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Commit 0336400e authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Daniel Vetter
Browse files

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



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

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarSonika Jindal <sonika.jindal@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent fe51bfb9

drivers/gpu/drm/i915/intel_dp.c

+43 −0
Original line number Diff line number Diff line
@@ -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 */