From c8b75bca92cbf064b9fa125fc74a85994452e935 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 2 Mar 2015 13:01:12 -0800 Subject: 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: Eric Anholt Acked-by: Daniel Vetter --- drivers/gpu/drm/vc4/vc4_bo.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 drivers/gpu/drm/vc4/vc4_bo.c (limited to 'drivers/gpu/drm/vc4/vc4_bo.c') diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c new file mode 100644 index 0000000..ab9f510 --- /dev/null +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -0,0 +1,52 @@ +/* + * 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; +} -- cgit v1.1