bcm27xx: sync 5.4 patches with RPi Foundation

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 138 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0252-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch b/target/linux/bcm27xx/patches-5.4/950-0252-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch
new file mode 100644
index 0000000000..a917540869
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0252-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch
@@ -0,0 +1,138 @@
+From e8f126acd6da4f7d2e0df3c735fccf9971d95254 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 21 May 2019 11:50:00 +0100
+Subject: [PATCH] drm: vc4: Probe DPI/DSI timings from the firmware
+
+For DPI and DSI displays query the firmware as to the configuration
+and add it as the only mode for DRM.
+
+In theory we can add plumbing for setting the DPI/DSI mode from
+KMS, but this is not being added at present as the support frameworks
+aren't present in the firmware.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c     | 64 ++++++++++++++++------
+ include/soc/bcm2835/raspberrypi-firmware.h |  1 +
+ 2 files changed, 49 insertions(+), 16 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -248,7 +248,6 @@ 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 *
+@@ -283,7 +282,7 @@ static u32 vc4_get_display_type(u32 disp
+ 		/* The firmware display (DispmanX) IDs map to specific types in
+ 		 * a fixed manner.
+ 		 */
+-		DRM_MODE_ENCODER_DSI,	/* MAIN_LCD */
++		DRM_MODE_ENCODER_DSI,	/* MAIN_LCD - DSI or DPI */
+ 		DRM_MODE_ENCODER_DSI,	/* AUX_LCD */
+ 		DRM_MODE_ENCODER_TMDS,	/* HDMI0 */
+ 		DRM_MODE_ENCODER_TVDAC,	/* VEC */
+@@ -365,7 +364,6 @@ static void vc4_plane_atomic_update(stru
+ 					vc4_get_vc_image_fmt(drm_fmt->format);
+ 	struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
+ 	struct mailbox_set_plane *mb = &vc4_plane->mb;
+-	struct vc4_crtc *vc4_crtc = to_vc4_crtc(state->crtc);
+ 	int num_planes = fb->format->num_planes;
+ 	struct drm_display_mode *mode = &state->crtc->mode;
+ 	unsigned int rotation = SUPPORTED_ROTATIONS;
+@@ -987,11 +985,6 @@ static int vc4_fkms_connector_get_modes(
+ 
+ 	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_connector_update_edid_property(connector, edid);
+ 	ret = drm_add_edid_modes(connector, edid);
+ 	kfree(edid);
+@@ -999,7 +992,9 @@ static int vc4_fkms_connector_get_modes(
+ 	return ret;
+ }
+ 
+-/* FIXME: Read LCD mode from the firmware. This is the DSI panel resolution. */
++/* This is the DSI panel resolution. Use this as a default should the firmware
++ * not respond to our request for the timings.
++ */
+ static const struct drm_display_mode lcd_mode = {
+ 	DRM_MODE("800x480", DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+ 		 25979400 / 1000,
+@@ -1010,15 +1005,52 @@ static const struct drm_display_mode lcd
+ 
+ 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 vc4_fkms_connector *fkms_connector =
++					to_vc4_fkms_connector(connector);
++	struct vc4_dev *vc4 = fkms_connector->vc4_dev;
+ 	struct drm_display_mode *mode;
+-	//int ret = 0;
++	struct mailbox_set_mode mb = {
++		.tag1 = { RPI_FIRMWARE_GET_DISPLAY_TIMING,
++			  sizeof(struct set_timings), 0},
++		.timings = { .display = fkms_connector->display_number },
++	};
++	struct drm_display_mode fw_mode;
++	int ret = 0;
++
++	ret = rpi_firmware_property_list(vc4->firmware, &mb, sizeof(mb));
++	if (!ret) {
++		/* Equivalent to DRM_MODE macro. */
++		memset(&fw_mode, 0, sizeof(fw_mode));
++		strncpy(fw_mode.name, "LCD_MODE", sizeof(fw_mode.name));
++		fw_mode.status = 0;
++		fw_mode.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
++		fw_mode.clock = mb.timings.clock;
++		fw_mode.hdisplay = mb.timings.hdisplay;
++		fw_mode.hsync_start = mb.timings.hsync_start;
++		fw_mode.hsync_end = mb.timings.hsync_end;
++		fw_mode.htotal = mb.timings.htotal;
++		fw_mode.hskew = 0;
++		fw_mode.vdisplay = mb.timings.vdisplay;
++		fw_mode.vsync_start = mb.timings.vsync_start;
++		fw_mode.vsync_end = mb.timings.vsync_end;
++		fw_mode.vtotal = mb.timings.vtotal;
++		fw_mode.vscan = mb.timings.vscan;
++		if (mb.timings.flags & TIMINGS_FLAGS_H_SYNC_POS)
++			fw_mode.flags |= DRM_MODE_FLAG_PHSYNC;
++		else
++			fw_mode.flags |= DRM_MODE_FLAG_NHSYNC;
++		if (mb.timings.flags & TIMINGS_FLAGS_V_SYNC_POS)
++			fw_mode.flags |= DRM_MODE_FLAG_PVSYNC;
++		else
++			fw_mode.flags |= DRM_MODE_FLAG_NVSYNC;
++
++		mode = drm_mode_duplicate(connector->dev,
++					  &fw_mode);
++	} else {
++		mode = drm_mode_duplicate(connector->dev,
++					  &lcd_mode);
++	}
+ 
+-	mode = drm_mode_duplicate(connector->dev,
+-				  &lcd_mode);
+ 	if (!mode) {
+ 		DRM_ERROR("Failed to create a new display mode\n");
+ 		return -ENOMEM;
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -150,6 +150,7 @@ enum rpi_firmware_property_tag {
+ 	RPI_FIRMWARE_VCHIQ_INIT =                             0x00048010,
+ 
+ 	RPI_FIRMWARE_SET_PLANE =                              0x00048015,
++	RPI_FIRMWARE_GET_DISPLAY_TIMING =                     0x00040017,
+ 	RPI_FIRMWARE_SET_TIMING =                             0x00048017,
+ 
+ 	RPI_FIRMWARE_GET_COMMAND_LINE =                       0x00050001,