X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=blobdiff_plain;f=Documentation%2Fdriver-api%2Fmedia%2Fcec-core.rst;h=c6194ee81c41b8b439aca6bdd9372250cdb14fad;hp=56345eae9a262fbab12c06826492e600954ad31d;hb=a2d616b935a0df24bc9375785b19bf30d7fc9c6a;hpb=d098738eb3a14d8a08c6866dd63b5134bcb11782

diff --git a/Documentation/driver-api/media/cec-core.rst b/Documentation/driver-api/media/cec-core.rst
index 56345eae9a26..c6194ee81c41 100644
--- a/Documentation/driver-api/media/cec-core.rst
+++ b/Documentation/driver-api/media/cec-core.rst
@@ -130,9 +130,12 @@ To enable/disable the hardware::
 	int (*adap_enable)(struct cec_adapter *adap, bool enable);
 
 This callback enables or disables the CEC hardware. Enabling the CEC hardware
-means powering it up in a state where no logical addresses are claimed. This
-op assumes that the physical address (adap->phys_addr) is valid when enable is
-true and will not change while the CEC adapter remains enabled. The initial
+means powering it up in a state where no logical addresses are claimed. The
+physical address will always be valid if CEC_CAP_NEEDS_HPD is set. If that
+capability is not set, then the physical address can change while the CEC
+hardware is enabled. CEC drivers should not set CEC_CAP_NEEDS_HPD unless
+the hardware design requires that as this will make it impossible to wake
+up displays that pull the HPD low when in standby mode.  The initial
 state of the CEC adapter after calling cec_allocate_adapter() is disabled.
 
 Note that adap_enable must return 0 if enable is false.