drm/omap: move HDMI PLL calc function to pll.c

Move hdmi_pll_compute(), used to calculate the config for HDMI PLL, from
hdmi_pll.c to pll.c, with the name of dss_pll_calc_b(), to make it
available to non-HDMI users.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/dss/dss.h

@@ -441,6 +441,10 @@ bool dss_pll_hsdiv_calc_a(const struct dss_pll *pll, unsigned long clkdco,
 bool dss_pll_calc_a(const struct dss_pll *pll, unsigned long clkin,
 		unsigned long pll_min, unsigned long pll_max,
 		dss_pll_calc_func func, void *data);
+
+bool dss_pll_calc_b(const struct dss_pll *pll, unsigned long clkin,
+	unsigned long target_tmds, struct dss_pll_clock_info *cinfo);
+
 int dss_pll_write_config_type_a(struct dss_pll *pll,
 		const struct dss_pll_clock_info *cinfo);
 int dss_pll_write_config_type_b(struct dss_pll *pll,

drivers/gpu/drm/omapdrm/dss/hdmi.h

@@ -307,8 +307,6 @@ phys_addr_t hdmi_wp_get_audio_dma_addr(struct hdmi_wp_data *wp);
 
 /* HDMI PLL funcs */
 void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s);
-void hdmi_pll_compute(struct hdmi_pll_data *pll,
-	unsigned long target_tmds, struct dss_pll_clock_info *pi);
 int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
 	struct hdmi_wp_data *wp);
 void hdmi_pll_uninit(struct hdmi_pll_data *hpll);

drivers/gpu/drm/omapdrm/dss/hdmi4.c

@@ -186,7 +186,8 @@ static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 	if (p->double_pixel)
 		pc *= 2;
 
-	hdmi_pll_compute(&hdmi.pll, pc, &hdmi_cinfo);
+	dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
+		pc, &hdmi_cinfo);
 
 	r = dss_pll_enable(&hdmi.pll.pll);
 	if (r) {

drivers/gpu/drm/omapdrm/dss/hdmi5.c

@@ -198,7 +198,8 @@ static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 	if (p->double_pixel)
 		pc *= 2;
 
-	hdmi_pll_compute(&hdmi.pll, pc, &hdmi_cinfo);
+	dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
+		pc, &hdmi_cinfo);
 
 	/* disable and clear irqs */
 	hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);

drivers/gpu/drm/omapdrm/dss/hdmi_pll.c

@@ -39,66 +39,6 @@ void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s)
 	DUMPPLL(PLLCTRL_CFG4);
 }
 
-void hdmi_pll_compute(struct hdmi_pll_data *pll,
-	unsigned long target_tmds, struct dss_pll_clock_info *pi)
-{
-	unsigned long fint, clkdco, clkout;
-	unsigned long target_bitclk, target_clkdco;
-	unsigned long min_dco;
-	unsigned n, m, mf, m2, sd;
-	unsigned long clkin;
-	const struct dss_pll_hw *hw = pll->pll.hw;
-
-	clkin = clk_get_rate(pll->pll.clkin);
-
-	DSSDBG("clkin %lu, target tmds %lu\n", clkin, target_tmds);
-
-	target_bitclk = target_tmds * 10;
-
-	/* Fint */
-	n = DIV_ROUND_UP(clkin, hw->fint_max);
-	fint = clkin / n;
-
-	/* adjust m2 so that the clkdco will be high enough */
-	min_dco = roundup(hw->clkdco_min, fint);
-	m2 = DIV_ROUND_UP(min_dco, target_bitclk);
-	if (m2 == 0)
-		m2 = 1;
-
-	target_clkdco = target_bitclk * m2;
-	m = target_clkdco / fint;
-
-	clkdco = fint * m;
-
-	/* adjust clkdco with fractional mf */
-	if (WARN_ON(target_clkdco - clkdco > fint))
-		mf = 0;
-	else
-		mf = (u32)div_u64(262144ull * (target_clkdco - clkdco), fint);
-
-	if (mf > 0)
-		clkdco += (u32)div_u64((u64)mf * fint, 262144);
-
-	clkout = clkdco / m2;
-
-	/* sigma-delta */
-	sd = DIV_ROUND_UP(fint * m, 250000000);
-
-	DSSDBG("N = %u, M = %u, M.f = %u, M2 = %u, SD = %u\n",
-		n, m, mf, m2, sd);
-	DSSDBG("Fint %lu, clkdco %lu, clkout %lu\n", fint, clkdco, clkout);
-
-	pi->n = n;
-	pi->m = m;
-	pi->mf = mf;
-	pi->mX[0] = m2;
-	pi->sd = sd;
-
-	pi->fint = fint;
-	pi->clkdco = clkdco;
-	pi->clkout[0] = clkout;
-}
-
 static int hdmi_pll_enable(struct dss_pll *dsspll)
 {
 	struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);

drivers/gpu/drm/omapdrm/dss/pll.c

@@ -248,6 +248,65 @@ bool dss_pll_calc_a(const struct dss_pll *pll, unsigned long clkin,
 	return false;
 }
 
+bool dss_pll_calc_b(const struct dss_pll *pll, unsigned long clkin,
+	unsigned long target_tmds, struct dss_pll_clock_info *cinfo)
+{
+	unsigned long fint, clkdco, clkout;
+	unsigned long target_bitclk, target_clkdco;
+	unsigned long min_dco;
+	unsigned n, m, mf, m2, sd;
+	const struct dss_pll_hw *hw = pll->hw;
+
+	DSSDBG("clkin %lu, target tmds %lu\n", clkin, target_tmds);
+
+	target_bitclk = target_tmds * 10;
+
+	/* Fint */
+	n = DIV_ROUND_UP(clkin, hw->fint_max);
+	fint = clkin / n;
+
+	/* adjust m2 so that the clkdco will be high enough */
+	min_dco = roundup(hw->clkdco_min, fint);
+	m2 = DIV_ROUND_UP(min_dco, target_bitclk);
+	if (m2 == 0)
+		m2 = 1;
+
+	target_clkdco = target_bitclk * m2;
+	m = target_clkdco / fint;
+
+	clkdco = fint * m;
+
+	/* adjust clkdco with fractional mf */
+	if (WARN_ON(target_clkdco - clkdco > fint))
+		mf = 0;
+	else
+		mf = (u32)div_u64(262144ull * (target_clkdco - clkdco), fint);
+
+	if (mf > 0)
+		clkdco += (u32)div_u64((u64)mf * fint, 262144);
+
+	clkout = clkdco / m2;
+
+	/* sigma-delta */
+	sd = DIV_ROUND_UP(fint * m, 250000000);
+
+	DSSDBG("N = %u, M = %u, M.f = %u, M2 = %u, SD = %u\n",
+		n, m, mf, m2, sd);
+	DSSDBG("Fint %lu, clkdco %lu, clkout %lu\n", fint, clkdco, clkout);
+
+	cinfo->n = n;
+	cinfo->m = m;
+	cinfo->mf = mf;
+	cinfo->mX[0] = m2;
+	cinfo->sd = sd;
+
+	cinfo->fint = fint;
+	cinfo->clkdco = clkdco;
+	cinfo->clkout[0] = clkout;
+
+	return true;
+}
+
 static int wait_for_bit_change(void __iomem *reg, int bitnum, int value)
 {
 	unsigned long timeout;