From: Philippe CORNU <philippe.cornu@foss.st.com>
To: Antonio Borneo <antonio.borneo@foss.st.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Andrzej Hajda <a.hajda@samsung.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Robert Foss <robert.foss@linaro.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Yannick Fertre <yannick.fertre@foss.st.com>,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
<dri-devel@lists.freedesktop.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] drm/stm: dsi: provide the implementation of mode_valid()
Date: Tue, 4 Jan 2022 12:01:37 +0100 [thread overview]
Message-ID: <9a8beb43-7a59-f042-7b14-d6d2ea360b6f@foss.st.com> (raw)
In-Reply-To: <20211218215055.212421-3-antonio.borneo@foss.st.com>
On 12/18/21 10:50 PM, Antonio Borneo wrote:
> The dsi has several constraints on the video modes it can support,
> mainly due to the frequencies that can be generated by the PLL
> integrated in the DSI device.
>
> Verify that the required HS clock can be generated by the PLL.
>
> The dsi clock from the dsi PLL and the ltdc pixel clock are
> asynchronous. The dsi needs to return in LP mode during HFP or HBP
> to re-synchronize at each video line.
>
> Verify that the duration of HFP and HBP allows the dsi to enter in
> LP mode.
>
> Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
> ---
> To: David Airlie <airlied@linux.ie>
> To: Daniel Vetter <daniel@ffwll.ch>
> To: Andrzej Hajda <a.hajda@samsung.com>
> To: Neil Armstrong <narmstrong@baylibre.com>
> To: Robert Foss <robert.foss@linaro.org>
> To: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> To: Jonas Karlman <jonas@kwiboo.se>
> To: Jernej Skrabec <jernej.skrabec@gmail.com>
> To: Yannick Fertre <yannick.fertre@foss.st.com>
> To: Philippe Cornu <philippe.cornu@foss.st.com>
> To: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> To: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> To: Alexandre Torgue <alexandre.torgue@foss.st.com>
> To: Philipp Zabel <p.zabel@pengutronix.de>
> To: dri-devel@lists.freedesktop.org
> To: linux-stm32@st-md-mailman.stormreply.com
> To: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> ---
> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 98 +++++++++++++++++++++++++++
> 1 file changed, 98 insertions(+)
Hi Antonio,
many thanks for your patch.
Nice improvement for better filtering supported modes...
Acked-by: Philippe Cornu <philippe.cornu@foss.st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@foss.st.com>
Philippe :-)
next prev parent reply other threads:[~2022-01-04 11:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 21:50 [PATCH 1/3] drm/stm: dsi: move lane capability detection in probe() Antonio Borneo
2021-12-18 21:50 ` [PATCH 2/3] drm/bridge/synopsys: dsi: extend the prototype of mode_valid() Antonio Borneo
2022-01-04 10:55 ` Philippe CORNU
2021-12-18 21:50 ` [PATCH 3/3] drm/stm: dsi: provide the implementation " Antonio Borneo
2022-01-04 11:01 ` Philippe CORNU [this message]
2022-01-04 10:47 ` [PATCH 1/3] drm/stm: dsi: move lane capability detection in probe() Philippe CORNU
2022-01-04 11:56 ` Robert Foss
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