diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index ce0bdec4b6f9..e2c54912cf11 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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 */ |