linux-kernel - [PATCH] drm: bridge: dw-hdmi: Fix overflow workaround for Amlogic Meson GX SoCs

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Date:   Fri, 23 Feb 2018 12:44:37 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     airlied@...ux.ie, architt@...eaurora.org, a.hajda@...sung.com
Cc:     Neil Armstrong <narmstrong@...libre.com>, Jose.Abreu@...opsys.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm: bridge: dw-hdmi: Fix overflow workaround for Amlogic Meson GX SoCs

The Amlogic Meson GX SoCs, embedded the v2.01a controller, has been also
identified needing this workaround.
This patch adds the corresponding version to enable a single iteration for
this specific version.

Fixes: be41fc55f1aa ("drm: bridge: dw-hdmi: Handle overflow workaround based on device version")
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a38db40..f5018f9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1637,6 +1637,8 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	 * (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.
+	 * The Amlogic Meson GX SoCs (v2.01a) have been identifies as needing
+	 * the workaround with a single iteration.
 	 */
 
 	switch (hdmi->version) {
@@ -1644,6 +1646,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 		count = 4;
 		break;
 	case 0x131a:
+	case 0x201a:
 		count = 1;
 		break;
 	default:
-- 
2.7.4