From: Damien Lespiau Date: Thu, 13 Dec 2012 16:09:02 +0000 (+0000) Subject: drm/i915/dp: Log the DPCD only if we have successfully retrieved one X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=577c7a505b5601a9a441039dd37543775f9af8f5;p=linux-beck.git drm/i915/dp: Log the DPCD only if we have successfully retrieved one Moving the DPCD just after a successful read will allow to: - log all DPCD reads (eDP ones, changes signalled by HPD IRQ) - don't log it if we haven't been able to read it v2: Be sure to log the DPCD when a downstream port does not have HPD support and the branch device asserts HPD (Jani Nikula) Signed-off-by: Damien Lespiau Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 19a0d8984079..5ed8fb3435ee 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2084,10 +2084,16 @@ intel_dp_link_down(struct intel_dp *intel_dp) static bool intel_dp_get_dpcd(struct intel_dp *intel_dp) { + char dpcd_hex_dump[sizeof(intel_dp->dpcd) * 3]; + if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, sizeof(intel_dp->dpcd)) == 0) return false; /* aux transfer failed */ + hex_dump_to_buffer(intel_dp->dpcd, sizeof(intel_dp->dpcd), + 32, 1, dpcd_hex_dump, sizeof(dpcd_hex_dump), false); + DRM_DEBUG_KMS("DPCD: %s\n", dpcd_hex_dump); + if (intel_dp->dpcd[DP_DPCD_REV] == 0) return false; /* DPCD not present */ @@ -2353,7 +2359,6 @@ intel_dp_detect(struct drm_connector *connector, bool force) struct drm_device *dev = connector->dev; enum drm_connector_status status; struct edid *edid = NULL; - char dpcd_hex_dump[sizeof(intel_dp->dpcd) * 3]; intel_dp->has_audio = false; @@ -2362,10 +2367,6 @@ intel_dp_detect(struct drm_connector *connector, bool force) else status = g4x_dp_detect(intel_dp); - hex_dump_to_buffer(intel_dp->dpcd, sizeof(intel_dp->dpcd), - 32, 1, dpcd_hex_dump, sizeof(dpcd_hex_dump), false); - DRM_DEBUG_KMS("DPCD: %s\n", dpcd_hex_dump); - if (status != connector_status_connected) return status;