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drm/bridge: ti-sn65dsi86: add debugfs

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Add a debugfs file to show status registers.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190702154419.20812-3-robdclark@gmail.com
This commit is contained in:
Rob Clark 2019-07-02 08:44:17 -07:00 committed by Andrzej Hajda
parent 5c27d6078c
commit 8efb243a5c
1 changed files with 42 additions and 0 deletions
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42
drivers/gpu/drm/bridge/ti-sn65dsi86.c
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@ -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>
@ -91,6 +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;
@ -156,6 +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("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)
@ -732,6 +770,8 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
drm_bridge_add(&pdata->bridge);
ti_sn_debugfs_init(pdata);
return 0;
}
@ -742,6 +782,8 @@ 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);