Higher values of pclk can exceed 32 bits when multiplied
by a factor.
Make the pclk_rate u64 to accommodate higher pixel clock
rates.
Signed-off-by: Abhinav Kumar <abhinavk@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index b916f46..5a04f2d 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -668,7 +668,8 @@ static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
u8 lanes = msm_host->lanes;
u32 bpp = dsi_get_bpp(msm_host->format);
- u32 pclk_rate;
+ u64 pclk_rate;
+ u64 pclk_bpp;
if (!mode) {
pr_err("%s: mode not set\n", __func__);
@@ -676,14 +677,18 @@ static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
}
pclk_rate = mode->clock * 1000;
+ pclk_bpp = pclk_rate * bpp;
+
if (lanes > 0) {
- msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
+ do_div(pclk_bpp, (8 * lanes));
} else {
pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
- msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
+ do_div(pclk_bpp, 8);
}
- DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
+ msm_host->byte_clk_rate = pclk_bpp;
+
+ DBG("pclk=%llu, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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