drm/radeon/kms: fix pal tv-out support on legacy IGP chips

Based on ddx patch by Andrzej Hajda.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_legacy_tv.c

@@ -57,6 +57,10 @@
 #define NTSC_TV_PLL_N_14 693
 #define NTSC_TV_PLL_P_14 7
 
+#define PAL_TV_PLL_M_14 19
+#define PAL_TV_PLL_N_14 353
+#define PAL_TV_PLL_P_14 5
+
 #define VERT_LEAD_IN_LINES 2
 #define FRAC_BITS 0xe
 #define FRAC_MASK 0x3fff
@@ -208,6 +212,21 @@ static const struct radeon_tv_mode_constants available_tv_modes[] = {
 		8,                  /* crtcPLL_postDiv */
 		1022,               /* pixToTV */
 	},
+	{ /* PAL timing for 14 Mhz ref clk */
+		800,                /* horResolution */
+		600,                /* verResolution */
+		TV_STD_PAL,         /* standard */
+		1131,               /* horTotal */
+		742,                /* verTotal */
+		813,                /* horStart */
+		840,                /* horSyncStart */
+		633,                /* verSyncStart */
+		708369,             /* defRestart */
+		211,                /* crtcPLL_N */
+		9,                  /* crtcPLL_M */
+		8,                  /* crtcPLL_postDiv */
+		759,                /* pixToTV */
+	},
 };
 
 #define N_AVAILABLE_MODES ARRAY_SIZE(available_tv_modes)
@@ -242,7 +261,7 @@ static const struct radeon_tv_mode_constants *radeon_legacy_tv_get_std_mode(stru
 		if (pll->reference_freq == 2700)
 			const_ptr = &available_tv_modes[1];
 		else
-			const_ptr = &available_tv_modes[1]; /* FIX ME */
+			const_ptr = &available_tv_modes[3];
 	}
 	return const_ptr;
 }
@@ -685,9 +704,9 @@ void radeon_legacy_tv_mode_set(struct drm_encoder *encoder,
 			n = PAL_TV_PLL_N_27;
 			p = PAL_TV_PLL_P_27;
 		} else {
-			m = PAL_TV_PLL_M_27;
-			n = PAL_TV_PLL_N_27;
-			p = PAL_TV_PLL_P_27;
+			m = PAL_TV_PLL_M_14;
+			n = PAL_TV_PLL_N_14;
+			p = PAL_TV_PLL_P_14;
 		}
 	}