From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: maxime.ripard@bootlin.com, wens@csie.org, robh+dt@kernel.org,
sboyd@kernel.org, airlied@linux.ie, architt@codeaurora.org,
a.hajda@samsung.com, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH v2 15/29] drm/bridge/synopsys: dw-hdmi: Enable workaround for v2.12a
Date: Tue, 09 Oct 2018 20:40:44 +0300 [thread overview]
Message-ID: <3616158.EzHeIcd69b@avalon> (raw)
In-Reply-To: <20181007093905.11253-16-jernej.skrabec@siol.net>
Hi Jernej,
Thank you for the patch.
On Sunday, 7 October 2018 12:38:51 EEST Jernej Skrabec wrote:
> It turns out that even new DW HDMI controllers exhibits same magenta
> line issues as older versions.
>
> Enable workaround for v2.12a.
This doesn't affect the platforms I maintain, so I can't really test this, but
I'm wondering whether there could be other platforms using a v2.12a DW HDMI
that wouldn't need the workaround.
My platforms use a previous version, namely v2.01a. The workaround for that
version has been enabled by
commit 9c305eb442f3b371fc722ade827bbf673514123e
Author: Neil Armstrong <narmstrong@baylibre.com>
Date: Fri Feb 23 12:44:37 2018 +0100
drm: bridge: dw-hdmi: Fix overflow workaround for Amlogic Meson GX SoCs
I haven't paid too much attention to the patch back then, and have now double-
checked the HDMI output on R-Car Gen3. Enabling the workaround doesn't cause
any regression, and reverting the commit doesn't cause any issue either. I
thus wonder whether we shouldn't enable the workaround with count = 1 in the
default case instead of adding new IP core versions to the list. It would be
nice if someone from Synopsys could comment on this.
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index
> 5971976284bf..df1c7a2d6961 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1664,6 +1664,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi
> *hdmi) case 0x131a:
> case 0x132a:
> case 0x201a:
> + case 0x212a:
> count = 1;
> break;
> default:
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2018-10-09 17:40 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-07 9:38 [PATCH v2 00/29] Allwinner H6 DE3 and HDMI support Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 01/29] dt-bindings: bus: add H6 DE3 bus binding Jernej Skrabec
2018-10-08 8:31 ` Maxime Ripard
2018-10-08 14:25 ` Jernej Škrabec
2018-10-07 9:38 ` [PATCH v2 02/29] clk: sunxi-ng: Adjust MP clock parent rate when allowed Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 03/29] clk: sunxi-ng: Use u64 for calculation of NM rate Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 04/29] clk: sunxi-ng: h6: Set video PLLs limits Jernej Skrabec
2018-10-12 8:13 ` [linux-sunxi] " Jagan Teki
2018-10-12 9:03 ` Chen-Yu Tsai
2018-10-07 9:38 ` [PATCH v2 05/29] dt-bindings: clock: sun8i-de2: Add H6 DE3 clock description Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 06/29] clk: sunxi-ng: Add support for H6 DE3 clocks Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 07/29] dt-bindings: display: sun4i-drm: Add H6 display engine compatibles Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 08/29] drm/sun4i: Add compatible for H6 display engine Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 09/29] drm/sun4i: Rework DE2 register defines Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 10/29] drm/sun4i: Rename DE2 registers related macros Jernej Skrabec
2018-10-08 10:18 ` Maxime Ripard
2018-10-08 14:28 ` Jernej Škrabec
2018-10-09 15:53 ` Maxime Ripard
2018-10-07 9:38 ` [PATCH v2 11/29] drm/sun4i: Fix DE2 mixer size Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 12/29] drm/sun4i: Disable unused DE2 sub-engines Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 13/29] drm/sun4i: Add basic support for DE3 Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 14/29] drm/sun4i: Add support for H6 DE3 mixer 0 Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 15/29] drm/bridge/synopsys: dw-hdmi: Enable workaround for v2.12a Jernej Skrabec
2018-10-09 17:40 ` Laurent Pinchart [this message]
2018-10-09 17:56 ` Ilia Mirkin
2018-10-09 21:23 ` Russell King - ARM Linux
2018-10-15 17:43 ` [linux-sunxi] " Jernej Škrabec
2018-10-07 9:38 ` [PATCH v2 16/29] drm/sun4i: Not all DW HDMI controllers has scrambled addresses Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 17/29] drm/sun4i: dw-hdmi: Make mode_valid function configurable Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 18/29] drm/sun4i: dw-hdmi: Add quirk for setting TMDS clock Jernej Skrabec
2018-10-08 9:14 ` Maxime Ripard
2018-10-08 15:09 ` Jernej Škrabec
2018-10-09 9:14 ` Maxime Ripard
2018-10-07 9:38 ` [PATCH v2 19/29] dt-bindings: display: sunxi: add DT binding for Allwinner H6 DW HDMI Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 20/29] drm/sun4i: Add support for H6 DW HDMI controller Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 21/29] drm/sun4i: dw-hdmi-phy: Reorder quirks by family Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 22/29] drm/sun4i: Add support for Synopsys HDMI PHY Jernej Skrabec
2018-10-07 9:38 ` [PATCH v2 23/29] drm/sun4i: Add support for H6 " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 24/29] drm/sun4i: Initialize registers in tcon-top driver Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 25/29] drm: sun4i: add quirks for TCON TOP Jernej Skrabec
2018-10-08 8:51 ` Maxime Ripard
2018-10-08 9:06 ` Chen-Yu Tsai
2018-10-08 10:20 ` Maxime Ripard
2018-10-08 10:50 ` Chen-Yu Tsai
2018-10-08 12:33 ` Maxime Ripard
2018-10-08 13:10 ` Chen-Yu Tsai
2018-10-08 14:30 ` Jernej Škrabec
2018-10-07 9:39 ` [PATCH v2 26/29] dt-bindings: display: sun4i-drm: document H6 " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 27/29] drm: sun4i: add support for " Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 28/29] arm64: dts: allwinner: h6: Add HDMI pipeline Jernej Skrabec
2018-10-07 9:39 ` [PATCH v2 29/29] arm64: dts: allwinner: h6: Enable HDMI output on Pine H64 board Jernej Skrabec
2018-10-07 9:50 ` [linux-sunxi] [PATCH v2 00/29] Allwinner H6 DE3 and HDMI support Jernej Škrabec
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