diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 32 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 15 |
2 files changed, 35 insertions, 12 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index f4a06b54aa7d..0cccbcb2d03e 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -185,6 +185,20 @@ EXPORT_SYMBOL(drm_dp_bw_code_to_link_rate); #define AUX_RETRY_INTERVAL 500 /* us */ +static inline void +drm_dp_dump_access(const struct drm_dp_aux *aux, + u8 request, uint offset, void *buffer, int ret) +{ + const char *arrow = request == DP_AUX_NATIVE_READ ? "->" : "<-"; + + if (ret > 0) + drm_dbg(DRM_UT_DP, "%s: 0x%05x AUX %s (ret=%3d) %*ph\n", + aux->name, offset, arrow, ret, min(ret, 20), buffer); + else + drm_dbg(DRM_UT_DP, "%s: 0x%05x AUX %s (ret=%3d)\n", + aux->name, offset, arrow, ret); +} + /** * DOC: dp helpers * @@ -288,10 +302,14 @@ ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset, ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, DP_DPCD_REV, buffer, 1); if (ret != 1) - return ret; + goto out; - return drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, buffer, - size); + ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, buffer, + size); + +out: + drm_dp_dump_access(aux, DP_AUX_NATIVE_READ, offset, buffer, ret); + return ret; } EXPORT_SYMBOL(drm_dp_dpcd_read); @@ -312,8 +330,12 @@ EXPORT_SYMBOL(drm_dp_dpcd_read); ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size) { - return drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer, - size); + int ret; + + ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer, + size); + drm_dp_dump_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer, ret); + return ret; } EXPORT_SYMBOL(drm_dp_dpcd_write); diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 6eb935bb2f92..ea4941da9b27 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -54,13 +54,14 @@ MODULE_AUTHOR("Gareth Hughes, Leif Delgass, José Fonseca, Jon Smirl"); MODULE_DESCRIPTION("DRM shared core routines"); MODULE_LICENSE("GPL and additional rights"); MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" -"\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" -"\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" -"\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" -"\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" -"\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" -"\t\tBit 5 (0x20) will enable VBL messages (vblank code)\n" -"\t\tBit 7 (0x80) will enable LEASE messages (leasing code)"); +"\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" +"\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" +"\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" +"\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" +"\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" +"\t\tBit 5 (0x20) will enable VBL messages (vblank code)\n" +"\t\tBit 7 (0x80) will enable LEASE messages (leasing code)\n" +"\t\tBit 8 (0x100) will enable DP messages (displayport code)"); module_param_named(debug, drm_debug, int, 0600); static DEFINE_SPINLOCK(drm_minor_lock); |