From: Ville Syrjälä ville.syrjala@linux.intel.com

To make it easier to figure out what caused a particular debug message let's print out aux->name.

v2: Convert drm_dp_send_real_edid_checksum() too

Cc: Sam Ravnborg sam@ravnborg.org Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- IIRC Sam suggested that I switch to per-device logging functions at the same time. Sadly that's going to require some amount of actual work: For i915/amdgpu/nouveau/etc. aux->dev is connector->kdev instead of the pdev->dev we want, which we could handle by walking up the tree several levels. However it looks like some of the armish drivers stick pdev->dev directly into aux->dev so there we don't want to walk up the tree. This means either one set of drivers will need to change their aux->dev assignment approach, or we're going to need another device pointer in there. I didn't even want to look what the bridge drivers put there. In the meantime I refreshed the original patch which at least lets us see aux->name...

drivers/gpu/drm/drm_dp_helper.c | 67 ++++++++++++++++++--------------- 1 file changed, 37 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 43e57632b00a..743ead068a43 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -257,7 +257,8 @@ static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request, err = ret; }

- DRM_DEBUG_KMS("Too many retries, giving up. First error: %d\n", err); + DRM_DEBUG_KMS("%s: Too many retries, giving up. First error: %d\n", + aux->name, err); ret = err;

unlock: @@ -376,43 +377,44 @@ bool drm_dp_send_real_edid_checksum(struct drm_dp_aux *aux,

if (drm_dp_dpcd_read(aux, DP_DEVICE_SERVICE_IRQ_VECTOR, &auto_test_req, 1) < 1) { - DRM_ERROR("DPCD failed read at register 0x%x\n", - DP_DEVICE_SERVICE_IRQ_VECTOR); + DRM_ERROR("%s: DPCD failed read at register 0x%x\n", + aux->name, DP_DEVICE_SERVICE_IRQ_VECTOR); return false; } auto_test_req &= DP_AUTOMATED_TEST_REQUEST;

if (drm_dp_dpcd_read(aux, DP_TEST_REQUEST, &link_edid_read, 1) < 1) { - DRM_ERROR("DPCD failed read at register 0x%x\n", - DP_TEST_REQUEST); + DRM_ERROR("%s: DPCD failed read at register 0x%x\n", + aux->name, DP_TEST_REQUEST); return false; } link_edid_read &= DP_TEST_LINK_EDID_READ;

if (!auto_test_req || !link_edid_read) { - DRM_DEBUG_KMS("Source DUT does not support TEST_EDID_READ\n"); + DRM_DEBUG_KMS("%s: Source DUT does not support TEST_EDID_READ\n", + aux->name); return false; }

if (drm_dp_dpcd_write(aux, DP_DEVICE_SERVICE_IRQ_VECTOR, &auto_test_req, 1) < 1) { - DRM_ERROR("DPCD failed write at register 0x%x\n", - DP_DEVICE_SERVICE_IRQ_VECTOR); + DRM_ERROR("%s: DPCD failed write at register 0x%x\n", + aux->name, DP_DEVICE_SERVICE_IRQ_VECTOR); return false; }

/* send back checksum for the last edid extension block data */ if (drm_dp_dpcd_write(aux, DP_TEST_EDID_CHECKSUM, &real_edid_checksum, 1) < 1) { - DRM_ERROR("DPCD failed write at register 0x%x\n", - DP_TEST_EDID_CHECKSUM); + DRM_ERROR("%s: DPCD failed write at register 0x%x\n", + aux->name, DP_TEST_EDID_CHECKSUM); return false; }

test_resp |= DP_TEST_EDID_CHECKSUM_WRITE; if (drm_dp_dpcd_write(aux, DP_TEST_RESPONSE, &test_resp, 1) < 1) { - DRM_ERROR("DPCD failed write at register 0x%x\n", - DP_TEST_RESPONSE); + DRM_ERROR("%s: DPCD failed write at register 0x%x\n", + aux->name, DP_TEST_RESPONSE); return false; }

@@ -737,10 +739,11 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) * Avoid spamming the kernel log with timeout errors. */ if (ret == -ETIMEDOUT) - DRM_DEBUG_KMS_RATELIMITED("transaction timed out\n"); + DRM_DEBUG_KMS_RATELIMITED("%s: transaction timed out\n", + aux->name); else - DRM_DEBUG_KMS("transaction failed: %d\n", ret); - + DRM_DEBUG_KMS("%s: transaction failed: %d\n", + aux->name, ret); return ret; }

@@ -754,11 +757,12 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) break;

case DP_AUX_NATIVE_REPLY_NACK: - DRM_DEBUG_KMS("native nack (result=%d, size=%zu)\n", ret, msg->size); + DRM_DEBUG_KMS("%s: native nack (result=%d, size=%zu)\n", + aux->name, ret, msg->size); return -EREMOTEIO;

case DP_AUX_NATIVE_REPLY_DEFER: - DRM_DEBUG_KMS("native defer\n"); + DRM_DEBUG_KMS("%s: native defer\n", aux->name); /* * We could check for I2C bit rate capabilities and if * available adjust this interval. We could also be @@ -772,7 +776,8 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) continue;

default: - DRM_ERROR("invalid native reply %#04x\n", msg->reply); + DRM_ERROR("%s: invalid native reply %#04x\n", + aux->name, msg->reply); return -EREMOTEIO; }

@@ -787,13 +792,13 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) return ret;

case DP_AUX_I2C_REPLY_NACK: - DRM_DEBUG_KMS("I2C nack (result=%d, size=%zu)\n", - ret, msg->size); + DRM_DEBUG_KMS("%s: I2C nack (result=%d, size=%zu)\n", + aux->name, ret, msg->size); aux->i2c_nack_count++; return -EREMOTEIO;

case DP_AUX_I2C_REPLY_DEFER: - DRM_DEBUG_KMS("I2C defer\n"); + DRM_DEBUG_KMS("%s: I2C defer\n", aux->name); /* DP Compliance Test 4.2.2.5 Requirement: * Must have at least 7 retries for I2C defers on the * transaction to pass this test @@ -807,12 +812,13 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) continue;

default: - DRM_ERROR("invalid I2C reply %#04x\n", msg->reply); + DRM_ERROR("%s: invalid I2C reply %#04x\n", + aux->name, msg->reply); return -EREMOTEIO; } }

- DRM_DEBUG_KMS("too many retries, giving up\n"); + DRM_DEBUG_KMS("%s: Too many retries, giving up\n", aux->name); return -EREMOTEIO; }

@@ -841,8 +847,8 @@ static int drm_dp_i2c_drain_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *o return err == 0 ? -EPROTO : err;

if (err < msg.size && err < ret) { - DRM_DEBUG_KMS("Partial I2C reply: requested %zu bytes got %d bytes\n", - msg.size, err); + DRM_DEBUG_KMS("%s: Partial I2C reply: requested %zu bytes got %d bytes\n", + aux->name, msg.size, err); ret = err; }

@@ -1021,11 +1027,12 @@ static void drm_dp_aux_crc_work(struct work_struct *work) }

if (ret == -EAGAIN) { - DRM_DEBUG_KMS("Get CRC failed after retrying: %d\n", - ret); + DRM_DEBUG_KMS("%s: Get CRC failed after retrying: %d\n", + aux->name, ret); continue; } else if (ret) { - DRM_DEBUG_KMS("Failed to get a CRC: %d\n", ret); + DRM_DEBUG_KMS("%s: Failed to get a CRC: %d\n", + aux->name, ret); continue; }

@@ -1387,8 +1394,8 @@ int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,

dev_id_len = strnlen(ident->device_id, sizeof(ident->device_id));

- DRM_DEBUG_KMS("DP %s: OUI %*phD dev-ID %*pE HW-rev %d.%d SW-rev %d.%d quirks 0x%04x\n", - is_branch ? "branch" : "sink", + DRM_DEBUG_KMS("%s: DP %s: OUI %*phD dev-ID %*pE HW-rev %d.%d SW-rev %d.%d quirks 0x%04x\n", + aux->name, is_branch ? "branch" : "sink", (int)sizeof(ident->oui), ident->oui, dev_id_len, ident->device_id, ident->hw_rev >> 4, ident->hw_rev & 0xf,