omap4: how to get the HDMI core IRQ?

[Tomi Valkeinen]

On 01/04/16 10:03, Tomi Valkeinen wrote:

> So probably we could just fix hdmi_core_powerdown_disable(), so that it
> sets PD to 1, which is what it was meant to do. This assumes that there
> are no bad side effects having PD 1 even if the HDMI is blanked, which
> is something we need to verify. I can do a few tests with that.

I can't see any bad side effects with fixing the function. So here:

From 5cddaa31e28c059ea99a21ab03c4c1864bf5e610 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen at ti.com>
Date: Fri, 1 Apr 2016 10:29:29 +0300
Subject: [PATCH] drm/omap: fix OMAP4 hdmi_core_powerdown_disable()

hdmi_core_powerdown_disable() is supposed to disable HDMI core's
power-down mode. Howver, the function sets the power-down bit to 0,
which means "enable power-down".

This hasn't caused any issues as the PD seems to affect only interrupts
from HDMI core, and none of those interrupts are used at the moment. CEC
functionality requires core interrupts, and the PD mode needs to be
fixed.

This patch fixes hdmi_core_powerdown_disable() to actually disable the
PD mode.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
Reported-by: Hans Verkuil <hverkuil at xs4all.nl>

diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c b/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
index fa72e735dad2..ef3afe99e487 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
@@ -211,7 +211,7 @@ static void hdmi_core_init(struct hdmi_core_video_config *video_cfg)
 static void hdmi_core_powerdown_disable(struct hdmi_core_data *core)
 {
 	DSSDBG("Enter hdmi_core_powerdown_disable\n");
-	REG_FLD_MOD(core->base, HDMI_CORE_SYS_SYS_CTRL1, 0x0, 0, 0);
+	REG_FLD_MOD(core->base, HDMI_CORE_SYS_SYS_CTRL1, 0x1, 0, 0);
 }
 
 static void hdmi_core_swreset_release(struct hdmi_core_data *core)

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