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Unverified Commit 46d1b42b authored by Jernej Skrabec's avatar Jernej Skrabec Committed by Maxime Ripard
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drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a 



Allwinner SoCs have dw hdmi controller v1.32a which exhibits same
magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it.

Tests show that one iteration is enough.

Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214200906.31509-4-jernej.skrabec@siol.net
parent 45640058

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

+5 −3
Original line number Diff line number Diff line
@@ -1634,9 +1634,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) 
	 * then write one of the FC registers several times.

	 *

	 * The number of iterations matters and depends on the HDMI TX revision

	 * (and possibly on the platform). So far only i.MX6Q (v1.30a) and

	 * i.MX6DL (v1.31a) have been identified as needing the workaround, with

	 * 4 and 1 iterations respectively.

	 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL

	 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified

	 * as needing the workaround, with 4 iterations for v1.30a and 1

	 * iteration for others.

	 */



	switch (hdmi->version) {
@@ -1644,6 +1645,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) 
		count = 4;

		break;

	case 0x131a:

	case 0x132a:

		count = 1;

		break;

	default: