[PATCH v4 03/12] drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a
From: Jernej Skrabec <hidden>
Date: 2018-02-07 21:17:37
Also in:
dri-devel, linux-arm-kernel, linux-clk, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for bridge chips, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Andrzej Hajda, Neil Armstrong, Robert Foss, Linus Torvalds
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: Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org> Signed-off-by: Jernej Skrabec <redacted> --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a38db40ce990..7ca14d7325b5 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c@@ -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:
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2.16.1