lkml.org 
[lkml]   [2017]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] drm/vc4: Update kerneldoc about CEC and power management
Date
Boris had added full power management, and then Hans partially removed
it to enable CEC, so update the docs about both.

Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 65826a4f208e..ce18384c6be3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -33,13 +33,9 @@
* interconnect) bus to the encoder side for insertion into the video
* blank regions.
*
- * The driver's HDMI encoder does not yet support power management.
- * The HDMI encoder's power domain and the HSM/pixel clocks are kept
- * continuously running, and only the HDMI logic and packet ram are
- * powered off/on at disable/enable time.
- *
- * The driver does not yet support CEC control, though the HDMI
- * encoder block has CEC support.
+ * Note that HDMI CEC requires that the HSM clock be running even when
+ * not scanning out, so that input can be processed. The PHY is still
+ * powered down when not scanning out, though.
*/

#include <drm/drm_atomic_helper.h>
--
2.14.1
\
 
 \ /
  Last update: 2017-09-21 19:24    [W:0.054 / U:0.172 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site