On 04/01/2016 09:35 AM, Tomi Valkeinen wrote:
>
> 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@xxxxxx>
> 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@xxxxxx>
> Reported-by: Hans Verkuil <hverkuil@xxxxxxxxx>
Tested-by: Hans Verkuil <hverkuil@xxxxxxxxx>
Works like a charm!
Thanks!
Regards,
Hans
>
> 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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