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path: root/drivers/gpu/drm/sun4i/sun4i_drv.h
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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22drm/sun4i: Add a driver for the display frontendMaxime Ripard
The display frontend is an hardware block that can be used to implement some more advanced features like hardware scaling or colorspace conversions. It can also be used to implement the output format of the VPU. Let's create a minimal driver for it that will only enable the hardware scaling features. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/029cdc3478bf89d422f5e8d9e600baf5e48ce4db.1516613040.git-series.maxime.ripard@free-electrons.com
2017-12-08drm/sun4i: Use drm_fb_cma_fbdev_init/fini()Noralf Trønnes
Use drm_fb_cma_fbdev_init() and drm_fb_cma_fbdev_fini() which relies on the fact that drm_device holds a pointer to the drm_fb_helper structure. This means that the driver doesn't have to keep track of that. Also use the drm_fb_helper functions directly. Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171115142001.45358-15-noralf@tronnes.org
2017-06-01drm/sun4i: abstract a engine typeIcenowy Zheng
As we are going to add support for the Allwinner DE2 engine in sun4i-drm driver, we will finally have two types of display engines -- the DE1 backend and the DE2 mixer. They both do some display blending and feed graphics data to TCON, and is part of the "Display Engine" called by Allwinner, so I choose to call them both "engine" here. Abstract the engine type to a new struct with an ops struct, which contains functions that should be called outside the engine-specified code (in TCON, CRTC or TV Encoder code). In order to preserve bisectability, we also switch the backend and layer code in its own module. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2017-05-14drm/sun4i: Use lists to track registered display backends and TCONsChen-Yu Tsai
To support multiple display pipelines, we need to keep track of the multiple display backends and TCONs registered with the driver. Switch to lists to track registered components. Components are only appended to their respective lists if the bind process was successful. The TCON bind function now defers if a backend was not registered. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2017-03-07drm/sun4i: Drop primary layer pointer from sun4i_drvChen-Yu Tsai
The current layer init code keeps a pointer to the primary plane layer in sun4i_drv. When we eventually support multiple display pipelines, this would force us to keep track of primary planes for all crtcs. And these pointers only get used at bind time. Instead, have the crtc init code iterate through the returned layers to find the primary and cursor layers. And drop the pointer from the sun4i_drv structure. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2017-03-07drm/sun4i: Initialize crtc from tcon bind functionChen-Yu Tsai
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>
2017-03-07drm/sun4i: Move layers from sun4i_drv to sun4i_crtcChen-Yu Tsai
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>
2016-04-28drm: Add Allwinner A10 Display Engine supportMaxime Ripard
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>