From: Marek Vasut <marex@denx.de>
To: Jagan Teki <jagan@amarulasolutions.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
Inki Dae <inki.dae@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Joonyoung Shim <jy0922.shim@samsung.com>,
Seung-Woo Kim <sw0312.kim@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
Fancy Fang <chen.fang@nxp.com>,
Tim Harvey <tharvey@gateworks.com>,
Michael Nazzareno Trimarchi <michael@amarulasolutions.com>,
Adam Ford <aford173@gmail.com>,
Neil Armstrong <narmstrong@linaro.org>,
Robert Foss <robert.foss@linaro.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
Cc: Matteo Lisi <matteo.lisi@engicam.com>,
dri-devel@lists.freedesktop.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
NXP Linux Team <linux-imx@nxp.com>,
linux-amarula <linux-amarula@amarulasolutions.com>
Subject: Re: [PATCH v7 08/10] drm: bridge: samsung-dsim: Add input_bus_flags
Date: Sat, 15 Oct 2022 23:37:10 +0200 [thread overview]
Message-ID: <90ab7268-ca93-0598-e09b-258030654545@denx.de> (raw)
In-Reply-To: <20221005151309.7278-9-jagan@amarulasolutions.com>
On 10/5/22 17:13, Jagan Teki wrote:
[...]
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index f714e49c1eab..f5cd80641cea 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -1601,6 +1601,10 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = {
> .unregister_host = samsung_dsim_unregister_host,
> };
>
> +static const struct drm_bridge_timings samsung_dsim_bridge_timings = {
> + .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
> +};
> +
> int samsung_dsim_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -1681,6 +1685,7 @@ int samsung_dsim_probe(struct platform_device *pdev)
>
> dsi->bridge.funcs = &samsung_dsim_bridge_funcs;
> dsi->bridge.of_node = dev->of_node;
> + dsi->bridge.timings = &samsung_dsim_bridge_timings;
Is this really valid on Exynos too ?
My impression is that the DE_LOW requirement is only needed for MX8MM/MN
where the LCDIF-DSIM glue logic inverts the HS/VS/DE signals, while on
all other platforms (at least MX8MP) the inversion does not take place,
so DE is really active HIGH there.
WARNING: multiple messages have this Message-ID (diff)
From: Marek Vasut <marex@denx.de>
To: Jagan Teki <jagan@amarulasolutions.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
Inki Dae <inki.dae@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Joonyoung Shim <jy0922.shim@samsung.com>,
Seung-Woo Kim <sw0312.kim@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
Fancy Fang <chen.fang@nxp.com>,
Tim Harvey <tharvey@gateworks.com>,
Michael Nazzareno Trimarchi <michael@amarulasolutions.com>,
Adam Ford <aford173@gmail.com>,
Neil Armstrong <narmstrong@linaro.org>,
Robert Foss <robert.foss@linaro.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
Cc: linux-samsung-soc@vger.kernel.org,
Matteo Lisi <matteo.lisi@engicam.com>,
dri-devel@lists.freedesktop.org,
NXP Linux Team <linux-imx@nxp.com>,
linux-amarula <linux-amarula@amarulasolutions.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 08/10] drm: bridge: samsung-dsim: Add input_bus_flags
Date: Sat, 15 Oct 2022 23:37:10 +0200 [thread overview]
Message-ID: <90ab7268-ca93-0598-e09b-258030654545@denx.de> (raw)
In-Reply-To: <20221005151309.7278-9-jagan@amarulasolutions.com>
On 10/5/22 17:13, Jagan Teki wrote:
[...]
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index f714e49c1eab..f5cd80641cea 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -1601,6 +1601,10 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = {
> .unregister_host = samsung_dsim_unregister_host,
> };
>
> +static const struct drm_bridge_timings samsung_dsim_bridge_timings = {
> + .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
> +};
> +
> int samsung_dsim_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -1681,6 +1685,7 @@ int samsung_dsim_probe(struct platform_device *pdev)
>
> dsi->bridge.funcs = &samsung_dsim_bridge_funcs;
> dsi->bridge.of_node = dev->of_node;
> + dsi->bridge.timings = &samsung_dsim_bridge_timings;
Is this really valid on Exynos too ?
My impression is that the DE_LOW requirement is only needed for MX8MM/MN
where the LCDIF-DSIM glue logic inverts the HS/VS/DE signals, while on
all other platforms (at least MX8MP) the inversion does not take place,
so DE is really active HIGH there.
WARNING: multiple messages have this Message-ID (diff)
From: Marek Vasut <marex@denx.de>
To: Jagan Teki <jagan@amarulasolutions.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
Inki Dae <inki.dae@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Joonyoung Shim <jy0922.shim@samsung.com>,
Seung-Woo Kim <sw0312.kim@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
Fancy Fang <chen.fang@nxp.com>,
Tim Harvey <tharvey@gateworks.com>,
Michael Nazzareno Trimarchi <michael@amarulasolutions.com>,
Adam Ford <aford173@gmail.com>,
Neil Armstrong <narmstrong@linaro.org>,
Robert Foss <robert.foss@linaro.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
Cc: Matteo Lisi <matteo.lisi@engicam.com>,
dri-devel@lists.freedesktop.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
NXP Linux Team <linux-imx@nxp.com>,
linux-amarula <linux-amarula@amarulasolutions.com>
Subject: Re: [PATCH v7 08/10] drm: bridge: samsung-dsim: Add input_bus_flags
Date: Sat, 15 Oct 2022 23:37:10 +0200 [thread overview]
Message-ID: <90ab7268-ca93-0598-e09b-258030654545@denx.de> (raw)
In-Reply-To: <20221005151309.7278-9-jagan@amarulasolutions.com>
On 10/5/22 17:13, Jagan Teki wrote:
[...]
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index f714e49c1eab..f5cd80641cea 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -1601,6 +1601,10 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = {
> .unregister_host = samsung_dsim_unregister_host,
> };
>
> +static const struct drm_bridge_timings samsung_dsim_bridge_timings = {
> + .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
> +};
> +
> int samsung_dsim_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -1681,6 +1685,7 @@ int samsung_dsim_probe(struct platform_device *pdev)
>
> dsi->bridge.funcs = &samsung_dsim_bridge_funcs;
> dsi->bridge.of_node = dev->of_node;
> + dsi->bridge.timings = &samsung_dsim_bridge_timings;
Is this really valid on Exynos too ?
My impression is that the DE_LOW requirement is only needed for MX8MM/MN
where the LCDIF-DSIM glue logic inverts the HS/VS/DE signals, while on
all other platforms (at least MX8MP) the inversion does not take place,
so DE is really active HIGH there.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-10-15 21:37 UTC|newest]
Thread overview: 157+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20221005151323eucas1p2c69fc9989b84a9d74d568469ccd81f35@eucas1p2.samsung.com>
2022-10-05 15:12 ` [PATCH v7 00/10] drm: bridge: Add Samsung MIPI DSIM bridge Jagan Teki
2022-10-05 15:12 ` Jagan Teki
2022-10-05 15:12 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 01/10] drm: bridge: Add Samsung DSIM bridge driver Jagan Teki
2022-10-15 21:46 ` Marek Vasut
2022-10-15 21:46 ` Marek Vasut
2022-10-15 21:46 ` Marek Vasut
2022-10-17 2:49 ` Jagan Teki
2022-10-17 2:49 ` Jagan Teki
2022-10-17 2:49 ` Jagan Teki
2022-10-17 7:19 ` Marek Vasut
2022-10-17 7:19 ` Marek Vasut
2022-10-17 7:19 ` Marek Vasut
2022-10-17 7:43 ` Jagan Teki
2022-10-17 7:43 ` Jagan Teki
2022-10-17 7:43 ` Jagan Teki
2022-10-17 8:48 ` Marek Vasut
2022-10-17 8:48 ` Marek Vasut
2022-10-17 8:48 ` Marek Vasut
2022-10-17 9:01 ` Marek Szyprowski
2022-10-17 9:01 ` Marek Szyprowski
2022-10-17 9:01 ` Marek Szyprowski
2022-10-18 3:05 ` Jagan Teki
2022-10-18 3:05 ` Jagan Teki
2022-10-18 3:05 ` Jagan Teki
2022-10-28 12:12 ` Jagan Teki
2022-10-28 12:12 ` Jagan Teki
2022-10-28 12:12 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 02/10] drm: bridge: samsung-dsim: Lookup OF-graph or Child node devices Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:48 ` Marek Vasut
2022-10-15 21:48 ` Marek Vasut
2022-10-15 21:48 ` Marek Vasut
2022-10-17 2:52 ` Jagan Teki
2022-10-17 2:52 ` Jagan Teki
2022-10-17 2:52 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 03/10] drm: bridge: samsung-dsim: Mark PHY as optional Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:50 ` Marek Vasut
2022-10-15 21:50 ` Marek Vasut
2022-10-15 21:50 ` Marek Vasut
2022-10-05 15:13 ` [PATCH v7 04/10] drm: bridge: samsung-dsim: Handle proper DSI host initialization Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 05/10] drm: bridge: samsung-dsim: Add atomic_check Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:23 ` Marek Vasut
2022-10-15 21:23 ` Marek Vasut
2022-10-15 21:23 ` Marek Vasut
2022-10-17 3:54 ` Jagan Teki
2022-10-17 3:54 ` Jagan Teki
2022-10-17 3:54 ` Jagan Teki
2022-10-17 7:23 ` Marek Vasut
2022-10-17 7:23 ` Marek Vasut
2022-10-17 7:23 ` Marek Vasut
2022-10-17 7:51 ` Jagan Teki
2022-10-17 7:51 ` Jagan Teki
2022-10-17 7:51 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 06/10] drm: bridge: samsung-dsim: Add platform PLL_P (PMS_P) offset Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:56 ` Marek Vasut
2022-10-15 21:56 ` Marek Vasut
2022-10-15 21:56 ` Marek Vasut
2022-10-05 15:13 ` [PATCH v7 07/10] drm: bridge: samsung-dsim: Add atomic_get_input_bus_fmts Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 22:01 ` Marek Vasut
2022-10-15 22:01 ` Marek Vasut
2022-10-15 22:01 ` Marek Vasut
2022-10-17 3:58 ` Jagan Teki
2022-10-17 3:58 ` Jagan Teki
2022-10-17 3:58 ` Jagan Teki
2022-10-17 7:24 ` Marek Vasut
2022-10-17 7:24 ` Marek Vasut
2022-10-17 7:24 ` Marek Vasut
2022-11-03 7:40 ` Jagan Teki
2022-11-03 7:40 ` Jagan Teki
2022-11-03 7:40 ` Jagan Teki
2022-11-03 16:03 ` Marek Vasut
2022-11-03 16:03 ` Marek Vasut
2022-11-03 16:03 ` Marek Vasut
2022-11-03 9:39 ` Jagan Teki
2022-11-03 9:39 ` Jagan Teki
2022-11-03 9:39 ` Jagan Teki
2022-11-03 16:02 ` Marek Vasut
2022-11-03 16:02 ` Marek Vasut
2022-11-03 16:02 ` Marek Vasut
2022-11-03 17:27 ` Jagan Teki
2022-11-03 17:27 ` Jagan Teki
2022-11-03 17:27 ` Jagan Teki
2022-11-03 18:58 ` Marek Vasut
2022-11-03 18:58 ` Marek Vasut
2022-11-03 18:58 ` Marek Vasut
2022-11-07 17:00 ` Jagan Teki
2022-11-07 17:00 ` Jagan Teki
2022-11-07 17:00 ` Jagan Teki
2022-10-05 15:13 ` [PATCH v7 08/10] drm: bridge: samsung-dsim: Add input_bus_flags Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:37 ` Marek Vasut [this message]
2022-10-15 21:37 ` Marek Vasut
2022-10-15 21:37 ` Marek Vasut
2022-10-05 15:13 ` [PATCH v7 09/10] dt-bindings: display: exynos: dsim: Add NXP i.MX8MM support Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 22:02 ` Marek Vasut
2022-10-15 22:02 ` Marek Vasut
2022-10-15 22:02 ` Marek Vasut
2022-10-05 15:13 ` [PATCH v7 10/10] drm: bridge: samsung-dsim: Add " Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-05 15:13 ` Jagan Teki
2022-10-15 21:30 ` Marek Vasut
2022-10-15 21:30 ` Marek Vasut
2022-10-15 21:30 ` Marek Vasut
2022-10-05 20:51 ` [PATCH v7 00/10] drm: bridge: Add Samsung MIPI DSIM bridge Marek Szyprowski
2022-10-05 20:51 ` Marek Szyprowski
2022-10-05 20:51 ` Marek Szyprowski
2022-10-06 14:21 ` Jagan Teki
2022-10-06 14:21 ` Jagan Teki
2022-10-06 14:21 ` Jagan Teki
2022-10-06 15:26 ` Tim Harvey
2022-10-06 15:26 ` Tim Harvey
2022-10-06 15:26 ` Tim Harvey
2022-10-19 10:16 ` Marcel Ziswiler
2022-10-19 10:16 ` Marcel Ziswiler
2022-10-19 10:16 ` Marcel Ziswiler
2022-10-20 9:20 ` Robert Foss
2022-10-20 9:20 ` Robert Foss
2022-10-20 9:20 ` Robert Foss
2022-10-24 8:44 ` Alexander Stein
2022-10-24 8:44 ` Alexander Stein
2022-10-24 8:44 ` Alexander Stein
2022-10-28 14:37 ` Sébastien Szymanski
2022-10-28 14:37 ` Sébastien Szymanski
2022-10-28 14:37 ` Sébastien Szymanski
2022-11-07 16:34 ` Frieder Schrempf
2022-11-07 16:34 ` Frieder Schrempf
2022-11-07 16:34 ` Frieder Schrempf
2022-11-10 15:54 ` Fabio Estevam
2022-11-10 15:54 ` Fabio Estevam
2022-11-10 15:54 ` Fabio Estevam
2022-11-10 16:03 ` Jagan Teki
2022-11-10 16:03 ` Jagan Teki
2022-11-10 16:03 ` Jagan Teki
2022-11-10 16:59 ` Marek Vasut
2022-11-10 16:59 ` Marek Vasut
2022-11-10 16:59 ` Marek Vasut
2022-11-10 17:37 ` Jagan Teki
2022-11-10 17:37 ` Jagan Teki
2022-11-10 17:37 ` Jagan Teki
2022-11-10 17:41 ` Marek Vasut
2022-11-10 17:41 ` Marek Vasut
2022-11-10 17:41 ` Marek Vasut
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