From fd0b5aec6d320f10b869cae06b6f2c8ca650e8e2 Mon Sep 17 00:00:00 2001
From: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Date: Thu, 15 Jul 2021 01:07:53 +0200
Subject: [PATCH] drm/vc4: Fix definition of PAL-M mode

PAL-M is a Brazilian analog TV standard that uses a PAL-style chroma
subcarrier at 3.575611[888111] MHz on top of 525-line (480i60) timings.
This commit makes the driver actually use the proper VEC preset for this
mode instead of just changing PAL subcarrier frequency.

DRM mode constant names have also been changed, as they no longer
correspond to the "NTSC" or "PAL" terms.

Signed-off-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
---
 drivers/gpu/drm/vc4/vc4_vec.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_vec.c
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
@@ -68,6 +68,7 @@
 #define VEC_CONFIG0_STD_MASK		GENMASK(1, 0)
 #define VEC_CONFIG0_NTSC_STD		0
 #define VEC_CONFIG0_PAL_BDGHI_STD	1
+#define VEC_CONFIG0_PAL_M_STD		2
 #define VEC_CONFIG0_PAL_N_STD		3
 
 #define VEC_SCHPH			0x108
@@ -247,14 +248,14 @@ static const struct debugfs_reg32 vec_re
 	VC4_REG32(VEC_DAC_MISC),
 };
 
-static const struct drm_display_mode ntsc_mode = {
+static const struct drm_display_mode drm_mode_480i = {
 	DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 13500,
 		 720, 720 + 14, 720 + 14 + 64, 720 + 14 + 64 + 60, 0,
 		 480, 480 + 7, 480 + 7 + 6, 525, 0,
 		 DRM_MODE_FLAG_INTERLACE)
 };
 
-static const struct drm_display_mode pal_mode = {
+static const struct drm_display_mode drm_mode_576i = {
 	DRM_MODE("720x576", DRM_MODE_TYPE_DRIVER, 13500,
 		 720, 720 + 20, 720 + 20 + 64, 720 + 20 + 64 + 60, 0,
 		 576, 576 + 4, 576 + 4 + 6, 625, 0,
@@ -263,25 +264,24 @@ static const struct drm_display_mode pal
 
 static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
 	[VC4_VEC_TV_MODE_NTSC] = {
-		.mode = &ntsc_mode,
+		.mode = &drm_mode_480i,
 		.config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
 		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 	[VC4_VEC_TV_MODE_NTSC_J] = {
-		.mode = &ntsc_mode,
+		.mode = &drm_mode_480i,
 		.config0 = VEC_CONFIG0_NTSC_STD,
 		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 	[VC4_VEC_TV_MODE_PAL] = {
-		.mode = &pal_mode,
+		.mode = &drm_mode_576i,
 		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
 		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 	[VC4_VEC_TV_MODE_PAL_M] = {
-		.mode = &pal_mode,
-		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
-		.config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
-		.custom_freq = 0x223b61d1,
+		.mode = &drm_mode_480i,
+		.config0 = VEC_CONFIG0_PAL_M_STD,
+		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 };
 
