diff options
Diffstat (limited to 'drivers/video/fbdev/msm/mdp.c')
| -rw-r--r-- | drivers/video/fbdev/msm/mdp.c | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/drivers/video/fbdev/msm/mdp.c b/drivers/video/fbdev/msm/mdp.c new file mode 100644 index 0000000..113c787 --- /dev/null +++ b/drivers/video/fbdev/msm/mdp.c @@ -0,0 +1,520 @@ +/* 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); 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