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Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to bridge directory

From Guenter Roeck <linux@roeck-us.net>
Newsgroups linux.kernel
Subject Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to bridge directory
Date 2016-03-30 22:40 +0200
Message-ID <riv4e-2lN-15@gated-at.bofh.it> (permalink)
References <r2pmb-aS-45@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi,

On Mon, Feb 15, 2016 at 07:09:36PM +0800, Yakir Yang wrote:
> Split the dp core driver from exynos directory to bridge directory,
> and rename the core driver to analogix_dp_*, rename the platform
> code to exynos_dp.
> 
> Beside the new analogix_dp driver would export six hooks.
> "analogix_dp_bind()" and "analogix_dp_unbind()"
> "analogix_dp_suspned()" and "analogix_dp_resume()"
> "analogix_dp_detect()" and "analogix_dp_get_modes()"
> 
> The bind/unbind symbols is used for analogix platform driver to connect
> with analogix_dp core driver. And the detect/get_modes is used for analogix
> platform driver to init the connector.
> 
> They reason why connector need register in helper driver is rockchip drm
> haven't implement the atomic API, but Exynos drm have implement it, so
> there would need two different connector helper functions, that's why we
> leave the connector register in helper driver.
> 
> Signed-off-by: Yakir Yang <ykk@rock-chips.com>
> 
[ ... ]

> diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
> new file mode 100644
> index 0000000..9107b86
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/analogix/Makefile
> @@ -0,0 +1 @@
> +obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp_core.o analogix_dp_reg.o

This results in the following build errors if DRM_ANALOGIX_DP
is configured as module.

ERROR: "analogix_dp_start_video" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_lane0_link_training" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_lane1_link_training" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_lane2_link_training" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_lane3_link_training" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_lane_count" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!
ERROR: "analogix_dp_get_link_bandwidth" [drivers/gpu/drm/bridge/analogix/analogix_dp_core.ko] undefined!

[ and so on ]

It should probably be something like

analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o
obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o

Guenter

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Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to  bridge directory Guenter Roeck <linux@roeck-us.net> - 2016-03-30 22:40 +0200
  Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to  bridge directory Thierry Reding <treding@nvidia.com> - 2016-03-31 12:00 +0200
    Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to  bridge directory Doug Anderson <dianders@chromium.org> - 2016-03-31 18:10 +0200
  Re: [v14, 01/17] drm: bridge: analogix/dp: split exynos dp driver to  bridge directory Doug Anderson <dianders@chromium.org> - 2016-03-31 18:00 +0200

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