[i-g-t 1/1] drm/i915/display: Dump display parameters to i915_display_capabilities

[i-g-t 1/1] drm/i915/display: Dump display parameters to i915_display_capabilities

[Bhanuprakash Modem]

Include Display parameters in i915_display_capabilities debugfs.

Cc: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_debugfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 6f2d13c8ccf7..1eb296b5c38a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -625,6 +625,10 @@ static int i915_display_capabilities(struct seq_file *m, void *unused)
 	struct drm_i915_private *i915 = node_to_i915(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	kernel_param_lock(THIS_MODULE);
+	intel_display_params_dump(i915, &p);
+	kernel_param_unlock(THIS_MODULE);
+
 	intel_display_device_info_print(DISPLAY_INFO(i915),
 					DISPLAY_RUNTIME_INFO(i915), &p);
 
-- 
2.40.0

Re: [i-g-t 1/1] drm/i915/display: Dump display parameters to i915_display_capabilities

[Jani Nikula]

On Wed, 17 Jan 2024, Bhanuprakash Modem <bhanuprakash.modem@intel.com> wrote:
> Include Display parameters in i915_display_capabilities debugfs.

Maybe remove them from i915_capabilities? What's the point in having
them in two places? (Or three, if you count the actual debugfs interface
to the params!)

>
> Cc: Jouni Högander <jouni.hogander@intel.com>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display_debugfs.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 6f2d13c8ccf7..1eb296b5c38a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -625,6 +625,10 @@ static int i915_display_capabilities(struct seq_file *m, void *unused)
>  	struct drm_i915_private *i915 = node_to_i915(m->private);
>  	struct drm_printer p = drm_seq_file_printer(m);
>  
> +	kernel_param_lock(THIS_MODULE);
> +	intel_display_params_dump(i915, &p);
> +	kernel_param_unlock(THIS_MODULE);

The kernel_param_lock/unlock are just cargo cult from the time these
were actually module parameters. They should be removed from
i915_capabilities as well.

BR,
Jani.

> +
>  	intel_display_device_info_print(DISPLAY_INFO(i915),
>  					DISPLAY_RUNTIME_INFO(i915), &p);

-- 
Jani Nikula, Intel