6.15-stable review patch. If anyone has any objections, please let me know.
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From: Sakari Ailus sakari.ailus@linux.intel.com
[ Upstream commit cd9cb0313a42ae029cd5af9293b0add984ed252e ]
Check that the VT PLL dividers are actually found, don't trust they always are even though they should be.
Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Hans Verkuil hverkuil@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/i2c/ccs-pll.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c index d985686b0a36b..2051f1f292294 100644 --- a/drivers/media/i2c/ccs-pll.c +++ b/drivers/media/i2c/ccs-pll.c @@ -442,7 +442,7 @@ static int ccs_pll_calculate_vt_tree(struct device *dev, return -EINVAL; }
-static void +static int ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim, const struct ccs_pll_branch_limits_bk *op_lim_bk, struct ccs_pll *pll, struct ccs_pll_branch_fr *pll_fr, @@ -565,6 +565,8 @@ ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim, if (best_pix_div < SHRT_MAX >> 1) break; } + if (best_pix_div == SHRT_MAX >> 1) + return -EINVAL;
pll->vt_bk.sys_clk_div = DIV_ROUND_UP(vt_div, best_pix_div); pll->vt_bk.pix_clk_div = best_pix_div; @@ -577,6 +579,8 @@ ccs_pll_calculate_vt(struct device *dev, const struct ccs_pll_limits *lim, out_calc_pixel_rate: pll->pixel_rate_pixel_array = pll->vt_bk.pix_clk_freq_hz * pll->vt_lanes; + + return 0; }
/* @@ -852,8 +856,10 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim, if (pll->flags & CCS_PLL_FLAG_DUAL_PLL) break;
- ccs_pll_calculate_vt(dev, lim, op_lim_bk, pll, op_pll_fr, - op_pll_bk, cphy, phy_const); + rval = ccs_pll_calculate_vt(dev, lim, op_lim_bk, pll, op_pll_fr, + op_pll_bk, cphy, phy_const); + if (rval) + continue;
rval = check_bk_bounds(dev, lim, pll, PLL_VT); if (rval)