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sun4i_crtc controls the backend and tcon hardware blocks of the display
pipeline.
Pass pointers to the underlying devices into the crtc init function,
instead of trying to fetch them from the drm_device structure. This
avoids the headache of trying to figure out which devices the crtc
is actually associated with.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The backporch programmed into the tcon registers is actually the
backporch + hsync length from the display timings, as indicated in
the interface timing diagrams found in the user manual of the A31
and A33 SoCs.
The comments for channel 0 mistakenly describe the discrepancy as
TCON backporch = frontporch + hsync.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The TCON driver calls sun4i_tcon_init_regmap and sun4i_tcon_init_clocks
in its bind function. The former creates a regmap and writes to several
register to clear its configuration to a known default. The latter
initializes various clocks. This includes enabling the bus clock for
register access and creating the dotclock.
In order for the first step's writes to work, the bus clock must be
enabled which is done in the second step. but the dotclock's ops use
the regmap created in the first step.
Rearrange the function calls such that the clocks are initialized before
the regmap, and split out the dot clock creation to after the regmap is
initialized.
Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The RGB encoder represents channel 0 of the TCON. Instead of fetching
the pointer to its TCON from the main sun4i_drv structure, pass it in
as part of the init call, save it, and use it directly in the encoder
and connector callbacks.
We can also drop the otherwise unused sun4i_drv pointer.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The tcon provides part of the functionality of the crtc, and also
provides the device node for the output port of the crtc. To be able
to use drm_of_find_possible_crtcs(), all crtc must be initialized before
any downstream encoders. The other part of the crtc is the display
backend.
The Rockchip DRM driver does this by first binding all vops, which is
their crtc, and this step also creates the crtc objects. Then all
remaining hardware components are bound. With the Allwinner display
pipeline, we have multiple components comprising the crtc, and varying
depths of the display pipeline. Since components are added with a depth
first search of the of_graph, we can initialize the crtc object within
the tcon bind function. Since the backend precedes the tcon, and the
backends cannot be muxed or switched around, we can be sure that the
associated backend is already initialized.
This patch also moves the crtc pointer from the main drm_device data to
the tcon device data. Besides the crtc callbacks, the crtc structure is
only used within the tcon driver to signal vblank events from its
interrupt handler.
As the crtc and layer bits are now called from the tcon bits, we must
move them from the sun4i-drm module to the sun4i-tcon module to avoid
circular dependencies between the two modules. This is because sun4i-drm
also calls into sun4i-tcon.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Another pile of misc:
- Explicit fencing for atomic! Big thanks to Gustavo, Sean, Rob 3x, Brian
and anyone else I've forgotten to make this happen.
- roll out fbdev helper ops to drivers (Stefan Christ)
- last bits of drm_crtc split-up&kerneldoc
- some drm_irq.c crtc functions cleanup
- prepare_fb helper for cma, works correctly with explicit fencing (Marek
Vasut)
- misc small patches all over
* tag 'drm-misc-next-2016-11-16' of git://anongit.freedesktop.org/git/drm-misc: (51 commits)
drm/fence: add out-fences support
drm/fence: add fence timeline to drm_crtc
drm/fence: add in-fences support
drm/bridge: analogix_dp: return error if transfer none byte
drm: drm_irq.h header cleanup
drm/irq: Unexport drm_vblank_on/off
drm/irq: Unexport drm_vblank_count
drm/irq: Make drm_vblank_pre/post_modeset internal
drm/nouveau: Use drm_crtc_vblank_off/on
drm/amdgpu: Use drm_crtc_vblank_on/off for dce6
drm/color: document NULL values and default settings better
drm: Drop externs from drm_crtc.h
drm: Move tile group code into drm_connector.c
drm: Extract drm_mode_config.[hc]
Revert "drm: Add aspect ratio parsing in DRM layer"
Revert "drm: Add and handle new aspect ratios in DRM layer"
drm/print: Move kerneldoc next to definition
drm: Consolidate dumb buffer docs
drm: Clean up kerneldoc for struct drm_driver
drm: Extract drm_drv.h
...
These component_ops structures are only used as the second argument to
component_add and component_del, which are declared as const, so the
structures can be declared as const as well.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct component_ops i@p = { ... };
@ok1@
identifier r.i;
expression e1;
position p;
@@
component_add(e1,&i@p)
@ok2@
identifier r.i;
expression e1;
position p;
@@
component_del(e1, &i@p)
@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct component_ops e;
@@
e@i@p
@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct component_ops i = { ... };
// </smpl>
The result of the size command before the change is (arm):
text data bss dec hex filename
5266 236 8 5510 1586 sun4i_backend.o
6393 236 8 6637 19ed sun4i_tcon.o
3700 368 8 4076 fec sun4i_tv.o
1668 108 0 1776 6f0 sun6i_drc.o
and after the change:
text data bss dec hex filename
5274 228 8 5510 1586 sun4i_backend.o
6401 228 8 6637 19ed sun4i_tcon.o
3708 360 8 4076 fec sun4i_tv.o
1676 100 0 1776 6f0 sun6i_drc.o
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1478971198-3659-1-git-send-email-Julia.Lawall@lip6.fr
The A31 TCON has mux controls for how TCON outputs are routed to the
HDMI and MIPI DSI blocks.
Since the A31s does not have MIPI DSI, it only has a mux for the HDMI
controller input.
This patch only adds support for the compatible strings. Actual support
for the mux controls should be added with HDMI and MIPI DSI support.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We already have some differences between the 2 supported SoCs.
More will be added as we support other SoCs. To avoid bloating
the probe function with even more conditionals, move the quirks
to a separate data structure that's tied to the compatible string.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The A33 has a significantly different pipeline, with components that differ
too.
Make sure we had compatible for them.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Some Allwinner SoCs, such as the A33, have a variation of the TCON that
doesn't have a second channel (or it is not wired to anything).
Make sure we can handle that case.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Our RGB bus can be either connected to a bridge or a panel. While the panel
support was already there, the bridge was not.
Fix that.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
In order to properly support bridges and use drm_encoder's bridge pointer,
move the panel (and bridge eventually) retrieval code in the RGB output
init function.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We will need to access TCON's struct device from outside of TCON's driver
bind function. Store it in our private structure.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
sun4i_rgb_init() can fail, which results in TCON failing to bind.
In this case we need to do cleanup, specificly unregistering the
dotclock, which is regmap based, and the regmap is registered as
part of the sun4i_tcon_bind().
Failing to do so results in a NULL pointer reference when the CCF
tries to turn off unused clocks.
Fixes: 29e57fab97fc ("drm: sun4i: Add RGB output")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Our code currently defers our probe on any error, even if we were not
expecting to have one at all.
Make sure we return -EPROBE_DEFER only when we were supposed to have a
panel, but it's not probed yet.
Also fix a typo while we're at it.
Fixes: 29e57fab97fc ("drm: sun4i: Add RGB output")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
One of the A10 display pipeline possible output is an RGB interface to
drive LCD panels directly. This is done through the first channel of the
TCON that will output our video signals directly.
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The Allwinner A10 and subsequent SoCs share the same display pipeline, with
variations in the number of controllers (1 or 2), or the presence or not of
some output (HDMI, TV, VGA) or not.
Add a driver with a limited set of features for now, and we will hopefully
support all of them eventually
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
