DRM: Armada: Add Armada DRM driver
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>
This commit is contained in:
Russell King
183
drivers/gpu/drm/armada/armada_debugfs.c
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183
drivers/gpu/drm/armada/armada_debugfs.c
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/*
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* Copyright (C) 2012 Russell King
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* Rewritten from the dovefb driver, and Armada510 manuals.
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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 <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <drm/drmP.h>
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#include "armada_crtc.h"
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#include "armada_drm.h"
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static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
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{
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struct drm_info_node *node = m->private;
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struct drm_device *dev = node->minor->dev;
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struct armada_private *priv = dev->dev_private;
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int ret;
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mutex_lock(&dev->struct_mutex);
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ret = drm_mm_dump_table(m, &priv->linear);
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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static int armada_debugfs_reg_show(struct seq_file *m, void *data)
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{
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struct drm_device *dev = m->private;
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struct armada_private *priv = dev->dev_private;
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int n, i;
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if (priv) {
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for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
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struct armada_crtc *dcrtc = priv->dcrtc[n];
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if (!dcrtc)
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continue;
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for (i = 0x84; i <= 0x1c4; i += 4) {
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uint32_t v = readl_relaxed(dcrtc->base + i);
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seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v);
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}
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}
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}
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return 0;
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}
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static int armada_debugfs_reg_r_open(struct inode *inode, struct file *file)
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{
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return single_open(file, armada_debugfs_reg_show, inode->i_private);
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}
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static const struct file_operations fops_reg_r = {
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.owner = THIS_MODULE,
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.open = armada_debugfs_reg_r_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int armada_debugfs_write(struct file *file, const char __user *ptr,
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size_t len, loff_t *off)
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{
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struct drm_device *dev = file->private_data;
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struct armada_private *priv = dev->dev_private;
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struct armada_crtc *dcrtc = priv->dcrtc[0];
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char buf[32], *p;
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uint32_t reg, val;
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int ret;
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if (*off != 0)
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return 0;
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if (len > sizeof(buf) - 1)
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len = sizeof(buf) - 1;
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ret = strncpy_from_user(buf, ptr, len);
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if (ret < 0)
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return ret;
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buf[len] = '\0';
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reg = simple_strtoul(buf, &p, 16);
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if (!isspace(*p))
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return -EINVAL;
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val = simple_strtoul(p + 1, NULL, 16);
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if (reg >= 0x84 && reg <= 0x1c4)
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writel(val, dcrtc->base + reg);
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return len;
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}
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static int armada_debugfs_reg_w_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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static const struct file_operations fops_reg_w = {
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.owner = THIS_MODULE,
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.open = armada_debugfs_reg_w_open,
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.write = armada_debugfs_write,
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.llseek = noop_llseek,
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};
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static struct drm_info_list armada_debugfs_list[] = {
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{ "gem_linear", armada_debugfs_gem_linear_show, 0 },
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};
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#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
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static int drm_add_fake_info_node(struct drm_minor *minor, struct dentry *ent,
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const void *key)
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{
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struct drm_info_node *node;
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node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
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if (node == NULL) {
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debugfs_remove(ent);
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return -ENOMEM;
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}
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node->minor = minor;
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node->dent = ent;
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node->info_ent = (void *) key;
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mutex_lock(&minor->debugfs_lock);
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list_add(&node->list, &minor->debugfs_list);
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mutex_unlock(&minor->debugfs_lock);
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return 0;
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}
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static int armada_debugfs_create(struct dentry *root, struct drm_minor *minor,
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const char *name, umode_t mode, const struct file_operations *fops)
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{
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struct dentry *de;
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de = debugfs_create_file(name, mode, root, minor->dev, fops);
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return drm_add_fake_info_node(minor, de, fops);
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}
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int armada_drm_debugfs_init(struct drm_minor *minor)
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{
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int ret;
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ret = drm_debugfs_create_files(armada_debugfs_list,
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ARMADA_DEBUGFS_ENTRIES,
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minor->debugfs_root, minor);
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if (ret)
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return ret;
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ret = armada_debugfs_create(minor->debugfs_root, minor,
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"reg", S_IFREG | S_IRUSR, &fops_reg_r);
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if (ret)
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goto err_1;
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ret = armada_debugfs_create(minor->debugfs_root, minor,
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"reg_wr", S_IFREG | S_IWUSR, &fops_reg_w);
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if (ret)
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goto err_2;
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return ret;
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err_2:
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drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
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err_1:
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drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
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minor);
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return ret;
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}
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void armada_drm_debugfs_cleanup(struct drm_minor *minor)
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{
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drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_w, 1, minor);
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drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
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drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
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minor);
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}
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