149 lines
5.2 KiB
Diff
149 lines
5.2 KiB
Diff
From 6eca6c329b247adab647f1d4b380cd630f923806 Mon Sep 17 00:00:00 2001
|
|
From: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
|
|
Date: Thu, 15 Jul 2021 01:07:58 +0200
|
|
Subject: [PATCH] drm/vc4: Add support for more analog TV standards
|
|
|
|
Add support for the following composite output modes (all of them are
|
|
somewhat more obscure than the previously defined ones):
|
|
|
|
- NTSC_443 - NTSC-style signal with the chroma subcarrier shifted to
|
|
4.43361875 MHz (the PAL subcarrier frequency). Never used for
|
|
broadcasting, but sometimes used as a hack to play NTSC content in PAL
|
|
regions (e.g. on VCRs).
|
|
- PAL_N - PAL with alternative chroma subcarrier frequency,
|
|
3.58205625 MHz. Used as a broadcast standard in Argentina, Paraguay
|
|
and Uruguay to fit 576i50 with colour in 6 MHz channel raster.
|
|
- PAL60 - 480i60 signal with PAL-style color at normal European PAL
|
|
frequency. Another non-standard, non-broadcast mode, used in similar
|
|
contexts as NTSC_443. Some displays support one but not the other.
|
|
- SECAM - French frequency-modulated analog color standard; also have
|
|
been broadcast in Eastern Europe and various parts of Africa and Asia.
|
|
Uses the same 576i50 timings as PAL.
|
|
|
|
Also added some comments explaining color subcarrier frequency
|
|
registers.
|
|
|
|
Signed-off-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_vec.c | 63 +++++++++++++++++++++++++++++++++++
|
|
1 file changed, 63 insertions(+)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_vec.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
|
|
@@ -45,6 +45,7 @@
|
|
#define VEC_CONFIG0_YDEL(x) ((x) << 26)
|
|
#define VEC_CONFIG0_CDEL_MASK GENMASK(25, 24)
|
|
#define VEC_CONFIG0_CDEL(x) ((x) << 24)
|
|
+#define VEC_CONFIG0_SECAM_STD BIT(21)
|
|
#define VEC_CONFIG0_PBPR_FIL BIT(18)
|
|
#define VEC_CONFIG0_CHROMA_GAIN_MASK GENMASK(17, 16)
|
|
#define VEC_CONFIG0_CHROMA_GAIN_UNITY (0 << 16)
|
|
@@ -75,6 +76,27 @@
|
|
#define VEC_SOFT_RESET 0x10c
|
|
#define VEC_CLMP0_START 0x144
|
|
#define VEC_CLMP0_END 0x148
|
|
+
|
|
+/*
|
|
+ * These set the color subcarrier frequency
|
|
+ * if VEC_CONFIG1_CUSTOM_FREQ is enabled.
|
|
+ *
|
|
+ * VEC_FREQ1_0 contains the most significant 16-bit half-word,
|
|
+ * VEC_FREQ3_2 contains the least significant 16-bit half-word.
|
|
+ * 0x80000000 seems to be equivalent to the pixel clock
|
|
+ * (which itself is the VEC clock divided by 8).
|
|
+ *
|
|
+ * Reference values (with the default pixel clock of 13.5 MHz):
|
|
+ *
|
|
+ * NTSC (3579545.[45] Hz) - 0x21F07C1F
|
|
+ * PAL (4433618.75 Hz) - 0x2A098ACB
|
|
+ * PAL-M (3575611.[888111] Hz) - 0x21E6EFE3
|
|
+ * PAL-N (3582056.25 Hz) - 0x21F69446
|
|
+ *
|
|
+ * NOTE: For SECAM, it is used as the Dr center frequency,
|
|
+ * regardless of whether VEC_CONFIG1_CUSTOM_FREQ is enabled or not;
|
|
+ * that is specified as 4406250 Hz, which corresponds to 0x29C71C72.
|
|
+ */
|
|
#define VEC_FREQ3_2 0x180
|
|
#define VEC_FREQ1_0 0x184
|
|
|
|
@@ -117,6 +139,14 @@
|
|
|
|
#define VEC_INTERRUPT_CONTROL 0x190
|
|
#define VEC_INTERRUPT_STATUS 0x194
|
|
+
|
|
+/*
|
|
+ * Db center frequency for SECAM; the clock for this is the same as for
|
|
+ * VEC_FREQ3_2/VEC_FREQ1_0, which is used for Dr center frequency.
|
|
+ *
|
|
+ * This is specified as 4250000 Hz, which corresponds to 0x284BDA13.
|
|
+ * That is also the default value, so no need to set it explicitly.
|
|
+ */
|
|
#define VEC_FCW_SECAM_B 0x198
|
|
#define VEC_SECAM_GAIN_VAL 0x19c
|
|
|
|
@@ -210,8 +240,12 @@ to_vc4_vec_connector(struct drm_connecto
|
|
enum vc4_vec_tv_mode_id {
|
|
VC4_VEC_TV_MODE_NTSC,
|
|
VC4_VEC_TV_MODE_NTSC_J,
|
|
+ VC4_VEC_TV_MODE_NTSC_443,
|
|
VC4_VEC_TV_MODE_PAL,
|
|
VC4_VEC_TV_MODE_PAL_M,
|
|
+ VC4_VEC_TV_MODE_PAL_N,
|
|
+ VC4_VEC_TV_MODE_PAL60,
|
|
+ VC4_VEC_TV_MODE_SECAM,
|
|
};
|
|
|
|
struct vc4_vec_tv_mode {
|
|
@@ -273,6 +307,13 @@ static const struct vc4_vec_tv_mode vc4_
|
|
.config0 = VEC_CONFIG0_NTSC_STD,
|
|
.config1 = VEC_CONFIG1_C_CVBS_CVBS,
|
|
},
|
|
+ [VC4_VEC_TV_MODE_NTSC_443] = {
|
|
+ /* NTSC with PAL chroma frequency */
|
|
+ .mode = &drm_mode_480i,
|
|
+ .config0 = VEC_CONFIG0_NTSC_STD,
|
|
+ .config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
|
|
+ .custom_freq = 0x2a098acb,
|
|
+ },
|
|
[VC4_VEC_TV_MODE_PAL] = {
|
|
.mode = &drm_mode_576i,
|
|
.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
|
|
@@ -283,6 +324,24 @@ static const struct vc4_vec_tv_mode vc4_
|
|
.config0 = VEC_CONFIG0_PAL_M_STD,
|
|
.config1 = VEC_CONFIG1_C_CVBS_CVBS,
|
|
},
|
|
+ [VC4_VEC_TV_MODE_PAL_N] = {
|
|
+ .mode = &drm_mode_576i,
|
|
+ .config0 = VEC_CONFIG0_PAL_N_STD,
|
|
+ .config1 = VEC_CONFIG1_C_CVBS_CVBS,
|
|
+ },
|
|
+ [VC4_VEC_TV_MODE_PAL60] = {
|
|
+ /* PAL-M with chroma frequency of regular PAL */
|
|
+ .mode = &drm_mode_480i,
|
|
+ .config0 = VEC_CONFIG0_PAL_M_STD,
|
|
+ .config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
|
|
+ .custom_freq = 0x2a098acb,
|
|
+ },
|
|
+ [VC4_VEC_TV_MODE_SECAM] = {
|
|
+ .mode = &drm_mode_576i,
|
|
+ .config0 = VEC_CONFIG0_SECAM_STD,
|
|
+ .config1 = VEC_CONFIG1_C_CVBS_CVBS,
|
|
+ .custom_freq = 0x29c71c72,
|
|
+ },
|
|
};
|
|
|
|
static enum drm_connector_status
|
|
@@ -505,8 +564,12 @@ static const struct of_device_id vc4_vec
|
|
static const char * const tv_mode_names[] = {
|
|
[VC4_VEC_TV_MODE_NTSC] = "NTSC",
|
|
[VC4_VEC_TV_MODE_NTSC_J] = "NTSC-J",
|
|
+ [VC4_VEC_TV_MODE_NTSC_443] = "NTSC-443",
|
|
[VC4_VEC_TV_MODE_PAL] = "PAL",
|
|
[VC4_VEC_TV_MODE_PAL_M] = "PAL-M",
|
|
+ [VC4_VEC_TV_MODE_PAL_N] = "PAL-N",
|
|
+ [VC4_VEC_TV_MODE_PAL60] = "PAL60",
|
|
+ [VC4_VEC_TV_MODE_SECAM] = "SECAM",
|
|
};
|
|
|
|
static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
|