bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 95 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0427-drm-vc4-Add-all-the-HDMI-registers-into-the-debugfs-.patch b/target/linux/bcm27xx/patches-5.15/950-0427-drm-vc4-Add-all-the-HDMI-registers-into-the-debugfs-.patch
new file mode 100644
index 0000000000..feedea8f43
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0427-drm-vc4-Add-all-the-HDMI-registers-into-the-debugfs-.patch
@@ -0,0 +1,95 @@
+From b6d1141860db42137660a44a8c1713a33e6e5833 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Wed, 21 Oct 2020 18:34:56 +0100
+Subject: [PATCH] drm/vc4: Add all the HDMI registers into the debugfs
+ dumps
+
+The vc5 HDMI registers hadn't been added into the debugfs
+register sets, therefore weren't dumped on request.
+Add them in.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 39 ++++++++++++++++++++++++++++++++++
+ drivers/gpu/drm/vc4/vc4_hdmi.h |  8 +++++++
+ 2 files changed, 47 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -112,6 +112,12 @@ static int vc4_hdmi_debugfs_regs(struct
+ 
+ 	drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
+ 	drm_print_regset32(&p, &vc4_hdmi->hd_regset);
++	drm_print_regset32(&p, &vc4_hdmi->cec_regset);
++	drm_print_regset32(&p, &vc4_hdmi->csc_regset);
++	drm_print_regset32(&p, &vc4_hdmi->dvp_regset);
++	drm_print_regset32(&p, &vc4_hdmi->phy_regset);
++	drm_print_regset32(&p, &vc4_hdmi->ram_regset);
++	drm_print_regset32(&p, &vc4_hdmi->rm_regset);
+ 
+ 	return 0;
+ }
+@@ -2361,6 +2367,7 @@ static int vc5_hdmi_init_resources(struc
+ 	struct platform_device *pdev = vc4_hdmi->pdev;
+ 	struct device *dev = &pdev->dev;
+ 	struct resource *res;
++	int ret;
+ 
+ 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi");
+ 	if (!res)
+@@ -2457,6 +2464,38 @@ static int vc5_hdmi_init_resources(struc
+ 		return PTR_ERR(vc4_hdmi->reset);
+ 	}
+ 
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hdmi_regset, VC4_HDMI);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hd_regset, VC4_HD);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->cec_regset, VC5_CEC);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->csc_regset, VC5_CSC);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->dvp_regset, VC5_DVP);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->phy_regset, VC5_PHY);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->ram_regset, VC5_RAM);
++	if (ret)
++		return ret;
++
++	ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->rm_regset, VC5_RM);
++	if (ret)
++		return ret;
++
+ 	return 0;
+ }
+ 
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
+@@ -216,6 +216,14 @@ struct vc4_hdmi {
+ 	 * the scrambler on? Protected by @mutex.
+ 	 */
+ 	bool scdc_enabled;
++
++	/* VC5 debugfs regset */
++	struct debugfs_regset32 cec_regset;
++	struct debugfs_regset32 csc_regset;
++	struct debugfs_regset32 dvp_regset;
++	struct debugfs_regset32 phy_regset;
++	struct debugfs_regset32 ram_regset;
++	struct debugfs_regset32 rm_regset;
+ };
+ 
+ static inline struct vc4_hdmi *