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openwrt/target/linux/bcm27xx/patches-5.4/950-0247-drm-vc4-FKMS-reads...

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From 52add140c76c0a211ab340ced8e7e1ea8bef9c79 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Tue, 9 Apr 2019 18:23:41 +0100
Subject: [PATCH] drm: vc4: FKMS reads the EDID from fw, and supports
mode setting
This extends FKMS to read the EDID from the display, and support
requesting a particular mode via KMS.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 334 ++++++++++++++++++---
include/soc/bcm2835/raspberrypi-firmware.h | 2 +
2 files changed, 302 insertions(+), 34 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
@@ -91,11 +91,60 @@ struct mailbox_blank_display {
u32 blank;
};
-struct mailbox_get_width_height {
+struct mailbox_get_edid {
struct rpi_firmware_property_tag_header tag1;
- u32 display;
- struct rpi_firmware_property_tag_header tag2;
- u32 wh[2];
+ u32 block;
+ u32 display_number;
+ u8 edid[128];
+};
+
+struct set_timings {
+ u8 display;
+ u8 padding;
+ u16 video_id_code;
+
+ u32 clock; /* in kHz */
+
+ u16 hdisplay;
+ u16 hsync_start;
+
+ u16 hsync_end;
+ u16 htotal;
+
+ u16 hskew;
+ u16 vdisplay;
+
+ u16 vsync_start;
+ u16 vsync_end;
+
+ u16 vtotal;
+ u16 vscan;
+
+ u16 vrefresh;
+ u16 padding2;
+
+ u32 flags;
+#define TIMINGS_FLAGS_H_SYNC_POS BIT(0)
+#define TIMINGS_FLAGS_H_SYNC_NEG 0
+#define TIMINGS_FLAGS_V_SYNC_POS BIT(1)
+#define TIMINGS_FLAGS_V_SYNC_NEG 0
+
+#define TIMINGS_FLAGS_ASPECT_MASK GENMASK(7, 4)
+#define TIMINGS_FLAGS_ASPECT_NONE (0 << 4)
+#define TIMINGS_FLAGS_ASPECT_4_3 (1 << 4)
+#define TIMINGS_FLAGS_ASPECT_16_9 (2 << 4)
+#define TIMINGS_FLAGS_ASPECT_64_27 (3 << 4)
+#define TIMINGS_FLAGS_ASPECT_256_135 (4 << 4)
+
+/* Limited range RGB flag. Not set corresponds to full range. */
+#define TIMINGS_FLAGS_RGB_LIMITED BIT(8)
+/* DVI monitor, therefore disable infoframes. Not set corresponds to HDMI. */
+#define TIMINGS_FLAGS_DVI BIT(9)
+};
+
+struct mailbox_set_mode {
+ struct rpi_firmware_property_tag_header tag1;
+ struct set_timings timings;
};
static const struct vc_image_format {
@@ -189,6 +238,7 @@ struct vc4_crtc {
u32 overscan[4];
bool vblank_enabled;
u32 display_number;
+ u32 display_type;
};
static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc)
@@ -198,6 +248,8 @@ static inline struct vc4_crtc *to_vc4_cr
struct vc4_fkms_encoder {
struct drm_encoder base;
+ bool hdmi_monitor;
+ bool rgb_range_selectable;
};
static inline struct vc4_fkms_encoder *
@@ -215,7 +267,9 @@ struct vc4_fkms_connector {
* hook.
*/
struct drm_encoder *encoder;
- u32 display_idx;
+ struct vc4_dev *vc4_dev;
+ u32 display_number;
+ u32 display_type;
};
static inline struct vc4_fkms_connector *
@@ -224,6 +278,26 @@ to_vc4_fkms_connector(struct drm_connect
return container_of(connector, struct vc4_fkms_connector, base);
}
+static u32 vc4_get_display_type(u32 display_number)
+{
+ const u32 display_types[] = {
+ /* The firmware display (DispmanX) IDs map to specific types in
+ * a fixed manner.
+ */
+ DRM_MODE_ENCODER_DSI, /* MAIN_LCD */
+ DRM_MODE_ENCODER_DSI, /* AUX_LCD */
+ DRM_MODE_ENCODER_TMDS, /* HDMI0 */
+ DRM_MODE_ENCODER_TVDAC, /* VEC */
+ DRM_MODE_ENCODER_NONE, /* FORCE_LCD */
+ DRM_MODE_ENCODER_NONE, /* FORCE_TV */
+ DRM_MODE_ENCODER_NONE, /* FORCE_OTHER */
+ DRM_MODE_ENCODER_TMDS, /* HDMI1 */
+ DRM_MODE_ENCODER_NONE, /* FORCE_TV2 */
+ };
+ return display_number > ARRAY_SIZE(display_types) - 1 ?
+ DRM_MODE_ENCODER_NONE : display_types[display_number];
+}
+
/* Firmware's structure for making an FB mbox call. */
struct fbinfo_s {
u32 xres, yres, xres_virtual, yres_virtual;
@@ -258,10 +332,15 @@ static int vc4_plane_set_blank(struct dr
.plane_id = vc4_plane->mb.plane.plane_id,
}
};
+ static const char * const plane_types[] = {
+ "overlay",
+ "primary",
+ "cursor"
+ };
int ret;
- DRM_DEBUG_ATOMIC("[PLANE:%d:%s] overlay plane %s",
- plane->base.id, plane->name,
+ DRM_DEBUG_ATOMIC("[PLANE:%d:%s] %s plane %s",
+ plane->base.id, plane->name, plane_types[plane->type],
blank ? "blank" : "unblank");
if (blank)
@@ -595,13 +674,102 @@ fail:
static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
- /* Everyting is handled in the planes. */
+ struct drm_device *dev = crtc->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ struct vc4_fkms_encoder *vc4_encoder =
+ to_vc4_fkms_encoder(vc4_crtc->encoder);
+ struct mailbox_set_mode mb = {
+ .tag1 = { RPI_FIRMWARE_SET_TIMING,
+ sizeof(struct set_timings), 0},
+ };
+ union hdmi_infoframe frame;
+ int ret;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, vc4_crtc->connector, mode);
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill AVI infoframe\n");
+ return;
+ }
+
+ DRM_DEBUG_KMS("Setting mode for display num %u mode name %s, clk %d, h(disp %d, start %d, end %d, total %d, skew %d) v(disp %d, start %d, end %d, total %d, scan %d), vrefresh %d, par %u\n",
+ vc4_crtc->display_number, mode->name, mode->clock,
+ mode->hdisplay, mode->hsync_start, mode->hsync_end,
+ mode->htotal, mode->hskew, mode->vdisplay,
+ mode->vsync_start, mode->vsync_end, mode->vtotal,
+ mode->vscan, mode->vrefresh, mode->picture_aspect_ratio);
+ mb.timings.display = vc4_crtc->display_number;
+
+ mb.timings.video_id_code = frame.avi.video_code;
+
+ mb.timings.clock = mode->clock;
+ mb.timings.hdisplay = mode->hdisplay;
+ mb.timings.hsync_start = mode->hsync_start;
+ mb.timings.hsync_end = mode->hsync_end;
+ mb.timings.htotal = mode->htotal;
+ mb.timings.hskew = mode->hskew;
+ mb.timings.vdisplay = mode->vdisplay;
+ mb.timings.vsync_start = mode->vsync_start;
+ mb.timings.vsync_end = mode->vsync_end;
+ mb.timings.vtotal = mode->vtotal;
+ mb.timings.vscan = mode->vscan;
+ mb.timings.vrefresh = 0;
+ mb.timings.flags = 0;
+ if (mode->flags & DRM_MODE_FLAG_PHSYNC)
+ mb.timings.flags |= TIMINGS_FLAGS_H_SYNC_POS;
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+ mb.timings.flags |= TIMINGS_FLAGS_V_SYNC_POS;
+
+ switch (frame.avi.picture_aspect) {
+ default:
+ case HDMI_PICTURE_ASPECT_NONE:
+ mode->flags |= TIMINGS_FLAGS_ASPECT_NONE;
+ break;
+ case HDMI_PICTURE_ASPECT_4_3:
+ mode->flags |= TIMINGS_FLAGS_ASPECT_4_3;
+ break;
+ case HDMI_PICTURE_ASPECT_16_9:
+ mode->flags |= TIMINGS_FLAGS_ASPECT_16_9;
+ break;
+ case HDMI_PICTURE_ASPECT_64_27:
+ mode->flags |= TIMINGS_FLAGS_ASPECT_64_27;
+ break;
+ case HDMI_PICTURE_ASPECT_256_135:
+ mode->flags |= TIMINGS_FLAGS_ASPECT_256_135;
+ break;
+ }
+
+ if (!vc4_encoder->hdmi_monitor)
+ mb.timings.flags |= TIMINGS_FLAGS_DVI;
+ else if (drm_default_rgb_quant_range(mode) ==
+ HDMI_QUANTIZATION_RANGE_LIMITED)
+ mb.timings.flags |= TIMINGS_FLAGS_RGB_LIMITED;
+
+ /*
+ FIXME: To implement
+ switch(mode->flag & DRM_MODE_FLAG_3D_MASK) {
+ case DRM_MODE_FLAG_3D_NONE:
+ case DRM_MODE_FLAG_3D_FRAME_PACKING:
+ case DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE:
+ case DRM_MODE_FLAG_3D_LINE_ALTERNATIVE:
+ case DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL:
+ case DRM_MODE_FLAG_3D_L_DEPTH:
+ case DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH:
+ case DRM_MODE_FLAG_3D_TOP_AND_BOTTOM:
+ case DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF:
+ }
+ */
+
+ ret = rpi_firmware_property_list(vc4->firmware, &mb, sizeof(mb));
}
static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
{
struct drm_plane *plane;
+ DRM_DEBUG_KMS("[CRTC:%d] vblanks off.\n",
+ crtc->base.id);
drm_crtc_vblank_off(crtc);
/* Always turn the planes off on CRTC disable. In DRM, planes
@@ -619,6 +787,8 @@ static void vc4_crtc_enable(struct drm_c
{
struct drm_plane *plane;
+ DRM_DEBUG_KMS("[CRTC:%d] vblanks on.\n",
+ crtc->base.id);
drm_crtc_vblank_on(crtc);
/* Unblank the planes (if they're supposed to be displayed). */
@@ -637,12 +807,20 @@ vc4_crtc_mode_valid(struct drm_crtc *crt
return MODE_NO_DBLESCAN;
}
+ /* Limit the pixel clock until we can get dynamic HDMI 2.0 scrambling
+ * working.
+ */
+ if (mode->clock > 340000)
+ return MODE_CLOCK_HIGH;
+
return MODE_OK;
}
static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
+ DRM_DEBUG_KMS("[CRTC:%d] crtc_atomic_check.\n",
+ crtc->base.id);
return 0;
}
@@ -652,6 +830,8 @@ static void vc4_crtc_atomic_flush(struct
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_device *dev = crtc->dev;
+ DRM_DEBUG_KMS("[CRTC:%d] crtc_atomic_flush.\n",
+ crtc->base.id);
if (crtc->state->event) {
unsigned long flags;
@@ -719,6 +899,8 @@ static int vc4_fkms_enable_vblank(struct
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ DRM_DEBUG_KMS("[CRTC:%d] enable_vblank.\n",
+ crtc->base.id);
vc4_crtc->vblank_enabled = true;
return 0;
@@ -728,6 +910,8 @@ static void vc4_fkms_disable_vblank(stru
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ DRM_DEBUG_KMS("[CRTC:%d] disable_vblank.\n",
+ crtc->base.id);
vc4_crtc->vblank_enabled = false;
}
@@ -762,36 +946,92 @@ static const struct of_device_id vc4_fir
static enum drm_connector_status
vc4_fkms_connector_detect(struct drm_connector *connector, bool force)
{
+ DRM_DEBUG_KMS("connector detect.\n");
return connector_status_connected;
}
-static int vc4_fkms_connector_get_modes(struct drm_connector *connector)
+static int vc4_fkms_get_edid_block(void *data, u8 *buf, unsigned int block,
+ size_t len)
{
- struct drm_device *dev = connector->dev;
struct vc4_fkms_connector *fkms_connector =
- to_vc4_fkms_connector(connector);
- struct vc4_dev *vc4 = to_vc4_dev(dev);
- struct drm_display_mode *mode;
- struct mailbox_get_width_height wh = {
- .tag1 = {RPI_FIRMWARE_FRAMEBUFFER_SET_DISPLAY_NUM, 4, 0, },
- .display = fkms_connector->display_idx,
- .tag2 = { RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT,
- 8, 0, },
+ (struct vc4_fkms_connector *)data;
+ struct vc4_dev *vc4 = fkms_connector->vc4_dev;
+ struct mailbox_get_edid mb = {
+ .tag1 = { RPI_FIRMWARE_GET_EDID_BLOCK_DISPLAY,
+ 128 + 8, 0 },
+ .block = block,
+ .display_number = fkms_connector->display_number,
};
- int ret;
+ int ret = 0;
+
+ ret = rpi_firmware_property_list(vc4->firmware, &mb, sizeof(mb));
+
+ if (!ret)
+ memcpy(buf, mb.edid, len);
+
+ return ret;
+}
+
+static int vc4_fkms_connector_get_modes(struct drm_connector *connector)
+{
+ struct vc4_fkms_connector *fkms_connector =
+ to_vc4_fkms_connector(connector);
+ struct drm_encoder *encoder = fkms_connector->encoder;
+ struct vc4_fkms_encoder *vc4_encoder = to_vc4_fkms_encoder(encoder);
+ int ret = 0;
+ struct edid *edid;
+
+ edid = drm_do_get_edid(connector, vc4_fkms_get_edid_block,
+ fkms_connector);
+
+ /* FIXME: Can we do CEC?
+ * cec_s_phys_addr_from_edid(vc4->hdmi->cec_adap, edid);
+ * if (!edid)
+ * return -ENODEV;
+ */
+
+ vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
- ret = rpi_firmware_property_list(vc4->firmware, &wh, sizeof(wh));
+ if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
+ vc4_encoder->rgb_range_selectable =
+ drm_rgb_quant_range_selectable(edid);
+ }
+
+ drm_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return ret;
+}
+
+/* FIXME: Read LCD mode from the firmware. This is the DSI panel resolution. */
+static const struct drm_display_mode lcd_mode = {
+ DRM_MODE("800x480", DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+ 25979400 / 1000,
+ 800, 800 + 1, 800 + 1 + 2, 800 + 1 + 2 + 46, 0,
+ 480, 480 + 7, 480 + 7 + 2, 480 + 7 + 2 + 21, 0,
+ DRM_MODE_FLAG_INTERLACE)
+};
+
+static int vc4_fkms_lcd_connector_get_modes(struct drm_connector *connector)
+{
+ //struct vc4_fkms_connector *fkms_connector =
+ // to_vc4_fkms_connector(connector);
+ //struct drm_encoder *encoder = fkms_connector->encoder;
+ //struct vc4_fkms_encoder *vc4_encoder = to_vc4_fkms_encoder(encoder);
+ struct drm_display_mode *mode;
+ //int ret = 0;
- if (ret) {
- DRM_ERROR("Failed to get screen size: %d (0x%08x 0x%08x)\n",
- ret, wh.wh[0], wh.wh[1]);
- return 0;
+ mode = drm_mode_duplicate(connector->dev,
+ &lcd_mode);
+ if (!mode) {
+ DRM_ERROR("Failed to create a new display mode\n");
+ return -ENOMEM;
}
- mode = drm_cvt_mode(dev, wh.wh[0], wh.wh[1], 60 /* vrefresh */,
- 0, 0, false);
drm_mode_probed_add(connector, mode);
+ /* We have one mode */
return 1;
}
@@ -800,11 +1040,14 @@ vc4_fkms_connector_best_encoder(struct d
{
struct vc4_fkms_connector *fkms_connector =
to_vc4_fkms_connector(connector);
+ DRM_DEBUG_KMS("best_connector.\n");
return fkms_connector->encoder;
}
static void vc4_fkms_connector_destroy(struct drm_connector *connector)
{
+ DRM_DEBUG_KMS("[CONNECTOR:%d] destroy.\n",
+ connector->base.id);
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
@@ -823,14 +1066,22 @@ static const struct drm_connector_helper
.best_encoder = vc4_fkms_connector_best_encoder,
};
+static const struct drm_connector_helper_funcs vc4_fkms_lcd_conn_helper_funcs = {
+ .get_modes = vc4_fkms_lcd_connector_get_modes,
+ .best_encoder = vc4_fkms_connector_best_encoder,
+};
+
static struct drm_connector *
vc4_fkms_connector_init(struct drm_device *dev, struct drm_encoder *encoder,
- u32 display_idx)
+ u32 display_num)
{
struct drm_connector *connector = NULL;
struct vc4_fkms_connector *fkms_connector;
+ struct vc4_dev *vc4_dev = to_vc4_dev(dev);
int ret = 0;
+ DRM_DEBUG_KMS("connector_init, display_num %u\n", display_num);
+
fkms_connector = devm_kzalloc(dev->dev, sizeof(*fkms_connector),
GFP_KERNEL);
if (!fkms_connector) {
@@ -840,11 +1091,21 @@ vc4_fkms_connector_init(struct drm_devic
connector = &fkms_connector->base;
fkms_connector->encoder = encoder;
- fkms_connector->display_idx = display_idx;
-
- drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
- DRM_MODE_CONNECTOR_HDMIA);
- drm_connector_helper_add(connector, &vc4_fkms_connector_helper_funcs);
+ fkms_connector->display_number = display_num;
+ fkms_connector->display_type = vc4_get_display_type(display_num);
+ fkms_connector->vc4_dev = vc4_dev;
+
+ if (fkms_connector->display_type == DRM_MODE_ENCODER_DSI) {
+ drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ drm_connector_helper_add(connector,
+ &vc4_fkms_lcd_conn_helper_funcs);
+ } else {
+ drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ drm_connector_helper_add(connector,
+ &vc4_fkms_connector_helper_funcs);
+ }
connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT);
@@ -865,6 +1126,7 @@ vc4_fkms_connector_init(struct drm_devic
static void vc4_fkms_encoder_destroy(struct drm_encoder *encoder)
{
+ DRM_DEBUG_KMS("Encoder_destroy\n");
drm_encoder_cleanup(encoder);
}
@@ -874,10 +1136,12 @@ static const struct drm_encoder_funcs vc
static void vc4_fkms_encoder_enable(struct drm_encoder *encoder)
{
+ DRM_DEBUG_KMS("Encoder_enable\n");
}
static void vc4_fkms_encoder_disable(struct drm_encoder *encoder)
{
+ DRM_DEBUG_KMS("Encoder_disable\n");
}
static const struct drm_encoder_helper_funcs vc4_fkms_encoder_helper_funcs = {
@@ -909,6 +1173,7 @@ static int vc4_fkms_create_screen(struct
crtc = &vc4_crtc->base;
vc4_crtc->display_number = display_ref;
+ vc4_crtc->display_type = vc4_get_display_type(display_ref);
/* Blank the firmware provided framebuffer */
rpi_firmware_property_list(vc4->firmware, &blank, sizeof(blank));
@@ -952,13 +1217,14 @@ static int vc4_fkms_create_screen(struct
return -ENOMEM;
vc4_crtc->encoder = &vc4_encoder->base;
vc4_encoder->base.possible_crtcs |= drm_crtc_mask(crtc) ;
+
drm_encoder_init(drm, &vc4_encoder->base, &vc4_fkms_encoder_funcs,
- DRM_MODE_ENCODER_TMDS, NULL);
+ vc4_crtc->display_type, NULL);
drm_encoder_helper_add(&vc4_encoder->base,
&vc4_fkms_encoder_helper_funcs);
vc4_crtc->connector = vc4_fkms_connector_init(drm, &vc4_encoder->base,
- display_idx);
+ display_ref);
if (IS_ERR(vc4_crtc->connector)) {
ret = PTR_ERR(vc4_crtc->connector);
goto err_destroy_encoder;
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -75,6 +75,7 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_GET_DISPMANX_RESOURCE_MEM_HANDLE = 0x00030014,
RPI_FIRMWARE_GET_EDID_BLOCK = 0x00030020,
RPI_FIRMWARE_GET_CUSTOMER_OTP = 0x00030021,
+ RPI_FIRMWARE_GET_EDID_BLOCK_DISPLAY = 0x00030023,
RPI_FIRMWARE_GET_DOMAIN_STATE = 0x00030030,
RPI_FIRMWARE_GET_THROTTLED = 0x00030046,
RPI_FIRMWARE_GET_CLOCK_MEASURED = 0x00030047,
@@ -149,6 +150,7 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_VCHIQ_INIT = 0x00048010,
RPI_FIRMWARE_SET_PLANE = 0x00048015,
+ RPI_FIRMWARE_SET_TIMING = 0x00048017,
RPI_FIRMWARE_GET_COMMAND_LINE = 0x00050001,
RPI_FIRMWARE_GET_DMA_CHANNELS = 0x00060001,
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