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Date: Sat, 08 Aug 2015 17:04:00 +0100
From: Russell King <rmk+kernel@....linux.org.uk>
To: linux-rockchip@...ts.infradead.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Cc: Philipp Zabel <p.zabel@...gutronix.de>,
Andy Yan <andy.yan@...k-chips.com>,
Yakir Yang <ykk@...k-chips.com>,
Fabio Estevam <fabio.estevam@...escale.com>,
Sascha Hauer <s.hauer@...gutronix.de>,
Jon Nettleton <jon.nettleton@...il.com>,
David Airlie <airlied@...ux.ie>
Subject: [PATCH 08/12] drm: bridge/dw_hdmi: avoid enabling interface in
mode_set
On a mode set, DRM makes the following sequence of calls:
* for_each_encoder
* bridge mode_fixup
* encoder mode_fixup
* crtc mode_fixup
* for_each_encoder
* bridge disable
* encoder prepare
* bridge post_disable
* disable unused encoders
* crtc prepare
* crtc mode_set
* for_each_encoder
* encoder mode_set
* bridge mode_set
* crtc commit
* for_each_encoder
* bridge pre_enable
* encoder commit
* bridge enable
dw_hdmi enables the HDMI output in both the bridge mode_set() and also
the bridge enable() step. This is duplicated work - we can avoid the
setup in mode_set() and just do it in the enable() stage. This
simplifies the code a little.
Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
drivers/gpu/drm/bridge/dw_hdmi.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 578d7362cd65..fbac8386552b 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1389,8 +1389,6 @@ static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
{
struct dw_hdmi *hdmi = bridge->driver_private;
- dw_hdmi_setup(hdmi, mode);
-
/* Store the display mode for plugin/DKMS poweron events */
memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
}
--
2.1.0
--
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