diff options
author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2011-09-19 09:40:31 (GMT) |
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committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2012-03-12 21:41:09 (GMT) |
commit | 2a618e0333f5d1d27bbd4d90d70f07e0a8dc0ba7 (patch) | |
tree | f7bfe21bf5374ec4997a3640b0411962b8b68b3a /drivers/video/sh_mobile_meram.c | |
parent | eb4f2304ba029f78516c2fe23213d7e2d0f8d58f (diff) | |
download | linux-2a618e0333f5d1d27bbd4d90d70f07e0a8dc0ba7.tar.xz |
fbdev: sh_mobile_meram: Add struct sh_mobile_meram_icb
The new structure stores ICB parameters for ICBs.
Instead of modifying the struct sh_mobile_meram_cfg instances passed by
callers, store the ICB parameters internally and make the public API
take const pointers to sh_mobile_meram_cfg.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers/video/sh_mobile_meram.c')
-rw-r--r-- | drivers/video/sh_mobile_meram.c | 178 |
1 files changed, 90 insertions, 88 deletions
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c index 7af2ffe..cddb180 100644 --- a/drivers/video/sh_mobile_meram.c +++ b/drivers/video/sh_mobile_meram.c @@ -100,14 +100,38 @@ static unsigned long icb_regs[] = { }; #define ICB_REGS_SIZE ARRAY_SIZE(icb_regs) +/* + * sh_mobile_meram_icb - MERAM ICB information + * @regs: Registers cache + * @region: Start and end addresses of the MERAM region + * @cache_unit: Bytes to cache per ICB + * @pixelformat: Video pixel format of the data stored in the ICB + * @current_reg: Which of Start Address Register A (0) or B (1) is in use + */ +struct sh_mobile_meram_icb { + unsigned long regs[ICB_REGS_SIZE]; + + unsigned long region; + unsigned int cache_unit; + unsigned int pixelformat; + unsigned int current_reg; +}; + +/* + * sh_mobile_meram_priv - MERAM device + * @base: Registers base address + * @regs: Registers cache + * @lock: Protects used_icb and icbs + * @used_icb: Bitmask of used ICBs + * @icbs: ICBs + */ struct sh_mobile_meram_priv { - void __iomem *base; - struct mutex lock; - unsigned long used_icb; - unsigned int used_meram_cache_regions; - unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM]; - unsigned long cmn_saved_regs[CMN_REGS_SIZE]; - unsigned long icb_saved_regs[ICB_REGS_SIZE * SH_MOBILE_MERAM_ICB_NUM]; + void __iomem *base; + unsigned long regs[CMN_REGS_SIZE]; + + struct mutex lock; + unsigned long used_icb; + struct sh_mobile_meram_icb icbs[SH_MOBILE_MERAM_ICB_NUM]; }; /* settings */ @@ -157,7 +181,7 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off) */ static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb_cfg *new) + const struct sh_mobile_meram_icb_cfg *new) { unsigned int used_start, used_end, meram_start, meram_end; unsigned int i; @@ -167,17 +191,20 @@ static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, return 1; if (test_bit(new->marker_icb, &priv->used_icb) || - test_bit(new->cache_icb, &priv->used_icb)) + test_bit(new->cache_icb, &priv->used_icb)) return 1; - for (i = 0; i < priv->used_meram_cache_regions; i++) { - used_start = MERAM_CACHE_START(priv->used_meram_cache[i]); - used_end = MERAM_CACHE_END(priv->used_meram_cache[i]); + for (i = 0; i < SH_MOBILE_MERAM_ICB_NUM; i++) { + if (!test_bit(i, &priv->used_icb)) + continue; + + used_start = MERAM_CACHE_START(priv->icbs[i].region); + used_end = MERAM_CACHE_END(priv->icbs[i].region); meram_start = new->meram_offset; meram_end = new->meram_offset + new->meram_size; if ((meram_start >= used_start && meram_start < used_end) || - (meram_end > used_start && meram_end < used_end)) + (meram_end > used_start && meram_end < used_end)) return 1; } @@ -189,22 +216,18 @@ static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, */ static inline void meram_mark(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb_cfg *new) + const struct sh_mobile_meram_icb_cfg *new, + int pixelformat) { - unsigned int n; - - if (new->marker_icb < 0 || new->cache_icb < 0) - return; - __set_bit(new->marker_icb, &priv->used_icb); __set_bit(new->cache_icb, &priv->used_icb); - n = priv->used_meram_cache_regions; - - priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset, - new->meram_size); - - priv->used_meram_cache_regions++; + priv->icbs[new->marker_icb].region = MERAM_CACHE_SET(new->meram_offset, + new->meram_size); + priv->icbs[new->cache_icb].region = MERAM_CACHE_SET(new->meram_offset, + new->meram_size); + priv->icbs[new->marker_icb].current_reg = 1; + priv->icbs[new->marker_icb].pixelformat = pixelformat; } /* @@ -212,30 +235,10 @@ static inline void meram_mark(struct sh_mobile_meram_priv *priv, */ static inline void meram_unmark(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb_cfg *icb) + const struct sh_mobile_meram_icb_cfg *icb) { - unsigned long pattern; - unsigned int i; - - if (icb->marker_icb < 0 || icb->cache_icb < 0) - return; - __clear_bit(icb->marker_icb, &priv->used_icb); __clear_bit(icb->cache_icb, &priv->used_icb); - - pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size); - for (i = 0; i < priv->used_meram_cache_regions; i++) { - if (priv->used_meram_cache[i] == pattern) { - while (i < priv->used_meram_cache_regions - 1) { - priv->used_meram_cache[i] = - priv->used_meram_cache[i + 1] ; - i++; - } - priv->used_meram_cache[i] = 0; - priv->used_meram_cache_regions--; - break; - } - } } /* @@ -244,7 +247,7 @@ static inline void meram_unmark(struct sh_mobile_meram_priv *priv, static inline int is_nvcolor(int cspace) { if (cspace == SH_MOBILE_MERAM_PF_NV || - cspace == SH_MOBILE_MERAM_PF_NV24) + cspace == SH_MOBILE_MERAM_PF_NV24) return 1; return 0; } @@ -253,46 +256,51 @@ static inline int is_nvcolor(int cspace) * set the next address to fetch */ static inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_cfg *cfg, + const struct sh_mobile_meram_cfg *cfg, unsigned long base_addr_y, unsigned long base_addr_c) { + struct sh_mobile_meram_icb *icb = &priv->icbs[cfg->icb[0].marker_icb]; unsigned long target; - cfg->current_reg ^= 1; - target = cfg->current_reg ? MExxSARB : MExxSARA; + icb->current_reg ^= 1; + target = icb->current_reg ? MExxSARB : MExxSARA; /* set the next address to fetch */ - meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, + meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, base_addr_y); meram_write_icb(priv->base, cfg->icb[0].marker_icb, target, - base_addr_y + cfg->icb[0].cache_unit); + base_addr_y + + priv->icbs[cfg->icb[0].marker_icb].cache_unit); - if (is_nvcolor(cfg->pixelformat)) { + if (is_nvcolor(icb->pixelformat)) { meram_write_icb(priv->base, cfg->icb[1].cache_icb, target, base_addr_c); meram_write_icb(priv->base, cfg->icb[1].marker_icb, target, - base_addr_c + cfg->icb[1].cache_unit); + base_addr_c + + priv->icbs[cfg->icb[1].marker_icb].cache_unit); } } /* * get the next ICB address */ -static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg, - unsigned long *icb_addr_y, - unsigned long *icb_addr_c) +static inline void +meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, + const struct sh_mobile_meram_cfg *cfg, + unsigned long *icb_addr_y, unsigned long *icb_addr_c) { + struct sh_mobile_meram_priv *priv = pdata->priv; + struct sh_mobile_meram_icb *icb = &priv->icbs[cfg->icb[0].marker_icb]; unsigned long icb_offset; if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0) - icb_offset = 0x80000000 | (cfg->current_reg << 29); + icb_offset = 0x80000000 | (icb->current_reg << 29); else - icb_offset = 0xc0000000 | (cfg->current_reg << 23); + icb_offset = 0xc0000000 | (icb->current_reg << 23); *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24); - if (is_nvcolor(cfg->pixelformat)) + if (is_nvcolor(icb->pixelformat)) *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24); } @@ -304,7 +312,7 @@ static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, */ static int meram_init(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb_cfg *icb, + const struct sh_mobile_meram_icb_cfg *icb, unsigned int xres, unsigned int yres, unsigned int *out_pitch) { @@ -352,7 +360,8 @@ static int meram_init(struct sh_mobile_meram_priv *priv, meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch); /* save a cache unit size */ - icb->cache_unit = xres * save_lines; + priv->icbs[icb->cache_icb].cache_unit = xres * save_lines; + priv->icbs[icb->marker_icb].cache_unit = xres * save_lines; /* * Set MERAM for framebuffer @@ -374,14 +383,16 @@ static int meram_init(struct sh_mobile_meram_priv *priv, } static void meram_deinit(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb_cfg *icb) + const struct sh_mobile_meram_icb_cfg *icb) { /* disable ICB */ meram_write_icb(priv->base, icb->cache_icb, MExxCTL, MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); meram_write_icb(priv->base, icb->marker_icb, MExxCTL, MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); - icb->cache_unit = 0; + + priv->icbs[icb->cache_icb].cache_unit = 0; + priv->icbs[icb->marker_icb].cache_unit = 0; } /* @@ -389,7 +400,7 @@ static void meram_deinit(struct sh_mobile_meram_priv *priv, */ static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg, + const struct sh_mobile_meram_cfg *cfg, unsigned int xres, unsigned int yres, unsigned int pixelformat, unsigned long base_addr_y, @@ -433,12 +444,6 @@ static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, mutex_lock(&priv->lock); - if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) { - dev_err(&pdev->dev, "no more ICB available."); - error = -EINVAL; - goto err; - } - /* make sure that there's no overlaps */ if (meram_check_overlap(priv, &cfg->icb[0])) { dev_err(&pdev->dev, "conflicting config detected."); @@ -464,10 +469,9 @@ static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, } /* we now register the ICB */ - cfg->pixelformat = pixelformat; - meram_mark(priv, &cfg->icb[0]); + meram_mark(priv, &cfg->icb[0], pixelformat); if (is_nvcolor(pixelformat)) - meram_mark(priv, &cfg->icb[1]); + meram_mark(priv, &cfg->icb[1], pixelformat); /* initialize MERAM */ meram_init(priv, &cfg->icb[0], xres, yres, &out_pitch); @@ -479,7 +483,6 @@ static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, meram_init(priv, &cfg->icb[1], 2 * xres, (yres + 1) / 2, &out_pitch); - cfg->current_reg = 1; meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c); meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c); @@ -492,19 +495,21 @@ err: } static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg) + const struct sh_mobile_meram_cfg *cfg) { struct sh_mobile_meram_priv *priv; + struct sh_mobile_meram_icb *icb; if (!pdata || !pdata->priv || !cfg) return -EINVAL; priv = pdata->priv; + icb = &priv->icbs[cfg->icb[0].marker_icb]; mutex_lock(&priv->lock); /* deinit & unmark */ - if (is_nvcolor(cfg->pixelformat)) { + if (is_nvcolor(icb->pixelformat)) { meram_deinit(priv, &cfg->icb[1]); meram_unmark(priv, &cfg->icb[1]); } @@ -517,7 +522,7 @@ static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, } static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg, + const struct sh_mobile_meram_cfg *cfg, unsigned long base_addr_y, unsigned long base_addr_c, unsigned long *icb_addr_y, @@ -547,18 +552,17 @@ static int sh_mobile_meram_runtime_suspend(struct device *dev) unsigned int i, j; for (i = 0; i < CMN_REGS_SIZE; i++) - priv->cmn_saved_regs[i] = meram_read_reg(priv->base, - common_regs[i]); + priv->regs[i] = meram_read_reg(priv->base, common_regs[i]); for (i = 0; i < 32; i++) { if (!test_bit(i, &priv->used_icb)) continue; for (j = 0; j < ICB_REGS_SIZE; j++) { - priv->icb_saved_regs[i * ICB_REGS_SIZE + j] = + priv->icbs[i].regs[j] = meram_read_icb(priv->base, i, icb_regs[j]); /* Reset ICB on resume */ if (icb_regs[j] == MExxCTL) - priv->icb_saved_regs[i * ICB_REGS_SIZE + j] |= + priv->icbs[i].regs[j] |= MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF; } } @@ -574,15 +578,13 @@ static int sh_mobile_meram_runtime_resume(struct device *dev) for (i = 0; i < 32; i++) { if (!test_bit(i, &priv->used_icb)) continue; - for (j = 0; j < ICB_REGS_SIZE; j++) { + for (j = 0; j < ICB_REGS_SIZE; j++) meram_write_icb(priv->base, i, icb_regs[j], - priv->icb_saved_regs[i * ICB_REGS_SIZE + j]); - } + priv->icbs[i].regs[j]); } for (i = 0; i < CMN_REGS_SIZE; i++) - meram_write_reg(priv->base, common_regs[i], - priv->cmn_saved_regs[i]); + meram_write_reg(priv->base, common_regs[i], priv->regs[i]); return 0; } |