leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915: add a debugfs entry for power domain info

Browse Source 
Add a debugfs entry showing the use-count for all power domains of each
power well.

v3: address comments from Paulo:
- simplify power_domain_str() by using a switch table
- move power_well::domain_count to power_domains
- WARN_ON decrementing a 0 refcount

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Paulo Zanoni <paulo.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2013-11-25 17:15:35 +02:00 committed by Daniel Vetter
parent 1c2256df26
commit 1da51581b0
3 changed files with 86 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1844,6 +1844,76 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
return 0;
}
static const char *power_domain_str(enum intel_display_power_domain domain)
{
switch (domain) {
case POWER_DOMAIN_PIPE_A:
return "PIPE_A";
case POWER_DOMAIN_PIPE_B:
return "PIPE_B";
case POWER_DOMAIN_PIPE_C:
return "PIPE_C";
case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
return "PIPE_A_PANEL_FITTER";
case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
return "PIPE_B_PANEL_FITTER";
case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
return "PIPE_C_PANEL_FITTER";
case POWER_DOMAIN_TRANSCODER_A:
return "TRANSCODER_A";
case POWER_DOMAIN_TRANSCODER_B:
return "TRANSCODER_B";
case POWER_DOMAIN_TRANSCODER_C:
return "TRANSCODER_C";
case POWER_DOMAIN_TRANSCODER_EDP:
return "TRANSCODER_EDP";
case POWER_DOMAIN_VGA:
return "VGA";
case POWER_DOMAIN_AUDIO:
return "AUDIO";
case POWER_DOMAIN_INIT:
return "INIT";
default:
WARN_ON(1);
return "?";
}
}
static int i915_power_domain_info(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_power_domains *power_domains = &dev_priv->power_domains;
int i;
mutex_lock(&power_domains->lock);
seq_printf(m, "%-25s %s\n", "Power well/domain", "Use count");
for (i = 0; i < power_domains->power_well_count; i++) {
struct i915_power_well *power_well;
enum intel_display_power_domain power_domain;
power_well = &power_domains->power_wells[i];
seq_printf(m, "%-25s %d\n", power_well->name,
power_well->count);
for (power_domain = 0; power_domain < POWER_DOMAIN_NUM;
power_domain++) {
if (!(BIT(power_domain) & power_well->domains))
continue;
seq_printf(m, " %-23s %d\n",
power_domain_str(power_domain),
power_domains->domain_use_count[power_domain]);
}
}
mutex_unlock(&power_domains->lock);
return 0;
}
struct pipe_crc_info {
const char *name;
struct drm_device *dev;
@ -3079,6 +3149,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
{"i915_edp_psr_status", i915_edp_psr_status, 0},
{"i915_energy_uJ", i915_energy_uJ, 0},
{"i915_pc8_status", i915_pc8_status, 0},
{"i915_power_domain_info", i915_power_domain_info, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)

3
drivers/gpu/drm/i915/i915_drv.h
View File

@ -971,6 +971,9 @@ struct i915_power_domains {
int power_well_count;
struct mutex lock;
#if IS_ENABLED(CONFIG_DEBUG_FS)
int domain_use_count[POWER_DOMAIN_NUM];
#endif
struct i915_power_well *power_wells;
};

12
drivers/gpu/drm/i915/intel_pm.c
View File

@ -5754,8 +5754,13 @@ void intel_display_power_get(struct drm_device *dev,
power_domains = &dev_priv->power_domains;
mutex_lock(&power_domains->lock);
#if IS_ENABLED(CONFIG_DEBUG_FS)
power_domains->domain_use_count[domain]++;
#endif
for_each_power_well(i, power_well, BIT(domain), power_domains)
__intel_power_well_get(dev, power_well);
mutex_unlock(&power_domains->lock);
}
@ -5770,8 +5775,15 @@ void intel_display_power_put(struct drm_device *dev,
power_domains = &dev_priv->power_domains;
mutex_lock(&power_domains->lock);
for_each_power_well_rev(i, power_well, BIT(domain), power_domains)
__intel_power_well_put(dev, power_well);
#if IS_ENABLED(CONFIG_DEBUG_FS)
WARN_ON(!power_domains->domain_use_count[domain]);
power_domains->domain_use_count[domain]--;
#endif
mutex_unlock(&power_domains->lock);
}