From: Rob Clark <robdcl...@chromium.org>
Add a debugfs file to show status registers.
Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
drivers/gpu/drm/bridge/ti-sn65dsi86.c | 42 +++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index f1a2493b86d9..a6f27648c015 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -5,6 +5,7 @@
*/
#include <linux/clk.h>
+#include <linux/debugfs.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/iopoll.h>
@@ -109,6 +110,7 @@ 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;
@@ -178,6 +180,42 @@ 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("ti_sn65dsi86", 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)
@@ -869,6 +907,8 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
drm_bridge_add(&pdata->bridge);
+ ti_sn_debugfs_init(pdata);
+
return 0;
}
@@ -879,6 +919,8 @@ 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);
--
2.20.1
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