diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/i2c/ccs-pll.c | 148 | ||||
| -rw-r--r-- | drivers/media/i2c/ccs-pll.h | 4 |
2 files changed, 95 insertions, 57 deletions
diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c index 43735f6d0bb2..a6443589b948 100644 --- a/drivers/media/i2c/ccs-pll.c +++ b/drivers/media/i2c/ccs-pll.c @@ -46,12 +46,14 @@ static inline uint32_t one_or_more(uint32_t a) } static int bounds_check(struct device *dev, uint32_t val, - uint32_t min, uint32_t max, char *str) + uint32_t min, uint32_t max, const char *prefix, + char *str) { if (val >= min && val <= max) return 0; - dev_dbg(dev, "%s out of bounds: %d (%d--%d)\n", str, val, min, max); + dev_dbg(dev, "%s_%s out of bounds: %d (%d--%d)\n", prefix, + str, val, min, max); return -EINVAL; } @@ -81,7 +83,7 @@ static void print_pll(struct device *dev, struct ccs_pll *pll) unsigned int which; } branches[] = { { &pll->vt_fr, &pll->vt_bk, PLL_VT }, - { NULL, &pll->op_bk, PLL_OP } + { &pll->op_fr, &pll->op_bk, PLL_OP } }, *br; unsigned int i; @@ -127,68 +129,90 @@ static void print_pll(struct device *dev, struct ccs_pll *pll) pll->flags & PLL_FL(FIFO_OVERRATING) ? " fifo-overrating" : ""); } -static int check_all_bounds(struct device *dev, - const struct ccs_pll_limits *lim, - const struct ccs_pll_branch_limits_fr *op_lim_fr, - const struct ccs_pll_branch_limits_bk *op_lim_bk, - struct ccs_pll *pll, - struct ccs_pll_branch_fr *op_pll_fr, - struct ccs_pll_branch_bk *op_pll_bk) +static int check_fr_bounds(struct device *dev, + const struct ccs_pll_limits *lim, + struct ccs_pll *pll, unsigned int which) { + const struct ccs_pll_branch_limits_fr *lim_fr; + struct ccs_pll_branch_fr *pll_fr; + const char *s = pll_string(which); int rval; - rval = bounds_check(dev, op_pll_fr->pll_ip_clk_freq_hz, - op_lim_fr->min_pll_ip_clk_freq_hz, - op_lim_fr->max_pll_ip_clk_freq_hz, - "pll_ip_clk_freq_hz"); - if (!rval) - rval = bounds_check( - dev, op_pll_fr->pll_multiplier, - op_lim_fr->min_pll_multiplier, - op_lim_fr->max_pll_multiplier, "pll_multiplier"); - if (!rval) - rval = bounds_check( - dev, op_pll_fr->pll_op_clk_freq_hz, - op_lim_fr->min_pll_op_clk_freq_hz, - op_lim_fr->max_pll_op_clk_freq_hz, "pll_op_clk_freq_hz"); + if (which == PLL_OP) { + lim_fr = &lim->op_fr; + pll_fr = &pll->op_fr; + } else { + lim_fr = &lim->vt_fr; + pll_fr = &pll->vt_fr; + } + + rval = bounds_check(dev, pll_fr->pre_pll_clk_div, + lim_fr->min_pre_pll_clk_div, + lim_fr->max_pre_pll_clk_div, s, "pre_pll_clk_div"); + if (!rval) - rval = bounds_check( - dev, op_pll_bk->sys_clk_div, - op_lim_bk->min_sys_clk_div, op_lim_bk->max_sys_clk_div, - "op_sys_clk_div"); + rval = bounds_check(dev, pll_fr->pll_ip_clk_freq_hz, + lim_fr->min_pll_ip_clk_freq_hz, + lim_fr->max_pll_ip_clk_freq_hz, + s, "pll_ip_clk_freq_hz"); if (!rval) - rval = bounds_check( - dev, op_pll_bk->sys_clk_freq_hz, - op_lim_bk->min_sys_clk_freq_hz, - op_lim_bk->max_sys_clk_freq_hz, - "op_sys_clk_freq_hz"); + rval = bounds_check(dev, pll_fr->pll_multiplier, + lim_fr->min_pll_multiplier, + lim_fr->max_pll_multiplier, + s, "pll_multiplier"); if (!rval) - rval = bounds_check( - dev, op_pll_bk->pix_clk_freq_hz, - op_lim_bk->min_pix_clk_freq_hz, - op_lim_bk->max_pix_clk_freq_hz, - "op_pix_clk_freq_hz"); + rval = bounds_check(dev, pll_fr->pll_op_clk_freq_hz, + lim_fr->min_pll_op_clk_freq_hz, + lim_fr->max_pll_op_clk_freq_hz, + s, "pll_op_clk_freq_hz"); - /* - * If there are no OP clocks, the VT clocks are contained in - * the OP clock struct. - */ - if (pll->flags & CCS_PLL_FLAG_NO_OP_CLOCKS) - return rval; + return rval; +} + +static int check_bk_bounds(struct device *dev, + const struct ccs_pll_limits *lim, + struct ccs_pll *pll, unsigned int which) +{ + const struct ccs_pll_branch_limits_bk *lim_bk; + struct ccs_pll_branch_bk *pll_bk; + const char *s = pll_string(which); + int rval; + + if (which == PLL_OP) { + if (pll->flags & CCS_PLL_FLAG_NO_OP_CLOCKS) + return 0; + lim_bk = &lim->op_bk; + pll_bk = &pll->op_bk; + } else { + lim_bk = &lim->vt_bk; + pll_bk = &pll->vt_bk; + } + + rval = bounds_check(dev, pll_bk->sys_clk_div, + lim_bk->min_sys_clk_div, + lim_bk->max_sys_clk_div, s, "op_sys_clk_div"); + if (!rval) + rval = bounds_check(dev, pll_bk->sys_clk_freq_hz, + lim_bk->min_sys_clk_freq_hz, + lim_bk->max_sys_clk_freq_hz, + s, "sys_clk_freq_hz"); if (!rval) - rval = bounds_check( - dev, pll->vt_bk.sys_clk_freq_hz, - lim->vt_bk.min_sys_clk_freq_hz, - lim->vt_bk.max_sys_clk_freq_hz, - "vt_sys_clk_freq_hz"); + rval = bounds_check(dev, pll_bk->sys_clk_div, + lim_bk->min_sys_clk_div, + lim_bk->max_sys_clk_div, + s, "sys_clk_div"); if (!rval) - rval = bounds_check( - dev, pll->vt_bk.pix_clk_freq_hz, - lim->vt_bk.min_pix_clk_freq_hz, - lim->vt_bk.max_pix_clk_freq_hz, - "vt_pix_clk_freq_hz"); + rval = bounds_check(dev, pll_bk->pix_clk_freq_hz, + lim_bk->min_pix_clk_freq_hz, + lim_bk->max_pix_clk_freq_hz, + s, "pix_clk_freq_hz"); + + return rval; +} +static int check_ext_bounds(struct device *dev, struct ccs_pll *pll) +{ if (!(pll->flags & CCS_PLL_FLAG_FIFO_DERATING) && pll->pixel_rate_pixel_array > pll->pixel_rate_csi) { dev_dbg(dev, "device does not support derating\n"); @@ -201,7 +225,7 @@ static int check_all_bounds(struct device *dev, return -EINVAL; } - return rval; + return 0; } #define CPHY_CONST 7 @@ -610,11 +634,21 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim, if (rval) continue; + rval = check_fr_bounds(dev, lim, pll, PLL_VT); + if (rval) + continue; + + rval = check_bk_bounds(dev, lim, pll, PLL_OP); + if (rval) + continue; + ccs_pll_calculate_vt(dev, lim, op_lim_bk, pll, op_pll_fr, op_pll_bk, cphy, phy_const); - rval = check_all_bounds(dev, lim, op_lim_fr, op_lim_bk, pll, - op_pll_fr, op_pll_bk); + rval = check_bk_bounds(dev, lim, pll, PLL_VT); + if (rval) + continue; + rval = check_ext_bounds(dev, pll); if (rval) continue; diff --git a/drivers/media/i2c/ccs-pll.h b/drivers/media/i2c/ccs-pll.h index 03c2428c76cd..6255803eee38 100644 --- a/drivers/media/i2c/ccs-pll.h +++ b/drivers/media/i2c/ccs-pll.h @@ -86,6 +86,7 @@ struct ccs_pll_branch_bk { * (input) * @vt_fr: Video timing front-end configuration (output) * @vt_bk: Video timing back-end configuration (output) + * @op_fr: Operational timing front-end configuration (output) * @op_bk: Operational timing back-end configuration (output) * @pixel_rate_csi: Pixel rate on the output data bus (output) * @pixel_rate_pixel_array: Nominal pixel rate in the sensor's pixel array @@ -112,6 +113,7 @@ struct ccs_pll { /* output values */ struct ccs_pll_branch_fr vt_fr; struct ccs_pll_branch_bk vt_bk; + struct ccs_pll_branch_fr op_fr; struct ccs_pll_branch_bk op_bk; uint32_t pixel_rate_csi; @@ -171,6 +173,7 @@ struct ccs_pll_branch_limits_bk { * @max_ext_clk_freq_hz: Maximum external clock frequency * @vt_fr: Video timing front-end limits * @vt_bk: Video timing back-end limits + * @op_fr: Operational timing front-end limits * @op_bk: Operational timing back-end limits * @min_line_length_pck_bin: Minimum line length in pixels, with binning * @min_line_length_pck: Minimum line length in pixels without binning @@ -182,6 +185,7 @@ struct ccs_pll_limits { struct ccs_pll_branch_limits_fr vt_fr; struct ccs_pll_branch_limits_bk vt_bk; + struct ccs_pll_branch_limits_fr op_fr; struct ccs_pll_branch_limits_bk op_bk; /* Other relevant limits */ |