From 307e754403e5d58a9d3f37cd5be811e047ca6621 Mon Sep 17 00:00:00 2001
From: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Date: Thu, 13 Apr 2023 17:15:02 +0530
Subject: drm/i915/debugfs: New debugfs for display clock frequencies
Git-commit: d7c281eecec0699449ca9ecfff82fe056dddb488
Patch-mainline: v6.5-rc1
References: jsc#PED-3527 jsc#PED-5475 jsc#PED-6068 jsc#PED-6070 jsc#PED-6116 jsc#PED-6120 jsc#PED-5065 jsc#PED-5477 jsc#PED-5511 jsc#PED-6041 jsc#PED-6069 jsc#PED-6071
Instead of mixing display & non-display stuff together, move
display specific clock info to new debugfs. This patch will
create a new debugfs "i915_cdclk_info" to expose Current & Max
cdclk and Max pixel clock frequency info.
Example:
$ cat /sys/kernel/debug/dri/0/i915_cdclk_info
Current CD clock frequency: 163200 kHz
Max CD clock frequency: 652800 kHz
Max pixel clock frequency: 1305600 kHz
V2: - s/i915_display_clock_info/i915_cdclk_info/ (Jani)
- Move the logic to intel_cdclk.c (Jani)
- Don't remove info from i915_frequency_info (Jani)
V3: - Drop locking (Jani)
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230413114502.1105288-1-bhanuprakash.modem@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_cdclk.c | 21 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_cdclk.h | 1 +
.../drm/i915/display/intel_display_debugfs.c | 1 +
3 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 2aaaba090cc0..e0bc45ea63aa 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -3247,6 +3247,27 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv)
return freq;
}
+static int i915_cdclk_info_show(struct seq_file *m, void *unused)
+{
+ struct drm_i915_private *i915 = m->private;
+
+ seq_printf(m, "Current CD clock frequency: %d kHz\n", i915->display.cdclk.hw.cdclk);
+ seq_printf(m, "Max CD clock frequency: %d kHz\n", i915->display.cdclk.max_cdclk_freq);
+ seq_printf(m, "Max pixel clock frequency: %d kHz\n", i915->max_dotclk_freq);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(i915_cdclk_info);
+
+void intel_cdclk_debugfs_register(struct drm_i915_private *i915)
+{
+ struct drm_minor *minor = i915->drm.primary;
+
+ debugfs_create_file("i915_cdclk_info", 0444, minor->debugfs_root,
+ i915, &i915_cdclk_info_fops);
+}
+
static const struct intel_cdclk_funcs mtl_cdclk_funcs = {
.get_cdclk = bxt_get_cdclk,
.set_cdclk = bxt_set_cdclk,
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.h b/drivers/gpu/drm/i915/display/intel_cdclk.h
index 51e2f6a11ce4..48fd7d39e0cd 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.h
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.h
@@ -82,5 +82,6 @@ intel_atomic_get_cdclk_state(struct intel_atomic_state *state);
to_intel_cdclk_state(intel_atomic_get_new_global_obj_state(state, &to_i915(state->base.dev)->display.cdclk.obj))
int intel_cdclk_init(struct drm_i915_private *dev_priv);
+void intel_cdclk_debugfs_register(struct drm_i915_private *i915);
#endif /* __INTEL_CDCLK_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 45113ae107ba..abd16a2b1f7a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1094,6 +1094,7 @@ void intel_display_debugfs_register(struct drm_i915_private *i915)
ARRAY_SIZE(intel_display_debugfs_list),
minor->debugfs_root, minor);
+ intel_cdclk_debugfs_register(i915);
intel_dmc_debugfs_register(i915);
intel_fbc_debugfs_register(i915);
intel_hpd_debugfs_register(i915);
--
2.42.0