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Allwinner DRM changes for 4.12
Not any functional changes, but a lot of preliminary rework in order to
support multiple display pipelines.
* tag 'sunxi-drm-for-4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux: (26 commits)
MAINTAINERS: Add sun4i-drm git repo
drm/sun4i: Pass pointer for underlying backend into layer init
drm/sun4i: Pass pointers for associated backend and tcon into crtc init
drm/sun4i: tv: Get tcon and backend pointers from associated crtc
drm/sun4i: Use embedded tcon pointer to get the tcon's output port node
drm/sun4i: Fix tcon channel 0 comment about backporch = backporch + hsync
drm/sun4i: Fix TCON clock and regmap initialization sequence
drm/sun4i: Grab reserved memory region
drm/sun4i: Add backend and tcon pointers to sun4i_crtc
drm/sun4i: Add backend pointer to sun4i_layer
drm/sun4i: rgb: Pass tcon pointer when initializing RGB encoder
drm/sun4i: tv: Switch to drm_of_find_possible_crtcs
drm/sun4i: Drop hardcoded .possible_crtcs values from layers
drm/sun4i: Drop primary layer pointer from sun4i_drv
drm/sun4i: Initialize crtc from tcon bind function
drm/sun4i: Move layers from sun4i_drv to sun4i_crtc
drm/sun4i: Add end of list element for sun4i_layers_init's returned list
drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node
drm/sun4i: Make sunxi_rgb2yuv_coef constant
drm/sun4i: Make sun4i_crtc_init return ERR_PTR style error codes
...
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>
This patch moves the sun4i_layers_init call from sun4i_drv_bind to
sun4i_crtc_init, and the layers pointer from struct sun4i_drv to
struct sun4i_crtc.
The layers are bound to a specific crtc, and they are not directly
used once initiated. They are used through their included drm_plane
structures.
Moving the layers into the crtc facilitates binding them to the crtc
explicitly, by setting the corresponding bit in their .possible_crtcs
fields right after the crtc is initialized. This is done in a later
patch.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
sun4i_crtc_init can fail for a number of reasons. Instead of returning
a NULL pointer when it fails, pass back the encountered error using
ERR_PTR.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
drm_vblank_init can fail due to insufficient memory. Ignoring the error
and proceeding may cause the kernel to dereference an invalid pointer
when vblank is enabled.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The master bind function calls numerous drm functions which initialize
underlying structures. It also tries to bind the various components
of the display pipeline, some of which may add additional drm objects.
This patch adds proper cleanup functions in the error path of the
master bind function.
This requires the patch "drm/sun4i: Move drm_mode_config_cleanup call
to main driver", which splits out drm_mode_config_cleanup from
sun4i_framebuffer_free so we can call it separately.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
drm_mode_config_cleanup is the complement of drm_mode_config_init, which
is called in the bind function of sun4i_drv. drm_mode_config_cleanup
should be put in the unbind function to match.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
sun4i-drm changes for 4.10
Support for the Allwinner A31 SoC display engine using the sun4i-drm
driver.
* tag 'sunxi-drm-for-4.10' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
drm/sun4i: Add a few formats
drm/sun4i: Add compatible strings for A31/A31s display pipelines
drm/sun4i: Add compatible string for A31/A31s TCON (timing controller)
drm/sun4i: tcon: Move SoC specific quirks to a DT matched data structure
drm/sun4i: sun6i-drc: Support DRC on A31 and A31s
The A31's display pipeline has 2 frontends, 2 backends, and 2 TCONs. It
also has new display enhancement blocks, such as the DRC (Dynamic Range
Controller), the DEU (Display Enhancement Unit), and the CMU (Color
Management Unit). It supports HDMI, MIPI DSI, and 2 LCD/LVDS channels.
The A31s display pipeline is almost the same, just without MIPI DSI.
Only the TCON seems to be different, due to the missing mux for MIPI
DSI.
Add compatible strings for both of them.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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>
Allwinner DRM changes for 4.9
This tag adds the support of a new SoC to sun4i-drm (the Allwinner A33),
and the usual few fixes and enhancements
* tag 'sunxi-drm-for-4.9' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
drm/sun4i: add missing header dependencies
drm/sun4i: Add a DRC driver
drm/sun4i: backend: Handle the SAT
drm/sun4i: support A33 tcon
drm/sun4i: support TCONs without channel 1
drm/sun4i: Clear encoder->bridge if a bridge is not found
drm/sun4i: rgb: add missing calls to drm_panel_{prepare,unprepare}
drm/sun4i: Remove redundant dev_err call in sun4i_tcon_init_regmap()
drm/sun4i: Add bridge support
drm/sun4i: Move panel retrieval in RGB connector
drm/sun4i: Store TCON's device structure pointer
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>
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>
Suddenly everyone shows up with their trivial patch series!
- piles of if (!ptr) check removals from Markus Elfring
- more of_node_put fixes from Peter Chen
- make fbdev support really optional in all drivers (except vmwgfx),
somehow this fell through the cracks when we did all the hard prep work
a while ago. Patches from Tobias Jakobi.
- leftover patches for the connector reg/unreg cleanup (required that I
backmerged drm-next) from Chris
- last vgem fence patch from Chris
- fix up warnings in the new sphinx gpu docs build
- misc other small bits
* tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel: (57 commits)
GPU-DRM-Exynos: Delete an unnecessary check before the function call "vunmap"
GPU-DRM-sun4i: Delete an unnecessary check before drm_fbdev_cma_hotplug_event()
drm/atomic: Delete an unnecessary check before drm_property_unreference_blob()
drm/rockchip: analogix_dp: add missing clk_disable_unprepare() on error
drm: drm_connector->s/connector_id/index/ for consistency
drm/virtio: Fix non static symbol warning
drm/arc: Remove redundant dev_err call in arcpgu_load()
drm/arc: Fix some sparse warnings
drm/vgem: Fix non static symbol warning
drm/doc: Spinx leftovers
drm/dp-mst: Missing kernel doc
drm/dp-mst: Remove tx_down_in_progress
drm/doc: Fix missing kerneldoc for drm_dp_helper.c
drm: Extract&Document drm_irq.h
drm/doc: document all the properties in drm_mode_config
drm/drm-kms.rst: Remove unused drm_fourcc.h include directive
drm/doc: Add kerneldoc for @index
drm: Unexport drm_connector_unregister_all()
drm/sun4i: Remove redundant call to drm_connector_unregister_all()
drm/ttm: Delete an unnecessary check before the function call "ttm_tt_destroy"
...
The sun4i display engine doesn't have any vblank counter. Use the proper
helper for that.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
If simplefb was setup by our bootloader and enabled in the DT, we will have
a first framebuffer loaded in our system.
However, as soon as our DRM driver will load, it will reset the controller,
initialise it and, if the framebuffer emulation is enabled, register a
second framebuffer device.
This is obviously pretty bad, since the first framebuffer will be some kind
of a black hole, with memory still reserved that we can write to safely,
but not displayed anywhere.
Make sure we remove that framebuffer when we probe so we don't end up in
that situation.
Fixes: 9026e0d122 ("drm: Add Allwinner A10 Display Engine support")
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>
