litmus-rt-ext-res.git/drivers/gpu/drm/fsl-dcu, branch EXT-RES

drm/fsl-dcu: disable planes before disabling CRTC

2016-11-09T01:14:08+00:00

After disabling and reenabling the CRTC the DCU sometimes got stuck
displaying the whole screen with a solid color. Disabling and
reenabling the CRTC did not recover from the situation. This was
often reproducable by just restarting the X-Server.

The disabling sequence is not explicitly documented. But it turns
out that disabling the planes before disabling the CRTC seems to
prevent the above situation from happening.

Use the callback ->atomic_disable instead of ->disable which allows
to use the drm_atomic_helper_disable_planes_on_crtc() helper to
disable planes before disabling the controller.

Signed-off-by: Stefan Agner

drm/fsl-dcu: update all registers on flush

2016-11-09T01:14:08+00:00

Use the UPDATE_MODE READREG bit to initiate a register transfer
on flush. This makes sure that we flush all registers only once
for all planes.

Signed-off-by: Stefan Agner

drm/fsl-dcu: do not update when modifying irq registers

2016-11-09T01:14:08+00:00

The IRQ status and mask registers are not "double buffered" according
to the reference manual. Hence, there is no extra transfer/update
write needed when modifying these registers.

Signed-off-by: Stefan Agner

drm/fsl-dcu: enable pixel clock when enabling CRTC

2016-10-20T00:03:02+00:00

The pixel clock should not be on if the CRTC is not in use, hence
move clock enable/disable calls into CRTC callbacks.

Signed-off-by: Stefan Agner 
Tested-By: Meng Yi

drm/fsl-dcu: do not transfer registers in mode_set_nofb

2016-10-20T00:02:59+00:00

Do not schedule a transfer of mode settings early. Modes should
get applied on on CRTC enable where we also enable the pixel clock.

Signed-off-by: Stefan Agner 
Tested-By: Meng Yi

drm/fsl-dcu: do not transfer registers on plane init

2016-10-20T00:02:54+00:00

There is no need to explicitly initiate a register transfer and
turn off the DCU after initializing the plane registers. In fact,
this is harmful and leads to unnecessary flickers if the DCU has
been left on by the bootloader.

Signed-off-by: Stefan Agner 
Tested-By: Meng Yi

drm/fsl-dcu: enable TCON bypass mode by default

2016-10-20T00:01:51+00:00

Do not use encoder disable/enable callbacks to control bypass
mode as this seems to mess with the signals not liked by
displays. This also makes more sense since the encoder is
already defined to be parallel RGB/LVDS at creation time.

Signed-off-by: Stefan Agner 
Tested-By: Meng Yi

Merge tag 'topic/drm-misc-2016-09-25' of git://anongit.freedesktop.org/drm-intel into drm-next

2016-09-28T00:28:23+00:00

- more core cleanup patches to prep drm_file to be used for
  kernel-internal contexts (David Herrmann)
- more split-up+docs for drm_crtc.c
- lots of small fixes and polish all over

* tag 'topic/drm-misc-2016-09-25' of git://anongit.freedesktop.org/drm-intel: (37 commits)
  drm: bridge: analogix/dp: mark symbols static where possible
  drm/bochs: mark bochs_connector_get_modes() static
  drm/bridge: analogix_dp: Improve panel on time
  drm/bridge: analogix_dp: Don't read EDID if panel present
  drm/bridge: analogix_dp: Remove duplicated code
  Revert "drm/i2c: tda998x: don't register the connector"
  drm: Fix plane type uabi breakage
  dma-buf/sync_file: free fences array in num_fences is 1
  drm/i2c: tda998x: don't register the connector
  drm: Don't swallow error codes in drm_dev_alloc()
  drm: Distinguish no name from ENOMEM in set_unique()
  drm: Remove dirty property from docs
  drm/doc: Document color space handling
  drm: Extract drm_color_mgmt.[hc]
  drm/doc: Polish plane composition property docs
  drm: Conslidate blending properties in drm_blend.[hc]
  drm/doc: Polish for drm_plane.[hc]
  drm: Extract drm_plane.[hc]
  drm/tilcdc: Add atomic and crtc headers to crtc.c
  drm: Fix typo in encoder docs
  ...

drm: Don't swallow error codes in drm_dev_alloc()

2016-09-22T11:03:48+00:00

There are many reasons other than ENOMEM that drm_dev_init() can
fail. Return ERR_PTR rather than NULL to be able to distinguish
these in the caller.

Signed-off-by: Tom Gundersen 
Signed-off-by: Sean Paul 
Link: http://patchwork.freedesktop.org/patch/msgid/20160921145919.13754-2-teg@jklm.no

drm/fsl-dcu: disable clock on error path

2016-09-05T19:32:55+00:00

In fsl_dcu_drm_pm_resume() we should disable the previously enabled
clock (fsl_dev->clk) when enabling fsl_dev->pix_clk fails.

Signed-off-by: Fabio Estevam 
Signed-off-by: Stefan Agner