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path: root/drivers/gpu/drm/bridge/ti-sn65dsi86.c
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Diffstat (limited to 'drivers/gpu/drm/bridge/ti-sn65dsi86.c')
-rw-r--r--drivers/gpu/drm/bridge/ti-sn65dsi86.c46
1 files changed, 44 insertions, 2 deletions
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index b77a52d05061..0a580957c8cf 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1,9 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * datasheet: http://www.ti.com/lit/ds/symlink/sn65dsi86.pdf
*/
#include <linux/clk.h>
+#include <linux/debugfs.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/iopoll.h>
@@ -90,6 +92,7 @@ struct ti_sn_bridge {
struct drm_dp_aux aux;
struct drm_bridge bridge;
struct drm_connector connector;
+ struct dentry *debugfs;
struct device_node *host_node;
struct mipi_dsi_device *dsi;
struct clk *refclk;
@@ -155,6 +158,42 @@ static const struct dev_pm_ops ti_sn_bridge_pm_ops = {
SET_RUNTIME_PM_OPS(ti_sn_bridge_suspend, ti_sn_bridge_resume, NULL)
};
+static int status_show(struct seq_file *s, void *data)
+{
+ struct ti_sn_bridge *pdata = s->private;
+ unsigned int reg, val;
+
+ seq_puts(s, "STATUS REGISTERS:\n");
+
+ pm_runtime_get_sync(pdata->dev);
+
+ /* IRQ Status Registers, see Table 31 in datasheet */
+ for (reg = 0xf0; reg <= 0xf8; reg++) {
+ regmap_read(pdata->regmap, reg, &val);
+ seq_printf(s, "[0x%02x] = 0x%08x\n", reg, val);
+ }
+
+ pm_runtime_put(pdata->dev);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(status);
+
+static void ti_sn_debugfs_init(struct ti_sn_bridge *pdata)
+{
+ pdata->debugfs = debugfs_create_dir(dev_name(pdata->dev), NULL);
+
+ debugfs_create_file("status", 0600, pdata->debugfs, pdata,
+ &status_fops);
+}
+
+static void ti_sn_debugfs_remove(struct ti_sn_bridge *pdata)
+{
+ debugfs_remove_recursive(pdata->debugfs);
+ pdata->debugfs = NULL;
+}
+
/* Connector funcs */
static struct ti_sn_bridge *
connector_to_ti_sn_bridge(struct drm_connector *connector)
@@ -275,8 +314,7 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge)
/* TODO: setting to 4 lanes always for now */
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
- dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
- MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
/* check if continuous dsi clock is required or not */
pm_runtime_get_sync(pdata->dev);
@@ -731,6 +769,8 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
drm_bridge_add(&pdata->bridge);
+ ti_sn_debugfs_init(pdata);
+
return 0;
}
@@ -741,6 +781,8 @@ static int ti_sn_bridge_remove(struct i2c_client *client)
if (!pdata)
return -EINVAL;
+ ti_sn_debugfs_remove(pdata);
+
of_node_put(pdata->host_node);
pm_runtime_disable(pdata->dev);