+++ /dev/null
-/* drivers/video/msm_fb/mdp.c
- *
- * MSM MDP Interface (used by framebuffer core)
- *
- * Copyright (C) 2007 QUALCOMM Incorporated
- * Copyright (C) 2007 Google Incorporated
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/fb.h>
-#include <linux/msm_mdp.h>
-#include <linux/interrupt.h>
-#include <linux/wait.h>
-#include <linux/clk.h>
-#include <linux/file.h>
-#include <linux/major.h>
-#include <linux/slab.h>
-
-#include <linux/platform_data/video-msm_fb.h>
-#include <linux/platform_device.h>
-#include <linux/export.h>
-
-#include "mdp_hw.h"
-
-struct class *mdp_class;
-
-#define MDP_CMD_DEBUG_ACCESS_BASE (0x10000)
-
-static uint16_t mdp_default_ccs[] = {
- 0x254, 0x000, 0x331, 0x254, 0xF38, 0xE61, 0x254, 0x409, 0x000,
- 0x010, 0x080, 0x080
-};
-
-static DECLARE_WAIT_QUEUE_HEAD(mdp_dma2_waitqueue);
-static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
-static struct msmfb_callback *dma_callback;
-static struct clk *clk;
-static unsigned int mdp_irq_mask;
-static DEFINE_SPINLOCK(mdp_lock);
-DEFINE_MUTEX(mdp_mutex);
-
-static int enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
-{
- unsigned long irq_flags;
- int ret = 0;
-
- BUG_ON(!mask);
-
- spin_lock_irqsave(&mdp_lock, irq_flags);
- /* if the mask bits are already set return an error, this interrupt
- * is already enabled */
- if (mdp_irq_mask & mask) {
- printk(KERN_ERR "mdp irq already on already on %x %x\n",
- mdp_irq_mask, mask);
- ret = -1;
- }
- /* if the mdp irq is not already enabled enable it */
- if (!mdp_irq_mask) {
- if (clk)
- clk_enable(clk);
- enable_irq(mdp->irq);
- }
-
- /* update the irq mask to reflect the fact that the interrupt is
- * enabled */
- mdp_irq_mask |= mask;
- spin_unlock_irqrestore(&mdp_lock, irq_flags);
- return ret;
-}
-
-static int locked_disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
-{
- /* this interrupt is already disabled! */
- if (!(mdp_irq_mask & mask)) {
- printk(KERN_ERR "mdp irq already off %x %x\n",
- mdp_irq_mask, mask);
- return -1;
- }
- /* update the irq mask to reflect the fact that the interrupt is
- * disabled */
- mdp_irq_mask &= ~(mask);
- /* if no one is waiting on the interrupt, disable it */
- if (!mdp_irq_mask) {
- disable_irq_nosync(mdp->irq);
- if (clk)
- clk_disable(clk);
- }
- return 0;
-}
-
-static int disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
-{
- unsigned long irq_flags;
- int ret;
-
- spin_lock_irqsave(&mdp_lock, irq_flags);
- ret = locked_disable_mdp_irq(mdp, mask);
- spin_unlock_irqrestore(&mdp_lock, irq_flags);
- return ret;
-}
-
-static irqreturn_t mdp_isr(int irq, void *data)
-{
- uint32_t status;
- unsigned long irq_flags;
- struct mdp_info *mdp = data;
-
- spin_lock_irqsave(&mdp_lock, irq_flags);
-
- status = mdp_readl(mdp, MDP_INTR_STATUS);
- mdp_writel(mdp, status, MDP_INTR_CLEAR);
-
- status &= mdp_irq_mask;
- if (status & DL0_DMA2_TERM_DONE) {
- if (dma_callback) {
- dma_callback->func(dma_callback);
- dma_callback = NULL;
- }
- wake_up(&mdp_dma2_waitqueue);
- }
-
- if (status & DL0_ROI_DONE)
- wake_up(&mdp_ppp_waitqueue);
-
- if (status)
- locked_disable_mdp_irq(mdp, status);
-
- spin_unlock_irqrestore(&mdp_lock, irq_flags);
- return IRQ_HANDLED;
-}
-
-static uint32_t mdp_check_mask(uint32_t mask)
-{
- uint32_t ret;
- unsigned long irq_flags;
-
- spin_lock_irqsave(&mdp_lock, irq_flags);
- ret = mdp_irq_mask & mask;
- spin_unlock_irqrestore(&mdp_lock, irq_flags);
- return ret;
-}
-
-static int mdp_wait(struct mdp_info *mdp, uint32_t mask, wait_queue_head_t *wq)
-{
- int ret = 0;
- unsigned long irq_flags;
-
- wait_event_timeout(*wq, !mdp_check_mask(mask), HZ);
-
- spin_lock_irqsave(&mdp_lock, irq_flags);
- if (mdp_irq_mask & mask) {
- locked_disable_mdp_irq(mdp, mask);
- printk(KERN_WARNING "timeout waiting for mdp to complete %x\n",
- mask);
- ret = -ETIMEDOUT;
- }
- spin_unlock_irqrestore(&mdp_lock, irq_flags);
-
- return ret;
-}
-
-void mdp_dma_wait(struct mdp_device *mdp_dev)
-{
-#define MDP_MAX_TIMEOUTS 20
- static int timeout_count;
- struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
-
- if (mdp_wait(mdp, DL0_DMA2_TERM_DONE, &mdp_dma2_waitqueue) == -ETIMEDOUT)
- timeout_count++;
- else
- timeout_count = 0;
-
- if (timeout_count > MDP_MAX_TIMEOUTS) {
- printk(KERN_ERR "mdp: dma failed %d times, somethings wrong!\n",
- MDP_MAX_TIMEOUTS);
- BUG();
- }
-}
-
-static int mdp_ppp_wait(struct mdp_info *mdp)
-{
- return mdp_wait(mdp, DL0_ROI_DONE, &mdp_ppp_waitqueue);
-}
-
-void mdp_dma_to_mddi(struct mdp_info *mdp, uint32_t addr, uint32_t stride,
- uint32_t width, uint32_t height, uint32_t x, uint32_t y,
- struct msmfb_callback *callback)
-{
- uint32_t dma2_cfg;
- uint16_t ld_param = 0; /* 0=PRIM, 1=SECD, 2=EXT */
-
- if (enable_mdp_irq(mdp, DL0_DMA2_TERM_DONE)) {
- printk(KERN_ERR "mdp_dma_to_mddi: busy\n");
- return;
- }
-
- dma_callback = callback;
-
- dma2_cfg = DMA_PACK_TIGHT |
- DMA_PACK_ALIGN_LSB |
- DMA_PACK_PATTERN_RGB |
- DMA_OUT_SEL_AHB |
- DMA_IBUF_NONCONTIGUOUS;
-
- dma2_cfg |= DMA_IBUF_FORMAT_RGB565;
-
- dma2_cfg |= DMA_OUT_SEL_MDDI;
-
- dma2_cfg |= DMA_MDDI_DMAOUT_LCD_SEL_PRIMARY;
-
- dma2_cfg |= DMA_DITHER_EN;
-
- /* setup size, address, and stride */
- mdp_writel(mdp, (height << 16) | (width),
- MDP_CMD_DEBUG_ACCESS_BASE + 0x0184);
- mdp_writel(mdp, addr, MDP_CMD_DEBUG_ACCESS_BASE + 0x0188);
- mdp_writel(mdp, stride, MDP_CMD_DEBUG_ACCESS_BASE + 0x018C);
-
- /* 666 18BPP */
- dma2_cfg |= DMA_DSTC0G_6BITS | DMA_DSTC1B_6BITS | DMA_DSTC2R_6BITS;
-
- /* set y & x offset and MDDI transaction parameters */
- mdp_writel(mdp, (y << 16) | (x), MDP_CMD_DEBUG_ACCESS_BASE + 0x0194);
- mdp_writel(mdp, ld_param, MDP_CMD_DEBUG_ACCESS_BASE + 0x01a0);
- mdp_writel(mdp, (MDDI_VDO_PACKET_DESC << 16) | MDDI_VDO_PACKET_PRIM,
- MDP_CMD_DEBUG_ACCESS_BASE + 0x01a4);
-
- mdp_writel(mdp, dma2_cfg, MDP_CMD_DEBUG_ACCESS_BASE + 0x0180);
-
- /* start DMA2 */
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0044);
-}
-
-void mdp_dma(struct mdp_device *mdp_dev, uint32_t addr, uint32_t stride,
- uint32_t width, uint32_t height, uint32_t x, uint32_t y,
- struct msmfb_callback *callback, int interface)
-{
- struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
-
- if (interface == MSM_MDDI_PMDH_INTERFACE) {
- mdp_dma_to_mddi(mdp, addr, stride, width, height, x, y,
- callback);
- }
-}
-
-int get_img(struct mdp_img *img, struct fb_info *info,
- unsigned long *start, unsigned long *len,
- struct file **filep)
-{
- int ret = 0;
- struct fd f = fdget(img->memory_id);
- if (f.file == NULL)
- return -1;
-
- if (MAJOR(file_inode(f.file)->i_rdev) == FB_MAJOR) {
- *start = info->fix.smem_start;
- *len = info->fix.smem_len;
- } else
- ret = -1;
- fdput(f);
-
- return ret;
-}
-
-void put_img(struct file *src_file, struct file *dst_file)
-{
-}
-
-int mdp_blit(struct mdp_device *mdp_dev, struct fb_info *fb,
- struct mdp_blit_req *req)
-{
- int ret;
- unsigned long src_start = 0, src_len = 0, dst_start = 0, dst_len = 0;
- struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
- struct file *src_file = 0, *dst_file = 0;
-
- /* WORKAROUND FOR HARDWARE BUG IN BG TILE FETCH */
- if (unlikely(req->src_rect.h == 0 ||
- req->src_rect.w == 0)) {
- printk(KERN_ERR "mpd_ppp: src img of zero size!\n");
- return -EINVAL;
- }
- if (unlikely(req->dst_rect.h == 0 ||
- req->dst_rect.w == 0))
- return -EINVAL;
-
- /* do this first so that if this fails, the caller can always
- * safely call put_img */
- if (unlikely(get_img(&req->src, fb, &src_start, &src_len, &src_file))) {
- printk(KERN_ERR "mpd_ppp: could not retrieve src image from "
- "memory\n");
- return -EINVAL;
- }
-
- if (unlikely(get_img(&req->dst, fb, &dst_start, &dst_len, &dst_file))) {
- printk(KERN_ERR "mpd_ppp: could not retrieve dst image from "
- "memory\n");
- return -EINVAL;
- }
- mutex_lock(&mdp_mutex);
-
- /* transp_masking unimplemented */
- req->transp_mask = MDP_TRANSP_NOP;
- if (unlikely((req->transp_mask != MDP_TRANSP_NOP ||
- req->alpha != MDP_ALPHA_NOP ||
- HAS_ALPHA(req->src.format)) &&
- (req->flags & MDP_ROT_90 &&
- req->dst_rect.w <= 16 && req->dst_rect.h >= 16))) {
- int i;
- unsigned int tiles = req->dst_rect.h / 16;
- unsigned int remainder = req->dst_rect.h % 16;
- req->src_rect.w = 16*req->src_rect.w / req->dst_rect.h;
- req->dst_rect.h = 16;
- for (i = 0; i < tiles; i++) {
- enable_mdp_irq(mdp, DL0_ROI_DONE);
- ret = mdp_ppp_blit(mdp, req, src_file, src_start,
- src_len, dst_file, dst_start,
- dst_len);
- if (ret)
- goto err_bad_blit;
- ret = mdp_ppp_wait(mdp);
- if (ret)
- goto err_wait_failed;
- req->dst_rect.y += 16;
- req->src_rect.x += req->src_rect.w;
- }
- if (!remainder)
- goto end;
- req->src_rect.w = remainder*req->src_rect.w / req->dst_rect.h;
- req->dst_rect.h = remainder;
- }
- enable_mdp_irq(mdp, DL0_ROI_DONE);
- ret = mdp_ppp_blit(mdp, req, src_file, src_start, src_len, dst_file,
- dst_start,
- dst_len);
- if (ret)
- goto err_bad_blit;
- ret = mdp_ppp_wait(mdp);
- if (ret)
- goto err_wait_failed;
-end:
- put_img(src_file, dst_file);
- mutex_unlock(&mdp_mutex);
- return 0;
-err_bad_blit:
- disable_mdp_irq(mdp, DL0_ROI_DONE);
-err_wait_failed:
- put_img(src_file, dst_file);
- mutex_unlock(&mdp_mutex);
- return ret;
-}
-
-void mdp_set_grp_disp(struct mdp_device *mdp_dev, unsigned disp_id)
-{
- struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
-
- disp_id &= 0xf;
- mdp_writel(mdp, disp_id, MDP_FULL_BYPASS_WORD43);
-}
-
-int register_mdp_client(struct class_interface *cint)
-{
- if (!mdp_class) {
- pr_err("mdp: no mdp_class when registering mdp client\n");
- return -ENODEV;
- }
- cint->class = mdp_class;
- return class_interface_register(cint);
-}
-
-#include "mdp_csc_table.h"
-#include "mdp_scale_tables.h"
-
-int mdp_probe(struct platform_device *pdev)
-{
- struct resource *resource;
- int ret;
- int n;
- struct mdp_info *mdp;
-
- resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!resource) {
- pr_err("mdp: can not get mdp mem resource!\n");
- return -ENOMEM;
- }
-
- mdp = kzalloc(sizeof(struct mdp_info), GFP_KERNEL);
- if (!mdp)
- return -ENOMEM;
-
- mdp->irq = platform_get_irq(pdev, 0);
- if (mdp->irq < 0) {
- pr_err("mdp: can not get mdp irq\n");
- ret = mdp->irq;
- goto error_get_irq;
- }
-
- mdp->base = ioremap(resource->start, resource_size(resource));
- if (mdp->base == 0) {
- printk(KERN_ERR "msmfb: cannot allocate mdp regs!\n");
- ret = -ENOMEM;
- goto error_ioremap;
- }
-
- mdp->mdp_dev.dma = mdp_dma;
- mdp->mdp_dev.dma_wait = mdp_dma_wait;
- mdp->mdp_dev.blit = mdp_blit;
- mdp->mdp_dev.set_grp_disp = mdp_set_grp_disp;
-
- clk = clk_get(&pdev->dev, "mdp_clk");
- if (IS_ERR(clk)) {
- printk(KERN_INFO "mdp: failed to get mdp clk");
- ret = PTR_ERR(clk);
- goto error_get_clk;
- }
-
- ret = request_irq(mdp->irq, mdp_isr, 0, "msm_mdp", mdp);
- if (ret)
- goto error_request_irq;
- disable_irq(mdp->irq);
- mdp_irq_mask = 0;
-
- /* debug interface write access */
- mdp_writel(mdp, 1, 0x60);
-
- mdp_writel(mdp, MDP_ANY_INTR_MASK, MDP_INTR_ENABLE);
- mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE);
-
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc);
-
- for (n = 0; n < ARRAY_SIZE(csc_table); n++)
- mdp_writel(mdp, csc_table[n].val, csc_table[n].reg);
-
- /* clear up unused fg/main registers */
- /* comp.plane 2&3 ystride */
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0120);
-
- /* unpacked pattern */
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x012c);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0130);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0134);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0158);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x015c);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0160);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0170);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0174);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x017c);
-
- /* comp.plane 2 & 3 */
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0114);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0118);
-
- /* clear unused bg registers */
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01c8);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01d0);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01dc);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e0);
- mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e4);
-
- for (n = 0; n < ARRAY_SIZE(mdp_upscale_table); n++)
- mdp_writel(mdp, mdp_upscale_table[n].val,
- mdp_upscale_table[n].reg);
-
- for (n = 0; n < 9; n++)
- mdp_writel(mdp, mdp_default_ccs[n], 0x40440 + 4 * n);
- mdp_writel(mdp, mdp_default_ccs[9], 0x40500 + 4 * 0);
- mdp_writel(mdp, mdp_default_ccs[10], 0x40500 + 4 * 0);
- mdp_writel(mdp, mdp_default_ccs[11], 0x40500 + 4 * 0);
-
- /* register mdp device */
- mdp->mdp_dev.dev.parent = &pdev->dev;
- mdp->mdp_dev.dev.class = mdp_class;
- dev_set_name(&mdp->mdp_dev.dev, "mdp%d", pdev->id);
-
- /* if you can remove the platform device you'd have to implement
- * this:
- mdp_dev.release = mdp_class; */
-
- ret = device_register(&mdp->mdp_dev.dev);
- if (ret)
- goto error_device_register;
- return 0;
-
-error_device_register:
- free_irq(mdp->irq, mdp);
-error_request_irq:
-error_get_clk:
- iounmap(mdp->base);
-error_get_irq:
-error_ioremap:
- kfree(mdp);
- return ret;
-}
-
-static struct platform_driver msm_mdp_driver = {
- .probe = mdp_probe,
- .driver = {.name = "msm_mdp"},
-};
-
-static int __init mdp_init(void)
-{
- mdp_class = class_create(THIS_MODULE, "msm_mdp");
- if (IS_ERR(mdp_class)) {
- printk(KERN_ERR "Error creating mdp class\n");
- return PTR_ERR(mdp_class);
- }
- return platform_driver_register(&msm_mdp_driver);
-}
-
-subsys_initcall(mdp_init);
Code Review / kvmfornfv.git / blobdiff