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| author | Jerome Glisse <jglisse@redhat.com> | 2012-08-09 11:25:51 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-09-17 11:16:40 +1000 |
| commit | 0b2443ed4e07d7973e4554a2cc166bc35447b59e (patch) | |
| tree | a996dbd03a8480f6473a7ea2fdea3936760de853 /drivers/gpu/drm/drm_edid.c | |
| parent | 09e7dcf081b1100d1cdff57fa9eb25c3a834c9d6 (diff) | |
| download | linux-3.10-0b2443ed4e07d7973e4554a2cc166bc35447b59e.tar.gz linux-3.10-0b2443ed4e07d7973e4554a2cc166bc35447b59e.tar.bz2 linux-3.10-0b2443ed4e07d7973e4554a2cc166bc35447b59e.zip | |
drm/edid: limit printk when facing bad edid
Limit printing bad edid information at one time per connector.
Connector that are connected to a bad monitor/kvm will likely
stay connected to the same bad monitor/kvm and it makes no
sense to keep printing the bad edid message.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index acb489ff363..de2a0ed8e94 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -158,7 +158,7 @@ MODULE_PARM_DESC(edid_fixup, * Sanity check the EDID block (base or extension). Return 0 if the block * doesn't check out, or 1 if it's valid. */ -bool drm_edid_block_valid(u8 *raw_edid, int block) +bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) { int i; u8 csum = 0; @@ -181,7 +181,9 @@ bool drm_edid_block_valid(u8 *raw_edid, int block) for (i = 0; i < EDID_LENGTH; i++) csum += raw_edid[i]; if (csum) { - DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); + if (print_bad_edid) { + DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); + } /* allow CEA to slide through, switches mangle this */ if (raw_edid[0] != 0x02) @@ -207,7 +209,7 @@ bool drm_edid_block_valid(u8 *raw_edid, int block) return 1; bad: - if (raw_edid) { + if (raw_edid && print_bad_edid) { printk(KERN_ERR "Raw EDID:\n"); print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1, raw_edid, EDID_LENGTH, false); @@ -231,7 +233,7 @@ bool drm_edid_is_valid(struct edid *edid) return false; for (i = 0; i <= edid->extensions; i++) - if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i)) + if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true)) return false; return true; @@ -316,6 +318,7 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) { int i, j = 0, valid_extensions = 0; u8 *block, *new; + bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL) return NULL; @@ -324,7 +327,7 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) for (i = 0; i < 4; i++) { if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) goto out; - if (drm_edid_block_valid(block, 0)) + if (drm_edid_block_valid(block, 0, print_bad_edid)) break; if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { connector->null_edid_counter++; @@ -349,7 +352,7 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) block + (valid_extensions + 1) * EDID_LENGTH, j, EDID_LENGTH)) goto out; - if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j)) { + if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) { valid_extensions++; break; } @@ -372,8 +375,11 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) return block; carp: - dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", - drm_get_connector_name(connector), j); + if (print_bad_edid) { + dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", + drm_get_connector_name(connector), j); + } + connector->bad_edid_counter++; out: kfree(block); |