1 files changed, 80 insertions, 0 deletions

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 752409c7f326..38672f9e5c4f 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -108,6 +108,77 @@ static inline void mga_wait_busy(struct mga_device *mdev)
 	} while ((status & 0x01) && time_before(jiffies, timeout));
 }
 
+/*
+ * PLL setup
+ */
+
+static int mgag200_g200_set_plls(struct mga_device *mdev, long clock)
+{
+	struct drm_device *dev = &mdev->base;
+	const int post_div_max = 7;
+	const int in_div_min = 1;
+	const int in_div_max = 6;
+	const int feed_div_min = 7;
+	const int feed_div_max = 127;
+	u8 testm, testn;
+	u8 n = 0, m = 0, p, s;
+	long f_vco;
+	long computed;
+	long delta, tmp_delta;
+	long ref_clk = mdev->model.g200.ref_clk;
+	long p_clk_min = mdev->model.g200.pclk_min;
+	long p_clk_max =  mdev->model.g200.pclk_max;
+
+	if (clock > p_clk_max) {
+		drm_err(dev, "Pixel Clock %ld too high\n", clock);
+		return 1;
+	}
+
+	if (clock < p_clk_min >> 3)
+		clock = p_clk_min >> 3;
+
+	f_vco = clock;
+	for (p = 0;
+	     p <= post_div_max && f_vco < p_clk_min;
+	     p = (p << 1) + 1, f_vco <<= 1)
+		;
+
+	delta = clock;
+
+	for (testm = in_div_min; testm <= in_div_max; testm++) {
+		for (testn = feed_div_min; testn <= feed_div_max; testn++) {
+			computed = ref_clk * (testn + 1) / (testm + 1);
+			if (computed < f_vco)
+				tmp_delta = f_vco - computed;
+			else
+				tmp_delta = computed - f_vco;
+			if (tmp_delta < delta) {
+				delta = tmp_delta;
+				m = testm;
+				n = testn;
+			}
+		}
+	}
+	f_vco = ref_clk * (n + 1) / (m + 1);
+	if (f_vco < 100000)
+		s = 0;
+	else if (f_vco < 140000)
+		s = 1;
+	else if (f_vco < 180000)
+		s = 2;
+	else
+		s = 3;
+
+	drm_dbg_kms(dev, "clock: %ld vco: %ld m: %d n: %d p: %d s: %d\n",
+		    clock, f_vco, m, n, p, s);
+
+	WREG_DAC(MGA1064_PIX_PLLC_M, m);
+	WREG_DAC(MGA1064_PIX_PLLC_N, n);
+	WREG_DAC(MGA1064_PIX_PLLC_P, (p | (s << 3)));
+
+	return 0;
+}
+
 #define P_ARRAY_SIZE 9
 
 static int mga_g200se_set_plls(struct mga_device *mdev, long clock)
@@ -717,6 +788,9 @@ static int mgag200_crtc_set_plls(struct mga_device *mdev, long clock)
 	u8 misc;
 
 	switch(mdev->type) {
+	case G200_PCI:
+	case G200_AGP:
+		return mgag200_g200_set_plls(mdev, clock);
 	case G200_SE_A:
 	case G200_SE_B:
 		return mga_g200se_set_plls(mdev, clock);
@@ -894,6 +968,12 @@ static void mgag200_set_dac_regs(struct mga_device *mdev)
 	};
 
 	switch (mdev->type) {
+	case G200_PCI:
+	case G200_AGP:
+		dacvalue[MGA1064_SYS_PLL_M] = 0x04;
+		dacvalue[MGA1064_SYS_PLL_N] = 0x2D;
+		dacvalue[MGA1064_SYS_PLL_P] = 0x19;
+		break;
 	case G200_SE_A:
 	case G200_SE_B:
 		dacvalue[MGA1064_VREF_CTL] = 0x03;