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drm/i915: Show the current i915_params in debugfs/i915_capabilites 

Alongside the hw capabilities, it is useful to know which of those have
been overridden by the user setting module parameters.

v2: Use __always_inline and BUILD_BUG magic

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170206213608.31328-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-06 21:36:08 +00:00
parent 642c8a7253
commit 418e3cd800
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -61,6 +61,21 @@ drm_add_fake_info_node(struct drm_minor *minor,
return 0;
}
static __always_inline void seq_print_param(struct seq_file *m,
const char *name,
const char *type,
const void *x)
{
if (!__builtin_strcmp(type, "bool"))
seq_printf(m, "i915.%s=%s\n", name, yesno(*(const bool *)x));
else if (!__builtin_strcmp(type, "int"))
seq_printf(m, "i915.%s=%d\n", name, *(const int *)x);
else if (!__builtin_strcmp(type, "unsigned int"))
seq_printf(m, "i915.%s=%u\n", name, *(const unsigned int *)x);
else
BUILD_BUG();
}
static int i915_capabilities(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
@ -69,10 +84,17 @@ static int i915_capabilities(struct seq_file *m, void *data)
seq_printf(m, "gen: %d\n", INTEL_GEN(dev_priv));
seq_printf(m, "platform: %s\n", intel_platform_name(info->platform));
seq_printf(m, "pch: %d\n", INTEL_PCH_TYPE(dev_priv));
#define PRINT_FLAG(x) seq_printf(m, #x ": %s\n", yesno(info->x))
DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG);
#undef PRINT_FLAG
kernel_param_lock(THIS_MODULE);
#define PRINT_PARAM(T, x) seq_print_param(m, #x, #T, &i915.x);
I915_PARAMS_FOR_EACH(PRINT_PARAM);
#undef PRINT_PARAM
kernel_param_unlock(THIS_MODULE);
return 0;
}