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Commit 344498e0 authored by Tatenda Chipeperekwa's avatar Tatenda Chipeperekwa
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drm/msm/dp: fix AUX initialization sequence 



Fix the AUX initialization sequence by resetting the AUX
hardware on every HPD-high, and powering down it down during
HPD-low. This ensures that the AUX hardware is ready to process
new requests triggered via both the USBPD callback and HPD
paths.

CRs-Fixed: 2105346
Change-Id: I394bedc5d39a78b8dbf59abf11789eaf6d823368
Signed-off-by: default avatarTatenda Chipeperekwa <tatendac@codeaurora.org>
parent 35eafc16

drivers/gpu/drm/msm/dp/dp_display.c

+4 −2
Original line number Diff line number Diff line
@@ -472,6 +472,8 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) 
	u32 max_pclk_from_edid = 0;

	struct edid *edid;



	dp->aux->init(dp->aux, dp->parser->aux_cfg);



	rc = dp->panel->read_sink_caps(dp->panel, dp->dp_display.connector);

	if (rc)

		return rc;
@@ -515,7 +517,6 @@ static void dp_display_host_init(struct dp_display_private *dp) 


	dp->power->init(dp->power, flip);

	dp->ctrl->init(dp->ctrl, flip);

	dp->aux->init(dp->aux, dp->parser->aux_cfg);

	enable_irq(dp->irq);

	dp->core_initialized = true;

}
@@ -527,7 +528,6 @@ static void dp_display_host_deinit(struct dp_display_private *dp) 
		return;

	}



	dp->aux->deinit(dp->aux);

	dp->ctrl->deinit(dp->ctrl);

	dp->power->deinit(dp->power);

	disable_irq(dp->irq);
@@ -548,6 +548,8 @@ static void dp_display_process_hpd_low(struct dp_display_private *dp) 
		dp->audio->off(dp->audio);



	dp_display_send_hpd_notification(dp, false);



	dp->aux->deinit(dp->aux);

}



static int dp_display_usbpd_configure_cb(struct device *dev)