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drm/exynos/hdmi: fix pipeline disable order 

Hardware require that MIXER(crtc) should be disabled prior to
HDMI(encoder). It was achieved by disabling crtc from encoder disable
callback, bypassing drm core. As a result drm core tried to call vblank
related routines on disabled crtc. The patch fixes it by simplifying
hdmi_disable routine - now it only cancels hotplug worker. Hardware will
be disabled in proper moment during pipe clock disable.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2017-05-19 17:27:08 +09:00 committed by Inki Dae
parent b2adc53075
commit 625e63e27c
1 changed files with 3 additions and 10 deletions
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13
drivers/gpu/drm/exynos/exynos_hdmi.c
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@ -1486,8 +1486,6 @@ static void hdmi_enable(struct drm_encoder *encoder)
static void hdmi_disable(struct drm_encoder *encoder)
{
struct hdmi_context *hdata = encoder_to_hdmi(encoder);
struct drm_crtc *crtc = encoder->crtc;
const struct drm_crtc_helper_funcs *funcs = NULL;
if (!hdata->powered)
return;
@ -1498,16 +1496,11 @@ static void hdmi_disable(struct drm_encoder *encoder)
* to disable TV Subsystem should be as following,
* VP -> Mixer -> HDMI
*
* Below codes will try to disable Mixer and VP(if used)
* prior to disabling HDMI.
* To achieve such sequence HDMI is disabled together with HDMI PHY, via
* pipe clock callback.
*/
if (crtc)
funcs = crtc->helper_private;
if (funcs && funcs->disable)
(*funcs->disable)(crtc);
cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
cancel_delayed_work(&hdata->hotplug_work);
cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
hdmiphy_disable(hdata);
}