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| author | Rob Clark <robdclark@chromium.org> | 2019-07-02 08:44:17 -0700 |
|---|---|---|
| committer | Andrzej Hajda <a.hajda@samsung.com> | 2019-07-04 15:05:36 +0200 |
| commit | 8efb243a5ce89090df1284c91519ccc3b75758da (patch) | |
| tree | 507fa6fc3b3d7e488cc739b6928b284f583f32ca /drivers | |
| parent | 5c27d6078cd69a1ecaa84b83680bdc8d25bbd172 (diff) | |
| download | linux-stable-8efb243a5ce89090df1284c91519ccc3b75758da.tar.gz linux-stable-8efb243a5ce89090df1284c91519ccc3b75758da.tar.bz2 linux-stable-8efb243a5ce89090df1284c91519ccc3b75758da.zip | |
drm/bridge: ti-sn65dsi86: add debugfs
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
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/bridge/ti-sn65dsi86.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index d6afebc2ae25..5411b33b4dc9 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> @@ -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); |