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![Russell King](/assets/img/avatar_default.png)
This patch adds support for the pair of LCD controllers on the Marvell Armada 510 SoCs. This driver supports: - multiple contiguous scanout buffers for video and graphics - shm backed cacheable buffer objects for X pixmaps for Vivante GPU acceleration - dual lcd0 and lcd1 crt operation - video overlay on each LCD crt via DRM planes - page flipping of the main scanout buffers - DRM prime for buffer export/import This driver is trivial to extend to other Armada SoCs. Included in this commit is the core driver with no output support; output support is platform and encoder driver dependent. Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
170 lines
4.3 KiB
C
170 lines
4.3 KiB
C
/*
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* Copyright (C) 2012 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include "armada_drm.h"
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#include "armada_fb.h"
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#include "armada_gem.h"
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#include "armada_hw.h"
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static void armada_fb_destroy(struct drm_framebuffer *fb)
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{
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struct armada_framebuffer *dfb = drm_fb_to_armada_fb(fb);
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drm_framebuffer_cleanup(&dfb->fb);
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drm_gem_object_unreference_unlocked(&dfb->obj->obj);
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kfree(dfb);
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}
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static int armada_fb_create_handle(struct drm_framebuffer *fb,
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struct drm_file *dfile, unsigned int *handle)
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{
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struct armada_framebuffer *dfb = drm_fb_to_armada_fb(fb);
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return drm_gem_handle_create(dfile, &dfb->obj->obj, handle);
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}
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static const struct drm_framebuffer_funcs armada_fb_funcs = {
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.destroy = armada_fb_destroy,
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.create_handle = armada_fb_create_handle,
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};
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struct armada_framebuffer *armada_framebuffer_create(struct drm_device *dev,
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struct drm_mode_fb_cmd2 *mode, struct armada_gem_object *obj)
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{
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struct armada_framebuffer *dfb;
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uint8_t format, config;
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int ret;
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switch (mode->pixel_format) {
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#define FMT(drm, fmt, mod) \
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case DRM_FORMAT_##drm: \
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format = CFG_##fmt; \
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config = mod; \
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break
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FMT(RGB565, 565, CFG_SWAPRB);
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FMT(BGR565, 565, 0);
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FMT(ARGB1555, 1555, CFG_SWAPRB);
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FMT(ABGR1555, 1555, 0);
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FMT(RGB888, 888PACK, CFG_SWAPRB);
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FMT(BGR888, 888PACK, 0);
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FMT(XRGB8888, X888, CFG_SWAPRB);
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FMT(XBGR8888, X888, 0);
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FMT(ARGB8888, 8888, CFG_SWAPRB);
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FMT(ABGR8888, 8888, 0);
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FMT(YUYV, 422PACK, CFG_YUV2RGB | CFG_SWAPYU | CFG_SWAPUV);
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FMT(UYVY, 422PACK, CFG_YUV2RGB);
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FMT(VYUY, 422PACK, CFG_YUV2RGB | CFG_SWAPUV);
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FMT(YVYU, 422PACK, CFG_YUV2RGB | CFG_SWAPYU);
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FMT(YUV422, 422, CFG_YUV2RGB);
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FMT(YVU422, 422, CFG_YUV2RGB | CFG_SWAPUV);
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FMT(YUV420, 420, CFG_YUV2RGB);
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FMT(YVU420, 420, CFG_YUV2RGB | CFG_SWAPUV);
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FMT(C8, PSEUDO8, 0);
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#undef FMT
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default:
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return ERR_PTR(-EINVAL);
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}
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dfb = kzalloc(sizeof(*dfb), GFP_KERNEL);
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if (!dfb) {
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DRM_ERROR("failed to allocate Armada fb object\n");
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return ERR_PTR(-ENOMEM);
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}
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dfb->fmt = format;
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dfb->mod = config;
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dfb->obj = obj;
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drm_helper_mode_fill_fb_struct(&dfb->fb, mode);
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ret = drm_framebuffer_init(dev, &dfb->fb, &armada_fb_funcs);
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if (ret) {
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kfree(dfb);
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return ERR_PTR(ret);
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}
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/*
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* Take a reference on our object as we're successful - the
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* caller already holds a reference, which keeps us safe for
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* the above call, but the caller will drop their reference
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* to it. Hence we need to take our own reference.
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*/
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drm_gem_object_reference(&obj->obj);
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return dfb;
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}
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static struct drm_framebuffer *armada_fb_create(struct drm_device *dev,
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struct drm_file *dfile, struct drm_mode_fb_cmd2 *mode)
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{
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struct armada_gem_object *obj;
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struct armada_framebuffer *dfb;
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int ret;
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DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n",
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mode->width, mode->height, mode->pixel_format,
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mode->flags, mode->pitches[0], mode->pitches[1],
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mode->pitches[2]);
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/* We can only handle a single plane at the moment */
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if (drm_format_num_planes(mode->pixel_format) > 1 &&
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(mode->handles[0] != mode->handles[1] ||
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mode->handles[0] != mode->handles[2])) {
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ret = -EINVAL;
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goto err;
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}
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obj = armada_gem_object_lookup(dev, dfile, mode->handles[0]);
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if (!obj) {
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ret = -ENOENT;
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goto err;
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}
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if (obj->obj.import_attach && !obj->sgt) {
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ret = armada_gem_map_import(obj);
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if (ret)
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goto err_unref;
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}
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/* Framebuffer objects must have a valid device address for scanout */
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if (obj->dev_addr == DMA_ERROR_CODE) {
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ret = -EINVAL;
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goto err_unref;
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}
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dfb = armada_framebuffer_create(dev, mode, obj);
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if (IS_ERR(dfb)) {
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ret = PTR_ERR(dfb);
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goto err;
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}
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drm_gem_object_unreference_unlocked(&obj->obj);
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return &dfb->fb;
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err_unref:
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drm_gem_object_unreference_unlocked(&obj->obj);
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err:
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DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
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return ERR_PTR(ret);
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}
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static void armada_output_poll_changed(struct drm_device *dev)
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{
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struct armada_private *priv = dev->dev_private;
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struct drm_fb_helper *fbh = priv->fbdev;
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if (fbh)
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drm_fb_helper_hotplug_event(fbh);
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}
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const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
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.fb_create = armada_fb_create,
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.output_poll_changed = armada_output_poll_changed,
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};
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