Hi Bhanu,
Thanks for the patch, functionality wise looks good. Have you tested this
with kms_vrr IGT, do we see the vrr_range properly exposed?
Also please find some comments below
On Sat, Jun 20, 2020 at 02:53:56AM +0530, Bhanuprakash Modem wrote:
> [Why]
> It's useful to know the min and max vrr range for IGT testing.
>
> [How]
> Expose the min and max vfreq for the connector via a debugfs file
> on the connector, "vrr_range".
>
> Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
>
> v2:
> * Fix the typo in max_vfreq (Manasi)
> * Change the name of node to i915_vrr_info so we can add
> other vrr info for more debug info (Manasi)
> * Change the VRR capable to display Yes or No (Manasi)
> * Fix indentation checkpatch errors (Manasi)
> v3:
> * Remove the unnecessary debug print (Manasi)
> v4:
> * Rebase
> v5:
> * Rename to vrr_range to match AMD debugfs
> v6:
> * Rebase (manasi)
> v7:
> * Fix cmpilation due to rebase
> v8:
> * Move debugfs node creation logic to DRM (Emil)
> * Remove AMD specific logic (Emil)
>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@xxxxxxxxx>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Harry Wentland <harry.wentland@xxxxxxx>
> ---
> .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 20 -----------------
> drivers/gpu/drm/drm_debugfs.c | 22 +++++++++++++++++++
> 2 files changed, 22 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> index 076af267b488..71387d2af2ed 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> @@ -820,24 +820,6 @@ static int output_bpc_show(struct seq_file *m, void *data)
> return res;
> }
>
> -/*
> - * Returns the min and max vrr vfreq through the connector's debugfs file.
> - * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
> - */
> -static int vrr_range_show(struct seq_file *m, void *data)
> -{
> - struct drm_connector *connector = m->private;
> - struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
> -
> - if (connector->status != connector_status_connected)
> - return -ENODEV;
> -
> - seq_printf(m, "Min: %u\n", (unsigned int)aconnector->min_vfreq);
> - seq_printf(m, "Max: %u\n", (unsigned int)aconnector->max_vfreq);
> -
> - return 0;
> -}
> -
> #ifdef CONFIG_DRM_AMD_DC_HDCP
> /*
> * Returns the HDCP capability of the Display (1.4 for now).
> @@ -1001,7 +983,6 @@ static ssize_t dp_dpcd_data_read(struct file *f, char __user *buf,
> DEFINE_SHOW_ATTRIBUTE(dmub_fw_state);
> DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer);
> DEFINE_SHOW_ATTRIBUTE(output_bpc);
> -DEFINE_SHOW_ATTRIBUTE(vrr_range);
> #ifdef CONFIG_DRM_AMD_DC_HDCP
> DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);
> #endif
> @@ -1059,7 +1040,6 @@ static const struct {
> {"phy_settings", &dp_phy_settings_debugfs_fop},
> {"test_pattern", &dp_phy_test_pattern_fops},
> {"output_bpc", &output_bpc_fops},
> - {"vrr_range", &vrr_range_fops},
> #ifdef CONFIG_DRM_AMD_DC_HDCP
> {"hdcp_sink_capability", &hdcp_sink_capability_fops},
> #endif
I think the AMD sepecific debugfs removal should be in a separate patch follwing the drm_debugfs addition
patch because from merging pov that patch will get merged through AMD tree
and drm patch will get merged through drm_misc
Also cc the amd dev mailing list for that patch.
@Harry does that sound okay from merging pov?
Manasi
> diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
> index bfe4602f206b..3d7182001004 100644
> --- a/drivers/gpu/drm/drm_debugfs.c
> +++ b/drivers/gpu/drm/drm_debugfs.c
> @@ -376,6 +376,24 @@ static ssize_t edid_write(struct file *file, const char __user *ubuf,
> return (ret) ? ret : len;
> }
>
> +/*
> + * Returns the min and max vrr vfreq through the connector's debugfs file.
> + * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
> + */
> +static int vrr_range_show(struct seq_file *m, void *data)
> +{
> + struct drm_connector *connector = m->private;
> +
> + if (connector->status != connector_status_connected)
> + return -ENODEV;
> +
> + seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
> + seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
> +
> + return 0;
> +}
> +DEFINE_SHOW_ATTRIBUTE(vrr_range);
> +
> static const struct file_operations drm_edid_fops = {
> .owner = THIS_MODULE,
> .open = edid_open,
> @@ -413,6 +431,10 @@ void drm_debugfs_connector_add(struct drm_connector *connector)
> /* edid */
> debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
> &drm_edid_fops);
> +
> + /* vrr range */
> + debugfs_create_file("vrr_range", S_IRUGO, root, connector,
> + &vrr_range_fops);
> }
>
> void drm_debugfs_connector_remove(struct drm_connector *connector)
> --
> 2.20.1
>
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