Hi, On Fri, Mar 20, 2020 at 07:49:08PM +0100, Guido Günther wrote: > This adds initial support for the NWL MIPI DSI Host controller found on i.MX8 > SoCs. Is there anything in can do to get this into drm-misc? Cheers, -- Guido > > 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. > > 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 / dcss > 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 mainline rocktech-jh057n00900 DSI panel driver on next-20200317 and on > the Librem5 with the a Mantix MLAF057WE51-X DSI panel driver (not yet mainline) > The DCSS (submitted for mainline inclusion now too) can also act as input > source. > > Changes from v10: > - Per review comments by Sam Ravnborg > https://lore.kernel.org/dri-devel/20200318214639.GA971@xxxxxxxxxxxx/ > - Drop header-test-y since kernel lost support > - Handle drm_bridge_attach's new flags argument > - Add Acked-by: to binding patch, thanks! > - Move to next-20200319 > > Changes from v9: > - Per review comments by Robert Chiras > https://lore.kernel.org/dri-devel/1575366594.6423.61.camel@xxxxxxx/ > - don't mix DSI host and bridge initialization > - only select output source once > - defer probe when panel is not ready to fix usage as a module > - use correct reset sequence as described by Robert > (and provided by NWL) > - use mode->clock instead of mode->crtc_clock > - Add tested by from Martin Kepplinger, thanks! > - Drop platform specific data (as suggested previously by Laurent Pinchart and > Andrzej Hajda) since imx8q* needs another set of abstractions with the new > reset sequence and that's easier to do when adding imx8q* support rather then > adding wrong abstraction now. > - Update bindings to use proper clock and irq names to make the example match > reality more closely. > - Use `fallthrough;` instead of /* Fall through */ in switch statements > - Move to next-20200226 > > Changes from v8: > - Drop reset quirk. It's not needed with mxsfb and sometimes triggers a shifted display. > > Changes from v7: > - Per review comments by Andrzej Hajda > https://lore.kernel.org/linux-arm-kernel/c86b7ca2-7799-eafd-c380-e4b551520837@xxxxxxxxxxx/ > - Drop spare empty line > - handle nwl_dsi_write errors > - better handle read errors > - unwind in case of error in nwl_dsi_enable > - use bridge_to_dsi() instead of accessing driver_private > - don't log on -EPROBEDEFER when fething the reset controller > - use endpoint number to determine input > - Spotted by kbuild test robot <lkp@xxxxxxxxx> > https://lore.kernel.org/linux-arm-kernel/201909230644.qfSKbNf9%25lkp@xxxxxxxxx/ > Use signed return type for nwl_dsi_get_dpi_pixel_format > - Drop connector type from drm_panel_bridge_add > - Don't forget to set an error value on dsi reads > > Changes from v5: > - Per review comments by Andrzej Hajda > https://lists.freedesktop.org/archives/dri-devel/2019-September/235281.html > - Fix include file ordering > - Add a comment to nwl_dsi_platform_data that will allow to add support > at least for the i.MX8QM > - Merge driver into a single file plus the register defs in a separate header > - Make more functions and structs static > > Changes from v4: > - Collect Reviewed-by: from Rob Herring, thanks! > https://lists.freedesktop.org/archives/dri-devel/2019-September/233979.html > - Spotted by kbuild test robot <lkp@xxxxxxxxx> > https://lists.freedesktop.org/archives/dri-devel/2019-September/233860.html > https://lists.freedesktop.org/archives/dri-devel/2019-September/233863.html > - fix format string for size_t > - Use DIV64_U64_ROUND_UP to fix build on 32 bit architectures > We can't use simple shift sind d and n are similar in size and > we need full precision > - Fix debug cfg_t_post debug print out > - Avoid PSEC_PER_SEC > - Move timeout / overflow handling out of nwl_dsi_finish_transmission, > it would never end up being reported since the call to the function > was guarded by flags. > - Drop 'support for' from KConfig title to make it match the other > drivers in that submenu > > Changes from v3: > - Per review comments by Robert Chiras > https://lists.freedesktop.org/archives/dri-devel/2019-August/232580.html > - Add Robert's {Signed-off,Tested}-by: > - Respect number of lanes when calculting bandwidth limits > - Drop duplicate NWL_DSI_ENABLE_MULT_PKTS setup > - Per testing by Rober Chiras > https://lists.freedesktop.org/archives/dri-devel/2019-August/233688.html > - Drop duplicate (and too early) drm_bridge_add() in nwl_dsi_probe() that > made mxsfb fail to connect to the bridge since the panel_bridge was not up > yet. drm_bridge_add() happens in nwl_dsi_host_attach() where after the > panel_bridge was set up. > - Per review comments by Rob Herring on bindings > https://lists.freedesktop.org/archives/dri-devel/2019-August/233196.html > - drop description from power-domains and resets > - allow BSD 2 clause license as well > - make ports more specific > - add #address-cells, #size-cells as required > - use additionalProperties > - panel is of type object > > Changes from v2: > - Per review comments by Rob Herring > https://lists.freedesktop.org/archives/dri-devel/2019-August/230448.html > - 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://lists.freedesktop.org/archives/dri-devel/2019-August/230868.html > - 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 deferral > > Changes from v1: > - Per review comments by Sam Ravnborg > https://lists.freedesktop.org/archives/dri-devel/2019-July/228130.html > - 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://lists.freedesktop.org/archives/dri-devel/2019-July/228299.html > - 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://lists.freedesktop.org/archives/dri-devel/2019-July/228313.html > https://lists.freedesktop.org/archives/dri-devel/2019-July/228308.html > - 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://lists.freedesktop.org/archives/dri-devel/2019-May/219484.html > [1]: https://patchwork.freedesktop.org/series/62822/ > > 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 | 216 +++ > drivers/gpu/drm/bridge/Kconfig | 16 + > drivers/gpu/drm/bridge/Makefile | 1 + > drivers/gpu/drm/bridge/nwl-dsi.c | 1218 +++++++++++++++++ > drivers/gpu/drm/bridge/nwl-dsi.h | 144 ++ > 5 files changed, 1595 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml > create mode 100644 drivers/gpu/drm/bridge/nwl-dsi.c > create mode 100644 drivers/gpu/drm/bridge/nwl-dsi.h > > -- > 2.23.0 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel
