Simplify calculatoins around pixel_clk_rate division. Replace common
pattern of doing 64-bit multiplication and then a do_div() call with
simpler mult_frac call.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 2b257b459974..744f2398a6d6 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -585,7 +585,7 @@ unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_d
u8 lanes = msm_host->lanes;
u32 bpp = dsi_get_bpp(msm_host->format);
unsigned long pclk_rate = dsi_get_pclk_rate(mode, is_bonded_dsi);
- u64 pclk_bpp = (u64)pclk_rate * bpp;
+ unsigned long pclk_bpp;
if (lanes == 0) {
pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
@@ -594,9 +594,9 @@ unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_d
/* CPHY "byte_clk" is in units of 16 bits */
if (msm_host->cphy_mode)
- do_div(pclk_bpp, (16 * lanes));
+ pclk_bpp = mult_frac(pclk_rate, bpp, 16 * lanes);
else
- do_div(pclk_bpp, (8 * lanes));
+ pclk_bpp = mult_frac(pclk_rate, bpp, 8 * lanes);
return pclk_bpp;
}
@@ -627,15 +627,12 @@ int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
{
u32 bpp = dsi_get_bpp(msm_host->format);
- u64 pclk_bpp;
unsigned int esc_mhz, esc_div;
unsigned long byte_mhz;
dsi_calc_pclk(msm_host, is_bonded_dsi);
- pclk_bpp = (u64)msm_host->pixel_clk_rate * bpp;
- do_div(pclk_bpp, 8);
- msm_host->src_clk_rate = pclk_bpp;
+ msm_host->src_clk_rate = mult_frac(msm_host->pixel_clk_rate, bpp, 8);
/*
* esc clock is byte clock followed by a 4 bit divider,
--
2.39.2
