30);
|
|
+
|
|
+ ret = vc4_dsi_transfer(dsi, msg, true);
|
|
+ } else {
|
|
+ DRM_ERROR("DSI transfer failed whilst in HS mode stat: 0x%08x\n",
|
|
+ stat);
|
|
+ }
|
|
+ }
|
|
+ return ret;
|
|
+}
|
|
+
|
|
static const struct component_ops vc4_dsi_ops;
|
|
static int vc4_dsi_host_attach(struct mipi_dsi_host *host,
|
|
struct mipi_dsi_device *device)
|