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| author |   Thomas Zimmermann <tzimmermann@suse.de> | 2022-07-28 14:40:59 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-07-29 16:01:47 +0200 |
| commit | 8aeeb3144fe27b2b8aa30db262de2f654f2edb9a (patch) | |
| tree | dd00892e470583818ec1c78890e6261466a3c09b /drivers/gpu/drm/mgag200/mgag200_drv.h | |
| parent | drm/mgag200: Add per-device callbacks (diff) | |
| download | wireguard-linux-8aeeb3144fe27b2b8aa30db262de2f654f2edb9a.tar.xz wireguard-linux-8aeeb3144fe27b2b8aa30db262de2f654f2edb9a.zip | |
drm/mgag200: Provide per-device callbacks for BMC synchronization
Move the BMC-related code into its own file and wire it up with device
callbacks.
While programming a new display mode, G200EW3 and G200WB have to de-
synchronize with the BMC. Synchronization is done via VIDRST pins
and controlled via VRSTEN and HRSTEN bits. Move the BMC code behind
a serviceable interface and call it from the CRTC's enable and
disable functions.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Tested-by: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728124103.30159-11-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_drv.h')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_drv.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h index db29eef8981b..e78c1b2f5c27 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.h +++ b/drivers/gpu/drm/mgag200/mgag200_drv.h @@ -263,6 +263,17 @@ struct mgag200_device_info { } struct mgag200_device_funcs { + /* + * Disables an external reset source (i.e., BMC) before programming + * a new display mode. + */ + void (*disable_vidrst)(struct mga_device *mdev); + + /* + * Enables an external reset source (i.e., BMC) after programming + * a new display mode. + */ + void (*enable_vidrst)(struct mga_device *mdev); }; struct mga_device { @@ -354,6 +365,10 @@ resource_size_t mgag200_device_probe_vram(struct mga_device *mdev); void mgag200_init_registers(struct mga_device *mdev); int mgag200_modeset_init(struct mga_device *mdev, resource_size_t vram_fb_available); + /* mgag200_bmc.c */ +void mgag200_bmc_disable_vidrst(struct mga_device *mdev); +void mgag200_bmc_enable_vidrst(struct mga_device *mdev); + /* mgag200_i2c.c */ int mgag200_i2c_init(struct mga_device *mdev, struct mga_i2c_chan *i2c); |