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Commit c8b75bca authored by Eric Anholt's avatar Eric Anholt
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drm/vc4: Add KMS support for Raspberry Pi. 



This is enough for fbcon and bringing up X using
xf86-video-modesetting.  It doesn't support the 3D accelerator or
power management yet.

v2: Drop FB_HELPER select thanks to Archit's patches.  Do manual init
    ordering instead of using the .load hook.  Structure registration
    more like tegra's, but still using the typical "component" code.
    Drop no-op hooks for atomic_begin and mode_fixup() now that
    they're optional.  Drop sentinel in Makefile.  Fix minor style
    nits I noticed on another reread.

v3: Use the new bcm2835 clk driver to manage pixel/HSM clocks instead
    of having a fixed video mode.  Use exynos-style component driver
    matching instead of devicetree nodes to list the component driver
    instances.  Rename compatibility strings to say bcm2835, and
    distinguish pv0/1/2.  Clean up some h/vsync code, and add in
    interlaced mode setup.  Fix up probe/bind error paths.  Use
    bitops.h macros for vc4_regs.h

v4: Include i2c.h, allow building under COMPILE_TEST, drop msleep now
    that other bugs have been fixed, add timeouts to cpu_relax()
    loops, rename hpd-gpio to hpd-gpios.

Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 1f957324

drivers/gpu/drm/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -264,3 +264,5 @@ source "drivers/gpu/drm/sti/Kconfig" 
source "drivers/gpu/drm/amd/amdkfd/Kconfig"



source "drivers/gpu/drm/imx/Kconfig"



source "drivers/gpu/drm/vc4/Kconfig"

drivers/gpu/drm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ obj-$(CONFIG_DRM_MGA) += mga/ 
obj-$(CONFIG_DRM_I810)	+= i810/

obj-$(CONFIG_DRM_I915)  += i915/

obj-$(CONFIG_DRM_MGAG200) += mgag200/

obj-$(CONFIG_DRM_VC4)  += vc4/

obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus/

obj-$(CONFIG_DRM_SIS)   += sis/

obj-$(CONFIG_DRM_SAVAGE)+= savage/

drivers/gpu/drm/vc4/Kconfig

0 → 100644
+13 −0
Original line number Diff line number Diff line 
config DRM_VC4

	tristate "Broadcom VC4 Graphics"

	depends on ARCH_BCM2835 || COMPILE_TEST

	depends on DRM

	select DRM_KMS_HELPER

	select DRM_KMS_CMA_HELPER

	help

	  Choose this option if you have a system that has a Broadcom

	  VC4 GPU, such as the Raspberry Pi or other BCM2708/BCM2835.



	  This driver requires that "avoid_warnings=2" be present in

	  the config.txt for the firmware, to keep it from smashing

	  our display setup.

drivers/gpu/drm/vc4/Makefile

0 → 100644
+17 −0
Original line number Diff line number Diff line 
ccflags-y := -Iinclude/drm



# Please keep these build lists sorted!



# core driver code

vc4-y := \

	vc4_bo.o \

	vc4_crtc.o \

	vc4_drv.o \

	vc4_kms.o \

	vc4_hdmi.o \

	vc4_hvs.o \

	vc4_plane.o



vc4-$(CONFIG_DEBUG_FS) += vc4_debugfs.o



obj-$(CONFIG_DRM_VC4)  += vc4.o

drivers/gpu/drm/vc4/vc4_bo.c

0 → 100644
+52 −0
Original line number Diff line number Diff line 
/*

 *  Copyright © 2015 Broadcom

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



/* DOC: VC4 GEM BO management support.

 *

 * The VC4 GPU architecture (both scanout and rendering) has direct

 * access to system memory with no MMU in between.  To support it, we

 * use the GEM CMA helper functions to allocate contiguous ranges of

 * physical memory for our BOs.

 */



#include "vc4_drv.h"



struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t size)

{

	struct drm_gem_cma_object *cma_obj;



	cma_obj = drm_gem_cma_create(dev, size);

	if (IS_ERR(cma_obj))

		return NULL;

	else

		return to_vc4_bo(&cma_obj->base);

}



int vc4_dumb_create(struct drm_file *file_priv,

		    struct drm_device *dev,

		    struct drm_mode_create_dumb *args)

{

	int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);

	struct vc4_bo *bo = NULL;

	int ret;



	if (args->pitch < min_pitch)

		args->pitch = min_pitch;



	if (args->size < args->pitch * args->height)

		args->size = args->pitch * args->height;



	bo = vc4_bo_create(dev, roundup(args->size, PAGE_SIZE));

	if (!bo)

		return -ENOMEM;



	ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);

	drm_gem_object_unreference_unlocked(&bo->base.base);



	return ret;

}