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Message-ID: <1567002587.3209.122.camel@nxp.com>
Date: Wed, 28 Aug 2019 14:29:48 +0000
From: Robert Chiras <robert.chiras@....com>
To: dl-linux-imx <linux-imx@....com>,
"narmstrong@...libre.com" <narmstrong@...libre.com>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
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"mark.rutland@....com" <mark.rutland@....com>,
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<Laurent.pinchart@...asonboard.com>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
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Subject: Re: [EXT] [PATCH v3 0/2] drm: bridge: Add NWL MIPI DSI host
controller support
Hi Guido,
I tested this on my setup and it works. My DSI panel is a little bit
different and it doesn't work with this as-is, but I added some
improvements on top of this, in order to be able to setup the clocks.
The changes I made can arrive on top of this as improvements, of
course, since it will allow this driver to dinamically set the
video_pll clock for any kind of mode.
So, for the whole patch-set, you can add:
Tested-by: Robert Chiras <robert.chiras@....com>
Signed-off-by: Robert Chiras <robert.chiras@....com>
Best regards,
Robert
On Jo, 2019-08-22 at 12:44 +0200, Guido Günther wrote:
> This adds initial support for the NWL MIPI DSI Host controller found
> on i.MX8
> SoCs.
>
> It adds support for the i.MX8MQ but the same IP core can also be
> found on e.g.
> i.MX8QXP. I added the necessary hooks to support other imx8 variants
> but since
> I only have imx8mq boards to test I omitted the platform data for
> other SoCs.
>
> The code is based on NXPs BSP so I added Robert Chiras as
> Co-authored-by. Robert, if this looks sane could you add your
> Signed-off-by:?
>
> The most notable changes over the BSP driver are
> - Calculate HS mode timing from phy_configure_opts_mipi_dphy
> - Perform all clock setup via DT
> - Merge nwl-imx and nwl drivers
> - Add B0 silion revision quirk
> - become a bridge driver to hook into mxsfb (from what I read[0]
> DCSS, which
> also can drive the nwl on the imx8mq will likely not become part
> of
> imx-display-subsystem so it makes sense to make it drive a bridge
> for dsi as
> well).
> - Use panel_bridge to attach the panel
> - Use multiplex framework instead of accessing syscon directly
>
> This has been tested on a Librem 5 devkit using mxsfb with Robert's
> patches[1]
> and the rocktech-jh057n00900 panel driver on next-20190821. The DCSS
> can later
> on also act as input source too.
>
> Changes from v2:
> - Per review comments by Rob Herring
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> August%2F230448.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C757
> 201f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%
> 7C0%7C637020674654566414&sdata=JdvAdCPGq2CTsW%2BgXgnAVltWMIfdCDQn
> dXSLYpnjEH8%3D&reserved=0
> - bindings:
> - Simplify by restricting to fsl,imx8mq-nwl-dsi
> - document reset lines
> - add port@{0,1}
> - use a real compatible string for the panel
> - resets are required
> - Per review comments by Arnd Bergmann
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> August%2F230868.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C757
> 201f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%
> 7C0%7C637020674654566414&sdata=LyJpZjQjMCe5zUdvK8CD8ETucLPxx621gW
> xtpAr8DM4%3D&reserved=0
> - Don't access iomuxc_gpr regs directly. This allows us to drop the
> first patch in the series with the iomuxc_gpr field defines.
> - Per review comments by Laurent Pinchart
> - Fix wording in bindings
> - Add mux-controls to bindings
> - Don't print error message on dphy probe deferal
>
> Changes from v1:
> - Per review comments by Sam Ravnborg
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> July%2F228130.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C75720
> 1f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C
> 0%7C637020674654566414&sdata=AU2gzIwrbCdIBZenPWWYYX%2BgdX53zc2%2B
> SQhZbuN%2FWpU%3D&reserved=0
> - Change binding docs to YAML
> - build: Don't always visit imx-nwl/
> - build: Add header-test-y
> - Sort headers according to DRM convention
> - Use drm_display_mode instead of videmode
> - Per review comments by Fabio Estevam
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> July%2F228299.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C75720
> 1f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C
> 0%7C637020674654566414&sdata=6kpIZ6iNAQ13fMXU6sqENLwy%2FdIWL6ef8j
> gyas7I0CQ%3D&reserved=0
> - Don't restrict build to ARCH_MXC
> - Drop unused includes
> - Drop unreachable code in imx_nwl_dsi_bridge_mode_fixup()
> - Drop remaining calls of dev_err() and use DRM_DEV_ERR()
> consistently.
> - Use devm_platform_ioremap_resource()
> - Drop devm_free_irq() in probe() error path
> - Use single line comments where sufficient
> - Use <linux/time64.h> instead of defining USEC_PER_SEC
> - Make input source select imx8 specific
> - Drop <asm/unaligned.h> inclusion (after removal of
> get_unaligned_le32)
> - Drop all EXPORT_SYMBOL_GPL() for functions used in the same
> module
> but different source files.
> - Drop nwl_dsi_enable_{rx,tx}_clock() by invoking
> clk_prepare_enable()
> directly
> - Remove pointless comment
> - Laurent Pinchart
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> July%2F228313.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C75720
> 1f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C
> 0%7C637020674654566414&sdata=tDlVGeET1CPMH9W%2FqmnePNR51vNaTKD%2F
> iFOoR9%2FmESc%3D&reserved=0
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fl
> ists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> July%2F228308.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C75720
> 1f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C
> 0%7C637020674654566414&sdata=NsLGAL8%2BcOC0ZZxxeoGe7VxQCgqSBEN4G3
> WVGOeZpCo%3D&reserved=0
> - Drop (on iMX8MQ) unused csr regmap
> - Use NWL_MAX_PLATFORM_CLOCKS everywhere
> - Drop get_unaligned_le32() usage
> - remove duplicate 'for the' in binding docs
> - Don't include unused <linux/clk-provider.h>
> - Don't include unused <linux/component.h>
> - Drop dpms_mode for tracking state, trust the drm layer on that
> - Use pm_runtime_put() instead of pm_runtime_put_sync()
> - Don't overwrite encoder type
> - Make imx_nwl_platform_data const
> - Use the reset controller API instead of open coding that platform
> specific
> part
> - Use <linux/bitfield.h> intead of making up our own defines
> - name mipi_dsi_transfer less generic: nwl_dsi_transfer
> - ensure clean in .remove by calling mipi_dsi_host_unregister.
> - prefix constants by NWL_DSI_
> - properly format transfer_direction enum
> - simplify platform clock handling
> - Don't modify state in mode_fixup() and use mode_set() instead
> - Drop bridge detach(), already handle by nwl_dsi_host_detach()
> - Drop USE_*_QUIRK() macros
> - Drop (for now) unused clock defnitions. 'pixel' and 'bypass' clock
> will be
> used for i.MX8 SoCs but since they're unused atm drop the
> definitions - but
> keep the logic to enable/disable several clocks in place since we
> know we'll
> need it in the future.
>
> Changes from v0:
> - Add quirk for IMQ8MQ silicon B0 revision to not mess with the
> system reset controller on power down since enable() won't work
> otherwise.
> - Drop devm_free_irq() handled by the device driver core
> - Disable tx esc clock after the phy power down to unbreak
> disable/enable (unblank/blank)
> - Add ports to dt binding docs
> - Select GENERIC_PHY_MIPI_DPHY instead of GENERIC_PHY for
> phy_mipi_dphy_get_default_config
> - Select DRM_MIPI_DSI
> - Include drm_print.h to fix build on next-20190408
> - Drop some debugging messages
> - Newline terminate all DRM_ printouts
> - Turn component driver into a drm bridge
>
> [0]: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%
> 2Flists.freedesktop.org%2Farchives%2Fdri-devel%2F2019-
> May%2F219484.html&data=02%7C01%7Crobert.chiras%40nxp.com%7C757201
> f9aaa54653580e08d726edb290%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0
> %7C637020674654566414&sdata=4IVjhLy3a2XxZ4jYwDFD23D%2BvwAVAEj44hY
> fvvp8OpQ%3D&reserved=0
> [1]: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%
> 2Fpatchwork.freedesktop.org%2Fseries%2F62822%2F&data=02%7C01%7Cro
> bert.chiras%40nxp.com%7C757201f9aaa54653580e08d726edb290%7C686ea1d3bc
> 2b4c6fa92cd99c5c301635%7C0%7C0%7C637020674654566414&sdata=GueUBOc
> baGjWtWcMYBplL6ki2UbgaFPkQHg%2F6eReiYg%3D&reserved=0
>
> To: David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
> Rob Herring <robh+dt@...nel.org>, Mark Rutland <mark.rutland@....com>
> , Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.
> de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <
> festevam@...il.com>, NXP Linux Team <linux-imx@....com>, Andrzej
> Hajda <a.hajda@...sung.com>, Neil Armstrong <narmstrong@...libre.com>
> , Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman
> <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...l.net>, Lee
> Jones <lee.jones@...aro.org>, Guido Günther <agx@...xcpu.org>, dri-de
> vel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-arm-kern
> el@...ts.infradead.org, linux-kernel@...r.kernel.org, Robert Chiras <
> robert.chiras@....com>, Sam Ravnborg <sam@...nborg.org>, Fabio
> Estevam <festevam@...il.com>, Arnd Bergmann <arnd@...db.de>
>
>
> Guido Günther (2):
> dt-bindings: display/bridge: Add binding for NWL mipi dsi host
> controller
> drm/bridge: Add NWL MIPI DSI host controller support
>
> .../bindings/display/bridge/nwl-dsi.yaml | 155 ++++
> drivers/gpu/drm/bridge/Kconfig | 2 +
> drivers/gpu/drm/bridge/Makefile | 1 +
> drivers/gpu/drm/bridge/nwl-dsi/Kconfig | 16 +
> drivers/gpu/drm/bridge/nwl-dsi/Makefile | 4 +
> drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c | 501 +++++++++++++
> drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h | 65 ++
> drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c | 700
> ++++++++++++++++++
> drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.h | 112 +++
> 9 files changed, 1556 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/Kconfig
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/Makefile
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c
> create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.h
>
> --
> 2.20.1
>
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