bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

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

1 files changed, 134 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0253-drm-vc4-fkms-to-query-the-VPU-for-HDMI-clock-limits.patch b/target/linux/bcm27xx/patches-5.4/950-0253-drm-vc4-fkms-to-query-the-VPU-for-HDMI-clock-limits.patch
new file mode 100644
index 0000000000..186a7c891f
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0253-drm-vc4-fkms-to-query-the-VPU-for-HDMI-clock-limits.patch
@@ -0,0 +1,134 @@
+From 1a8e3d8e883b9f9b18dff052a9294d4354994992 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Thu, 30 May 2019 13:56:15 +0100
+Subject: [PATCH] drm/vc4: fkms to query the VPU for HDMI clock limits
+
+The VPU has configured clocks for 4k (or not) via config.txt,
+and will limit the choice of video modes based on that.
+Make fkms query it for these limits too to avoid selecting modes
+that can not be handled by the current clock setup.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_drv.h              |  1 +
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c     | 48 ++++++++++++++++++++++
+ include/soc/bcm2835/raspberrypi-firmware.h |  1 +
+ 3 files changed, 50 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_drv.h
++++ b/drivers/gpu/drm/vc4/vc4_drv.h
+@@ -81,6 +81,7 @@ struct vc4_dev {
+ 	struct vc4_dsi *dsi1;
+ 	struct vc4_vec *vec;
+ 	struct vc4_txp *txp;
++	struct vc4_fkms *fkms;
+ 
+ 	struct vc4_hang_state *hang_state;
+ 
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -32,6 +32,14 @@
+ #include "vc_image_types.h"
+ #include <soc/bcm2835/raspberrypi-firmware.h>
+ 
++struct get_display_cfg {
++	u32  max_pixel_clock[2];  //Max pixel clock for each display
++};
++
++struct vc4_fkms {
++	struct get_display_cfg cfg;
++};
++
+ #define PLANES_PER_CRTC		3
+ 
+ struct set_plane {
+@@ -795,6 +803,11 @@ static void vc4_crtc_enable(struct drm_c
+ static enum drm_mode_status
+ vc4_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
+ {
++	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
++	struct drm_device *dev = crtc->dev;
++	struct vc4_dev *vc4 = to_vc4_dev(dev);
++	struct vc4_fkms *fkms = vc4->fkms;
++
+ 	/* Do not allow doublescan modes from user space */
+ 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
+ 		DRM_DEBUG_KMS("[CRTC:%d] Doublescan mode rejected.\n",
+@@ -802,6 +815,22 @@ vc4_crtc_mode_valid(struct drm_crtc *crt
+ 		return MODE_NO_DBLESCAN;
+ 	}
+ 
++	/* Limit the pixel clock based on the HDMI clock limits from the
++	 * firmware
++	 */
++	switch (vc4_crtc->display_number) {
++	case 2:	/* HDMI0 */
++		if (fkms->cfg.max_pixel_clock[0] &&
++		    mode->clock > fkms->cfg.max_pixel_clock[0])
++			return MODE_CLOCK_HIGH;
++		break;
++	case 7:	/* HDMI1 */
++		if (fkms->cfg.max_pixel_clock[1] &&
++		    mode->clock > fkms->cfg.max_pixel_clock[1])
++			return MODE_CLOCK_HIGH;
++		break;
++	}
++
+ 	/* Limit the pixel clock until we can get dynamic HDMI 2.0 scrambling
+ 	 * working.
+ 	 */
+@@ -1295,11 +1324,16 @@ static int vc4_fkms_bind(struct device *
+ 	struct device_node *firmware_node;
+ 	struct vc4_crtc **crtc_list;
+ 	u32 num_displays, display_num;
++	struct vc4_fkms *fkms;
+ 	int ret;
+ 	u32 display_id;
+ 
+ 	vc4->firmware_kms = true;
+ 
++	fkms = devm_kzalloc(dev, sizeof(*fkms), GFP_KERNEL);
++	if (!fkms)
++		return -ENOMEM;
++
+ 	/* firmware kms doesn't have precise a scanoutpos implementation, so
+ 	 * we can't do the precise vblank timestamp mode.
+ 	 */
+@@ -1328,6 +1362,18 @@ static int vc4_fkms_bind(struct device *
+ 		ret = 0;
+ 	}
+ 
++	ret = rpi_firmware_property(vc4->firmware,
++				    RPI_FIRMWARE_GET_DISPLAY_CFG,
++				    &fkms->cfg, sizeof(fkms->cfg));
++
++	if (ret)
++		return -EINVAL;
++	/* The firmware works in Hz. This will be compared against kHz, so div
++	 * 1000 now rather than multiple times later.
++	 */
++	fkms->cfg.max_pixel_clock[0] /= 1000;
++	fkms->cfg.max_pixel_clock[1] /= 1000;
++
+ 	/* Allocate a list, with space for a NULL on the end */
+ 	crtc_list = devm_kzalloc(dev, sizeof(crtc_list) * (num_displays + 1),
+ 				 GFP_KERNEL);
+@@ -1369,6 +1415,8 @@ static int vc4_fkms_bind(struct device *
+ 		DRM_WARN("No displays found. Consider forcing hotplug if HDMI is attached\n");
+ 	}
+ 
++	vc4->fkms = fkms;
++
+ 	platform_set_drvdata(pdev, crtc_list);
+ 
+ 	return 0;
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -152,6 +152,7 @@ enum rpi_firmware_property_tag {
+ 	RPI_FIRMWARE_SET_PLANE =                              0x00048015,
+ 	RPI_FIRMWARE_GET_DISPLAY_TIMING =                     0x00040017,
+ 	RPI_FIRMWARE_SET_TIMING =                             0x00048017,
++	RPI_FIRMWARE_GET_DISPLAY_CFG =                        0x00040018,
+ 
+ 	RPI_FIRMWARE_GET_COMMAND_LINE =                       0x00050001,
+ 	RPI_FIRMWARE_GET_DMA_CHANNELS =                       0x00060001,