41 lines
1.6 KiB
Diff
41 lines
1.6 KiB
Diff
From 6e06b05d4d0128f3fcc32085f31c2b4add4c0ac7 Mon Sep 17 00:00:00 2001
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From: Jernej Skrabec <jernej.skrabec@siol.net>
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Date: Sat, 2 Sep 2017 19:41:54 +0200
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Subject: [PATCH] drm: bridge: Enable workaround in dw_hdmi for v1.32a
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Allwinner SoCs have dw hdmi controller v1.32a which exhibits same
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magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it.
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Allwinner never released any kind of dw hdmi or errata documentation,
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so it is not clear how many iterations need to be executed. One
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iteration seems to be enough.
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Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
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---
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drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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index 09cb5a3e4c718..72969240a9d42 100644
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--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -1645,7 +1645,9 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
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* i.MX6DL (v1.31a) have been identified as needing the workaround, with
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* 4 and 1 iterations respectively.
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* The Amlogic Meson GX SoCs (v2.01a) have been identified as needing
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- * the workaround with a single iteration.
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+ * the workaround with a single iteration. and multiple Allwinner SoCs
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+ * (v1.32a) have been identified as needing the workaround, with 4 iterations
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+ * for v1.30a and 1 iteration for others.
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*/
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switch (hdmi->version) {
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@@ -1653,6 +1655,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
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count = 4;
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break;
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case 0x131a:
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+ case 0x132a:
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case 0x201a:
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count = 1;
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break;
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