On 02.07.2019 17:44, Rob Clark wrote:
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> Add a debugfs file to show status registers.
>
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
> ---
> 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);
If some day we will have board with two such bridges there will be a
problem.
Anyway:
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
--
Regards
Andrzej
> +
> + 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);
