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openwrt-owl/target/linux/brcm2708/patches-4.4/0522-drm-vc4-Set-up-the-AVI...

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From 76359522fa9c449fb715d1933523c153cc1871f3 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 29 Sep 2016 10:34:21 -0700
Subject: [PATCH] drm/vc4: Set up the AVI and SPD infoframes.
Fixes a purple bar on the left side of the screen with my Dell
2408WFP. It will also be required for supporting the double-clocked
video modes.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 136 +++++++++++++++++++++++++++++++++++++++--
drivers/gpu/drm/vc4/vc4_regs.h | 5 ++
2 files changed, 136 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -62,6 +62,8 @@ struct vc4_hdmi {
struct vc4_hdmi_encoder {
struct vc4_encoder base;
bool hdmi_monitor;
+ bool limited_rgb_range;
+ bool rgb_range_selectable;
};
static inline struct vc4_hdmi_encoder *
@@ -205,6 +207,12 @@ static int vc4_hdmi_connector_get_modes(
return -ENODEV;
vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
+
+ if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
+ vc4_encoder->rgb_range_selectable =
+ drm_rgb_quant_range_selectable(edid);
+ }
+
drm_mode_connector_update_edid_property(connector, edid);
ret = drm_add_edid_modes(connector, edid);
@@ -281,6 +289,117 @@ static const struct drm_encoder_funcs vc
.destroy = vc4_hdmi_encoder_destroy,
};
+static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
+ enum hdmi_infoframe_type type)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ u32 packet_id = type - 0x80;
+
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
+
+ return wait_for(!(HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
+ BIT(packet_id)), 100);
+}
+
+static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
+ union hdmi_infoframe *frame)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ u32 packet_id = frame->any.type - 0x80;
+ u32 packet_reg = VC4_HDMI_GCP_0 + VC4_HDMI_PACKET_STRIDE * packet_id;
+ uint8_t buffer[VC4_HDMI_PACKET_STRIDE];
+ ssize_t len, i;
+ int ret;
+
+ WARN_ONCE(!(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
+ VC4_HDMI_RAM_PACKET_ENABLE),
+ "Packet RAM has to be on to store the packet.");
+
+ len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
+ if (len < 0)
+ return;
+
+ ret = vc4_hdmi_stop_packet(encoder, frame->any.type);
+ if (ret) {
+ DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
+ return;
+ }
+
+ for (i = 0; i < len; i += 7) {
+ HDMI_WRITE(packet_reg,
+ buffer[i + 0] << 0 |
+ buffer[i + 1] << 8 |
+ buffer[i + 2] << 16);
+ packet_reg += 4;
+
+ HDMI_WRITE(packet_reg,
+ buffer[i + 3] << 0 |
+ buffer[i + 4] << 8 |
+ buffer[i + 5] << 16 |
+ buffer[i + 6] << 24);
+ packet_reg += 4;
+ }
+
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
+ ret = wait_for((HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
+ BIT(packet_id)), 100);
+ if (ret)
+ DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
+}
+
+static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+{
+ struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ union hdmi_infoframe frame;
+ int ret;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode);
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill AVI infoframe\n");
+ return;
+ }
+
+ if (vc4_encoder->rgb_range_selectable) {
+ if (vc4_encoder->limited_rgb_range) {
+ frame.avi.quantization_range =
+ HDMI_QUANTIZATION_RANGE_LIMITED;
+ } else {
+ frame.avi.quantization_range =
+ HDMI_QUANTIZATION_RANGE_FULL;
+ }
+ }
+
+ vc4_hdmi_write_infoframe(encoder, &frame);
+}
+
+static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
+{
+ union hdmi_infoframe frame;
+ int ret;
+
+ ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill SPD infoframe\n");
+ return;
+ }
+
+ frame.spd.sdi = HDMI_SPD_SDI_PC;
+
+ vc4_hdmi_write_infoframe(encoder, &frame);
+}
+
+static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
+{
+ vc4_hdmi_set_avi_infoframe(encoder);
+ vc4_hdmi_set_spd_infoframe(encoder);
+}
+
static void vc4_hdmi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *unadjusted_mode,
struct drm_display_mode *mode)
@@ -349,8 +468,9 @@ static void vc4_hdmi_encoder_mode_set(st
if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
/* CEA VICs other than #1 requre limited range RGB
- * output. Apply a colorspace conversion to squash
- * 0-255 down to 16-235. The matrix here is:
+ * output unless overridden by an AVI infoframe.
+ * Apply a colorspace conversion to squash 0-255 down
+ * to 16-235. The matrix here is:
*
* [ 0 0 0.8594 16]
* [ 0 0.8594 0 16]
@@ -368,6 +488,9 @@ static void vc4_hdmi_encoder_mode_set(st
HD_WRITE(VC4_HD_CSC_24_23, (0x100 << 16) | 0x000);
HD_WRITE(VC4_HD_CSC_32_31, (0x000 << 16) | 0x6e0);
HD_WRITE(VC4_HD_CSC_34_33, (0x100 << 16) | 0x000);
+ vc4_encoder->limited_rgb_range = true;
+ } else {
+ vc4_encoder->limited_rgb_range = false;
}
/* The RGB order applies even when CSC is disabled. */
@@ -386,6 +509,8 @@ static void vc4_hdmi_encoder_disable(str
struct drm_device *dev = encoder->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG, 0);
+
HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
HD_WRITE(VC4_HD_VID_CTL,
HD_READ(VC4_HD_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
@@ -438,9 +563,10 @@ static void vc4_hdmi_encoder_enable(stru
HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
- /* XXX: Set HDMI_RAM_PACKET_CONFIG (1 << 16) and set
- * up the infoframe.
- */
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ VC4_HDMI_RAM_PACKET_ENABLE);
+
+ vc4_hdmi_set_infoframes(encoder);
drift = HDMI_READ(VC4_HDMI_FIFO_CTL);
drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -443,6 +443,8 @@
#define VC4_HDMI_RAM_PACKET_CONFIG 0x0a0
# define VC4_HDMI_RAM_PACKET_ENABLE BIT(16)
+#define VC4_HDMI_RAM_PACKET_STATUS 0x0a4
+
#define VC4_HDMI_HORZA 0x0c4
# define VC4_HDMI_HORZA_VPOS BIT(14)
# define VC4_HDMI_HORZA_HPOS BIT(13)
@@ -504,6 +506,9 @@
#define VC4_HDMI_TX_PHY_RESET_CTL 0x2c0
+#define VC4_HDMI_GCP_0 0x400
+#define VC4_HDMI_PACKET_STRIDE 0x24
+
#define VC4_HD_M_CTL 0x00c
# define VC4_HD_M_REGISTER_FILE_STANDBY (3 << 6)
# define VC4_HD_M_RAM_STANDBY (3 << 4)
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