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drm/i915: Include the sink/source/supported rates in debug output

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TODO: Is there an actually nice way to print an array of ints?

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-03-12 17:10:39 +02:00 committed by Daniel Vetter
parent fe51bfb95c
commit 0336400ebe
1 changed files with 43 additions and 0 deletions
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43
drivers/gpu/drm/i915/intel_dp.c
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@ -1239,6 +1239,46 @@ static int intel_supported_rates(struct intel_dp *intel_dp,
supported_rates);
}
static void snprintf_int_array(char *str, size_t len,
const int *array, int nelem)
{
int i;
str[0] = '\0';
for (i = 0; i < nelem; i++) {
int r = snprintf(str, len, "%d,", array[i]);
if (r >= len)
return;
str += r;
len -= r;
}
}
static void intel_dp_print_rates(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp_to_dev(intel_dp);
const int *source_rates, *sink_rates;
int source_len, sink_len, supported_len;
int supported_rates[DP_MAX_SUPPORTED_RATES];
char str[128]; /* FIXME: too big for stack? */
if ((drm_debug & DRM_UT_KMS) == 0)
return;
source_len = intel_dp_source_rates(dev, &source_rates);
snprintf_int_array(str, sizeof(str), source_rates, source_len);
DRM_DEBUG_KMS("source rates: %s\n", str);
sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
snprintf_int_array(str, sizeof(str), sink_rates, sink_len);
DRM_DEBUG_KMS("sink rates: %s\n", str);
supported_len = intel_supported_rates(intel_dp, supported_rates);
snprintf_int_array(str, sizeof(str), supported_rates, supported_len);
DRM_DEBUG_KMS("supported rates: %s\n", str);
}
static int rate_to_index(int find, const int *rates)
{
int i = 0;
@ -3775,6 +3815,9 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
}
intel_dp->num_supported_rates = i;
}
intel_dp_print_rates(intel_dp);
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
return true; /* native DP sink */