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drm/msm: higher values of pclk can exceed 32 bits when multiplied by a factor

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Make the pclk_rate u64 to accommodate higher pixel clock
rates.

Changes in v3:
- Converted pclk_rate to u32 (Archit)
- Rebase on dsi cleanup set in msm-next

Cc: Sibi Sankar <sibis@codeaurora.org>
Cc: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Abhinav Kumar 2018-06-07 13:50:29 -07:00 committed by Sean Paul
parent bb676df12b
commit 2d0b10fc51
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/msm/dsi/dsi_host.c
View file

@ -702,6 +702,7 @@ int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_dual_dsi)
u8 lanes = msm_host->lanes;
u32 bpp = dsi_get_bpp(msm_host->format);
u32 pclk_rate;
u64 pclk_bpp;
unsigned int esc_mhz, esc_div;
unsigned long byte_mhz;
@ -716,13 +717,15 @@ int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_dual_dsi)
if (is_dual_dsi)
pclk_rate /= 2;
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);
}
msm_host->pixel_clk_rate = pclk_rate;
msm_host->byte_clk_rate = pclk_bpp;
DBG("pclk=%d, bclk=%d", msm_host->pixel_clk_rate,
msm_host->byte_clk_rate);