MLK-21150-1 drm/bridge: sec-dsim: change uint64_t clk fields to uint32_t

Change the 'bit_clk' and 'pix_clk' fields of struct sec_mipi_dsim
and the 'bit_clk' field of struct dsim_pll_pms from 'uint64_t' type
to 'uint32_t' type, since first, these two fields are in KHz unit,
and so 32 bit unsigned integer is enough to hold the data values,
and second, use 32 bit integer can simplify related clocks compute.

Signed-off-by: Fancy Fang <chen.fang@nxp.com>
(cherry picked from commit 3e62c748)

drivers/gpu/drm/bridge/sec-dsim.c

 /*
  * Samsung MIPI DSIM Bridge
  *
- * Copyright 2018 NXP
+ * Copyright 2018-2019 NXP
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -289,7 +289,7 @@ struct dsim_hblank_par {
 };
 
 struct dsim_pll_pms {
-	uint64_t bit_clk;	/* kHz */
+	uint32_t bit_clk;	/* kHz */
 	uint32_t p;
 	uint32_t m;
 	uint32_t s;
@@ -312,8 +312,8 @@ struct sec_mipi_dsim {
 	struct clk *pclk;			/* pixel clock */
 
 	/* kHz clocks */
-	uint64_t pix_clk;
-	uint64_t bit_clk;
+	uint32_t pix_clk;
+	uint32_t bit_clk;
 
 	unsigned int lanes;
 	unsigned int channel;			/* virtual channel */
@@ -436,7 +436,7 @@ static const struct dsim_hblank_par *sec_mipi_dsim_get_hblank_par(const char *na
 	return NULL;
 }
 
-static const struct dsim_pll_pms *sec_mipi_dsim_get_pms(uint64_t bit_clk)
+static const struct dsim_pll_pms *sec_mipi_dsim_get_pms(uint32_t bit_clk)
 {
 	int i;
 	const struct dsim_pll_pms *pms;
@@ -1061,7 +1061,7 @@ static void sec_mipi_dsim_init_fifo_pointers(struct sec_mipi_dsim *dsim)
 static void sec_mipi_dsim_config_clkctrl(struct sec_mipi_dsim *dsim)
 {
 	uint32_t clkctrl = 0, data_lanes_en;
-	uint64_t byte_clk, esc_prescaler;
+	uint32_t byte_clk, esc_prescaler;
 
 	clkctrl |= CLKCTRL_TXREQUESTHSCLK;
 
@@ -1083,7 +1083,7 @@ static void sec_mipi_dsim_config_clkctrl(struct sec_mipi_dsim *dsim)
 	 * EscClk = ByteClk / EscPrescaler;
 	 */
 	byte_clk = dsim->bit_clk >> 3;
-	esc_prescaler = DIV_ROUND_UP_ULL(byte_clk, MAX_ESC_CLK_FREQ);
+	esc_prescaler = DIV_ROUND_UP(byte_clk, MAX_ESC_CLK_FREQ);
 	clkctrl |= CLKCTRL_SET_ESCPRESCALER(esc_prescaler);
 
 	dsim_write(dsim, clkctrl, DSIM_CLKCTRL);
@@ -1108,7 +1108,7 @@ int sec_mipi_dsim_check_pll_out(void *driver_private,
 				const struct drm_display_mode *mode)
 {
 	int bpp;
-	uint64_t pix_clk, bit_clk, ref_clk;
+	uint32_t pix_clk, bit_clk, ref_clk;
 	struct sec_mipi_dsim *dsim = driver_private;
 	const struct sec_mipi_dsim_plat_data *pdata = dsim->pdata;
 	const struct dsim_hblank_par *hpar;
@@ -1118,17 +1118,17 @@ int sec_mipi_dsim_check_pll_out(void *driver_private,
 	if (bpp < 0)
 		return -EINVAL;
 
-	pix_clk = (uint64_t)mode->clock * 1000;
-	bit_clk = DIV_ROUND_UP_ULL(pix_clk * bpp, dsim->lanes);
+	pix_clk = mode->clock;
+	bit_clk = DIV_ROUND_UP(pix_clk * bpp, dsim->lanes);
 
-	if (bit_clk > pdata->max_data_rate) {
+	if (bit_clk * 1000 > pdata->max_data_rate) {
 		dev_err(dsim->dev,
 			"reuest bit clk freq exceeds lane's maximum value\n");
 		return -EINVAL;
 	}
 
-	dsim->pix_clk = DIV_ROUND_UP_ULL(pix_clk, 1000);
-	dsim->bit_clk = DIV_ROUND_UP_ULL(bit_clk, 1000);
+	dsim->pix_clk = pix_clk;
+	dsim->bit_clk = bit_clk;
 
 	dsim->pms = 0x4210;
 	dsim->hpar = NULL;