From: "Jernej Škrabec" <jernej.skrabec@gmail.com>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
andrzej.hajda@intel.com, narmstrong@baylibre.com,
robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com,
jonas@kwiboo.se, hverkuil-cisco@xs4all.nl,
Sandor Yu <Sandor.yu@nxp.com>
Cc: Sandor.yu@nxp.com, shengjiu.wang@nxp.com, cai.huoqing@linux.dev,
maxime@cerno.tech, harry.wentland@amd.com
Subject: Re: [PATCH v2 2/5] drm: bridge: dw_hdmi: default enable workaround to clear the overflow
Date: Sun, 10 Apr 2022 12:20:59 +0200 [thread overview]
Message-ID: <8087050.NyiUUSuA9g@jernej-laptop> (raw)
In-Reply-To: <39592fee39610c544058e6b8f9af4b4ea8dc4cdc.1649412256.git.Sandor.yu@nxp.com>
Dne petek, 08. april 2022 ob 12:32:25 CEST je Sandor Yu napisal(a):
> i.MX8MPlus (v2.13a) has verified need the workaround to clear the
> overflow with one iteration.
> Only i.MX6Q(v1.30a) need the workaround with 4 iterations,
> the others versions later than v1.3a have been identified as needing
> the workaround with a single iteration.
>
> Default enable the workaround with one iteration for all versions
> later than v1.30a.
>
> Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 23 +++++++----------------
> 1 file changed, 7 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index
> 4befc104d220..02d8f7e08814 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2086,30 +2086,21 @@ 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 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.
> - * The Amlogic Meson GX SoCs (v2.01a) have been identified as
needing
> - * the workaround with a single iteration.
> - * The Rockchip RK3288 SoC (v2.00a) and RK3328/RK3399 SoCs
(v2.11a) have
> - * been identified as needing the workaround with a single
iteration.
> + * (and possibly on the platform).
> + * 4 iterations for i.MX6Q(v1.30a) and 1 iteration for others.
> + * i.MX6DL (v1.31a), Allwinner SoCs (v1.32a), Rockchip RK3288 SoC
> (v2.00a), + * Amlogic Meson GX SoCs (v2.01a), RK3328/RK3399 SoCs (v2.11a)
> + * and i.MX8MPlus (v2.13a) have been identified as needing the
workaround
> + * with a single iteration.
> */
It would be easier to read and modify later if platforms/controllers/variants
are given as list, one per line, but it could be done later.
Best regards,
Jernej
>
> switch (hdmi->version) {
> case 0x130a:
> count = 4;
> break;
> - case 0x131a:
> - case 0x132a:
> - case 0x200a:
> - case 0x201a:
> - case 0x211a:
> - case 0x212a:
> + default:
> count = 1;
> break;
> - default:
> - return;
> }
>
> /* TMDS software reset */
next prev parent reply other threads:[~2022-04-10 10:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-08 10:32 [PATCH v2 0/5] DRM: Bridge: DW_HDMI: Add new features and bug fix Sandor Yu
2022-04-08 10:32 ` [PATCH v2 1/5] drm: bridge: dw_hdmi: cec: Add cec suspend/resume function Sandor Yu
2022-04-08 13:41 ` Neil Armstrong
2022-04-10 10:13 ` Jernej Škrabec
2022-04-11 7:42 ` Neil Armstrong
2022-04-11 7:47 ` [EXT] " Sandor Yu
2022-04-08 10:32 ` [PATCH v2 2/5] drm: bridge: dw_hdmi: default enable workaround to clear the overflow Sandor Yu
2022-04-08 12:20 ` Neil Armstrong
2022-04-10 10:20 ` Jernej Škrabec [this message]
2022-04-08 10:32 ` [PATCH v2 3/5] drm: bridge: dw_hdmi: Enable GCP only for Deep Color Sandor Yu
2022-04-08 12:40 ` Neil Armstrong
2022-04-11 9:24 ` [EXT] " Sandor Yu
2022-04-08 10:32 ` [PATCH v2 4/5] drm: bridge: dw_hdmi: add reset function for PHY GEN1 Sandor Yu
2022-04-08 12:22 ` Neil Armstrong
2022-04-10 10:14 ` Jernej Škrabec
2022-04-08 10:32 ` [PATCH v2 5/5] drm: bridge: dw_hdmi: Audio: Add General Parallel Audio (GPA) driver Sandor Yu
2022-04-08 12:51 ` Neil Armstrong
2022-04-11 8:52 ` [EXT] " Sandor Yu
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