mirror of https://github.com/hak5/openwrt.git
763 lines
22 KiB
Diff
763 lines
22 KiB
Diff
From 9dc72ae3f8675264d4157793dd7053b8e09f3004 Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Wed, 14 Sep 2016 08:39:33 +0100
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Subject: [PATCH 110/454] drm/vc4: Add a mode for using the closed firmware for
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display.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/Makefile | 1 +
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drivers/gpu/drm/vc4/vc4_crtc.c | 17 +
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drivers/gpu/drm/vc4/vc4_drv.c | 1 +
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drivers/gpu/drm/vc4/vc4_drv.h | 7 +
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drivers/gpu/drm/vc4/vc4_firmware_kms.c | 656 +++++++++++++++++++++++++
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5 files changed, 682 insertions(+)
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create mode 100644 drivers/gpu/drm/vc4/vc4_firmware_kms.c
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--- a/drivers/gpu/drm/vc4/Makefile
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+++ b/drivers/gpu/drm/vc4/Makefile
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@@ -9,6 +9,7 @@ vc4-y := \
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vc4_dpi.o \
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vc4_dsi.o \
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vc4_fence.o \
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+ vc4_firmware_kms.o \
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vc4_kms.o \
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vc4_gem.o \
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vc4_hdmi.o \
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--- a/drivers/gpu/drm/vc4/vc4_crtc.c
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+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -164,6 +164,9 @@ bool vc4_crtc_get_scanoutpos(struct drm_
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int vblank_lines;
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bool ret = false;
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+ if (vc4->firmware_kms)
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+ return 0;
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+
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/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
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/* Get optional system timestamp before query. */
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@@ -682,8 +685,15 @@ static void vc4_crtc_atomic_flush(struct
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static int vc4_enable_vblank(struct drm_crtc *crtc)
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{
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+ struct drm_device *dev = crtc->dev;
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+ struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
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+ if (vc4->firmware_kms) {
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+ /* XXX: Can we mask the SMI interrupt? */
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+ return 0;
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+ }
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+
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CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
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return 0;
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@@ -691,8 +701,15 @@ static int vc4_enable_vblank(struct drm_
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static void vc4_disable_vblank(struct drm_crtc *crtc)
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{
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+ struct drm_device *dev = crtc->dev;
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+ struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
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+ if (vc4->firmware_kms) {
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+ /* XXX: Can we mask the SMI interrupt? */
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+ return;
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+ }
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+
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CRTC_WRITE(PV_INTEN, 0);
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}
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--- a/drivers/gpu/drm/vc4/vc4_drv.c
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+++ b/drivers/gpu/drm/vc4/vc4_drv.c
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@@ -317,6 +317,7 @@ static struct platform_driver *const com
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&vc4_dsi_driver,
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&vc4_hvs_driver,
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&vc4_crtc_driver,
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+ &vc4_firmware_kms_driver,
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&vc4_v3d_driver,
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};
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--- a/drivers/gpu/drm/vc4/vc4_drv.h
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+++ b/drivers/gpu/drm/vc4/vc4_drv.h
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@@ -32,6 +32,9 @@ enum vc4_kernel_bo_type {
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struct vc4_dev {
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struct drm_device *dev;
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+ bool firmware_kms;
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+ struct rpi_firmware *firmware;
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+
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struct vc4_hdmi *hdmi;
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struct vc4_hvs *hvs;
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struct vc4_v3d *v3d;
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@@ -539,6 +542,10 @@ int vc4_dsi_debugfs_regs(struct seq_file
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/* vc4_fence.c */
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extern const struct dma_fence_ops vc4_fence_ops;
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+/* vc4_firmware_kms.c */
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+extern struct platform_driver vc4_firmware_kms_driver;
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+void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
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+
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/* vc4_gem.c */
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void vc4_gem_init(struct drm_device *dev);
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void vc4_gem_destroy(struct drm_device *dev);
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--- /dev/null
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+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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@@ -0,0 +1,656 @@
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+/*
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+ * Copyright (C) 2016 Broadcom
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+/**
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+ * DOC: VC4 firmware KMS module.
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+ *
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+ * As a hack to get us from the current closed source driver world
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+ * toward a totally open stack, implement KMS on top of the Raspberry
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+ * Pi's firmware display stack.
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+ */
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+
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+#include "drm/drm_atomic_helper.h"
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+#include "drm/drm_plane_helper.h"
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+#include "drm/drm_crtc_helper.h"
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+#include "linux/clk.h"
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+#include "linux/debugfs.h"
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+#include "drm/drm_fb_cma_helper.h"
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+#include "linux/component.h"
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+#include "linux/of_device.h"
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+#include "vc4_drv.h"
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+#include "vc4_regs.h"
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+#include <soc/bcm2835/raspberrypi-firmware.h>
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+
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+/* The firmware delivers a vblank interrupt to us through the SMI
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+ * hardware, which has only this one register.
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+ */
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+#define SMICS 0x0
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+#define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11))
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+
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+struct vc4_crtc {
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+ struct drm_crtc base;
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+ struct drm_encoder *encoder;
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+ struct drm_connector *connector;
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+ void __iomem *regs;
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+
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+ struct drm_pending_vblank_event *event;
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+};
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+
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+static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc)
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+{
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+ return container_of(crtc, struct vc4_crtc, base);
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+}
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+
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+struct vc4_fkms_encoder {
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+ struct drm_encoder base;
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+};
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+
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+static inline struct vc4_fkms_encoder *
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+to_vc4_fkms_encoder(struct drm_encoder *encoder)
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+{
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+ return container_of(encoder, struct vc4_fkms_encoder, base);
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+}
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+
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+/* VC4 FKMS connector KMS struct */
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+struct vc4_fkms_connector {
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+ struct drm_connector base;
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+
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+ /* Since the connector is attached to just the one encoder,
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+ * this is the reference to it so we can do the best_encoder()
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+ * hook.
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+ */
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+ struct drm_encoder *encoder;
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+};
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+
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+static inline struct vc4_fkms_connector *
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+to_vc4_fkms_connector(struct drm_connector *connector)
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+{
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+ return container_of(connector, struct vc4_fkms_connector, base);
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+}
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+
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+/* Firmware's structure for making an FB mbox call. */
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+struct fbinfo_s {
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+ u32 xres, yres, xres_virtual, yres_virtual;
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+ u32 pitch, bpp;
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+ u32 xoffset, yoffset;
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+ u32 base;
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+ u32 screen_size;
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+ u16 cmap[256];
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+};
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+
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+struct vc4_fkms_plane {
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+ struct drm_plane base;
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+ struct fbinfo_s *fbinfo;
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+ dma_addr_t fbinfo_bus_addr;
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+ u32 pitch;
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+};
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+
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+static inline struct vc4_fkms_plane *to_vc4_fkms_plane(struct drm_plane *plane)
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+{
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+ return (struct vc4_fkms_plane *)plane;
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+}
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+
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+/* Turns the display on/off. */
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+static int vc4_plane_set_primary_blank(struct drm_plane *plane, bool blank)
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+{
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+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
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+
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+ u32 packet = blank;
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+ return rpi_firmware_property(vc4->firmware,
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+ RPI_FIRMWARE_FRAMEBUFFER_BLANK,
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+ &packet, sizeof(packet));
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+}
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+
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+static void vc4_primary_plane_atomic_update(struct drm_plane *plane,
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+ struct drm_plane_state *old_state)
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+{
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+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
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+ struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
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+ struct drm_plane_state *state = plane->state;
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+ struct drm_framebuffer *fb = state->fb;
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+ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
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+ volatile struct fbinfo_s *fbinfo = vc4_plane->fbinfo;
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+ u32 bpp = 32;
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+ int ret;
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+
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+ vc4_plane_set_primary_blank(plane, false);
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+
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+ fbinfo->xres = state->crtc_w;
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+ fbinfo->yres = state->crtc_h;
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+ fbinfo->xres_virtual = state->crtc_w;
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+ fbinfo->yres_virtual = state->crtc_h;
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+ fbinfo->bpp = bpp;
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+ fbinfo->xoffset = state->crtc_x;
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+ fbinfo->yoffset = state->crtc_y;
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+ fbinfo->base = bo->paddr + fb->offsets[0];
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+ fbinfo->pitch = fb->pitches[0];
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+ /* A bug in the firmware makes it so that if the fb->base is
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+ * set to nonzero, the configured pitch gets overwritten with
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+ * the previous pitch. So, to get the configured pitch
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+ * recomputed, we have to make it allocate itself a new buffer
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+ * in VC memory, first.
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+ */
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+ if (vc4_plane->pitch != fb->pitches[0]) {
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+ u32 saved_base = fbinfo->base;
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+ fbinfo->base = 0;
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+
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+ ret = rpi_firmware_transaction(vc4->firmware,
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+ RPI_FIRMWARE_CHAN_FB,
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+ vc4_plane->fbinfo_bus_addr);
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+ fbinfo->base = saved_base;
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+
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+ vc4_plane->pitch = fbinfo->pitch;
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+ WARN_ON_ONCE(vc4_plane->pitch != fb->pitches[0]);
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+ }
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+
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+ ret = rpi_firmware_transaction(vc4->firmware,
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+ RPI_FIRMWARE_CHAN_FB,
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+ vc4_plane->fbinfo_bus_addr);
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+ WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]);
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+ WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]);
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+}
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+
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+static void vc4_primary_plane_atomic_disable(struct drm_plane *plane,
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+ struct drm_plane_state *old_state)
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+{
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+ vc4_plane_set_primary_blank(plane, true);
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+}
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+
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+static void vc4_cursor_plane_atomic_update(struct drm_plane *plane,
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+ struct drm_plane_state *old_state)
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+{
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+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
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+ struct drm_plane_state *state = plane->state;
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+ struct drm_framebuffer *fb = state->fb;
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+ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
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+ int ret;
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+ u32 packet_state[] = { true, state->crtc_x, state->crtc_y, 0 };
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+ u32 packet_info[] = { state->crtc_w, state->crtc_h,
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+ 0, /* unused */
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+ bo->paddr + fb->offsets[0],
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+ 0, 0, /* hotx, hoty */};
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+ WARN_ON_ONCE(fb->pitches[0] != state->crtc_w * 4);
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+
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+ ret = rpi_firmware_property(vc4->firmware,
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+ RPI_FIRMWARE_SET_CURSOR_STATE,
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+ &packet_state,
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+ sizeof(packet_state));
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+ if (ret || packet_state[0] != 0)
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+ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
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+
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+ ret = rpi_firmware_property(vc4->firmware,
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+ RPI_FIRMWARE_SET_CURSOR_INFO,
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+ &packet_info,
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+ sizeof(packet_info));
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+ if (ret || packet_info[0] != 0)
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+ DRM_ERROR("Failed to set cursor info: 0x%08x\n", packet_info[0]);
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+}
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+
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+static void vc4_cursor_plane_atomic_disable(struct drm_plane *plane,
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+ struct drm_plane_state *old_state)
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+{
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+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
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+ u32 packet_state[] = { false, 0, 0, 0 };
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+ int ret;
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+
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+ ret = rpi_firmware_property(vc4->firmware,
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+ RPI_FIRMWARE_SET_CURSOR_STATE,
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+ &packet_state,
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+ sizeof(packet_state));
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+ if (ret || packet_state[0] != 0)
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+ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
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+}
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+
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+static int vc4_plane_atomic_check(struct drm_plane *plane,
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+ struct drm_plane_state *state)
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+{
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+ return 0;
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+}
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+
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+static void vc4_plane_destroy(struct drm_plane *plane)
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+{
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+ drm_plane_helper_disable(plane);
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+ drm_plane_cleanup(plane);
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+}
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+
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+static const struct drm_plane_funcs vc4_plane_funcs = {
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+ .update_plane = drm_atomic_helper_update_plane,
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+ .disable_plane = drm_atomic_helper_disable_plane,
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+ .destroy = vc4_plane_destroy,
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+ .set_property = NULL,
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+ .reset = drm_atomic_helper_plane_reset,
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+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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+};
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+
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+static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = {
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+ .prepare_fb = NULL,
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+ .cleanup_fb = NULL,
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+ .atomic_check = vc4_plane_atomic_check,
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+ .atomic_update = vc4_primary_plane_atomic_update,
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+ .atomic_disable = vc4_primary_plane_atomic_disable,
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+};
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+
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+static const struct drm_plane_helper_funcs vc4_cursor_plane_helper_funcs = {
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+ .prepare_fb = NULL,
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+ .cleanup_fb = NULL,
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+ .atomic_check = vc4_plane_atomic_check,
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+ .atomic_update = vc4_cursor_plane_atomic_update,
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+ .atomic_disable = vc4_cursor_plane_atomic_disable,
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+};
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+
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+static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
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+ enum drm_plane_type type)
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+{
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+ struct drm_plane *plane = NULL;
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+ struct vc4_fkms_plane *vc4_plane;
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+ u32 xrgb8888 = DRM_FORMAT_XRGB8888;
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+ u32 argb8888 = DRM_FORMAT_ARGB8888;
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+ int ret = 0;
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+ bool primary = (type == DRM_PLANE_TYPE_PRIMARY);
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+
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+ vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane),
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+ GFP_KERNEL);
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+ if (!vc4_plane) {
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+ ret = -ENOMEM;
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+ goto fail;
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+ }
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+
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+ plane = &vc4_plane->base;
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+ ret = drm_universal_plane_init(dev, plane, 0xff,
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+ &vc4_plane_funcs,
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+ primary ? &xrgb8888 : &argb8888, 1, NULL,
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+ type, NULL);
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+
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+ if (type == DRM_PLANE_TYPE_PRIMARY) {
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+ vc4_plane->fbinfo =
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+ dma_alloc_coherent(dev->dev,
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+ sizeof(*vc4_plane->fbinfo),
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+ &vc4_plane->fbinfo_bus_addr,
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+ GFP_KERNEL);
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+ memset(vc4_plane->fbinfo, 0, sizeof(*vc4_plane->fbinfo));
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+
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+ drm_plane_helper_add(plane, &vc4_primary_plane_helper_funcs);
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+ } else {
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+ drm_plane_helper_add(plane, &vc4_cursor_plane_helper_funcs);
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+ }
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+
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+ return plane;
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+fail:
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+ if (plane)
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+ vc4_plane_destroy(plane);
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+
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+ return ERR_PTR(ret);
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+}
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+
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+static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
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+{
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+ /* Everyting is handled in the planes. */
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+}
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+
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+static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
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+{
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+}
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+
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+static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
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+{
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+}
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+
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+static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
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+ struct drm_crtc_state *state)
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+{
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+ return 0;
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+}
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+
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+static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
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+ struct drm_crtc_state *old_state)
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+{
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+}
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+
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+static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
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+{
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+ struct drm_crtc *crtc = &vc4_crtc->base;
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+ struct drm_device *dev = crtc->dev;
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&dev->event_lock, flags);
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+ if (vc4_crtc->event) {
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+ drm_crtc_send_vblank_event(crtc, vc4_crtc->event);
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+ vc4_crtc->event = NULL;
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+ drm_crtc_vblank_put(crtc);
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+ }
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+ spin_unlock_irqrestore(&dev->event_lock, flags);
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+}
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+
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+static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
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+{
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+ struct vc4_crtc *vc4_crtc = data;
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+ u32 stat = readl(vc4_crtc->regs + SMICS);
|
|
+ irqreturn_t ret = IRQ_NONE;
|
|
+
|
|
+ if (stat & SMICS_INTERRUPTS) {
|
|
+ writel(0, vc4_crtc->regs + SMICS);
|
|
+ drm_crtc_handle_vblank(&vc4_crtc->base);
|
|
+ vc4_crtc_handle_page_flip(vc4_crtc);
|
|
+ ret = IRQ_HANDLED;
|
|
+ }
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int vc4_page_flip(struct drm_crtc *crtc,
|
|
+ struct drm_framebuffer *fb,
|
|
+ struct drm_pending_vblank_event *event,
|
|
+ uint32_t flags, struct drm_modeset_acquire_ctx *ctx)
|
|
+{
|
|
+ if (flags & DRM_MODE_PAGE_FLIP_ASYNC) {
|
|
+ DRM_ERROR("Async flips aren't allowed\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ return drm_atomic_helper_page_flip(crtc, fb, event, flags, ctx);
|
|
+}
|
|
+
|
|
+static const struct drm_crtc_funcs vc4_crtc_funcs = {
|
|
+ .set_config = drm_atomic_helper_set_config,
|
|
+ .destroy = drm_crtc_cleanup,
|
|
+ .page_flip = vc4_page_flip,
|
|
+ .set_property = NULL,
|
|
+ .cursor_set = NULL, /* handled by drm_mode_cursor_universal */
|
|
+ .cursor_move = NULL, /* handled by drm_mode_cursor_universal */
|
|
+ .reset = drm_atomic_helper_crtc_reset,
|
|
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
|
|
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
|
|
+};
|
|
+
|
|
+static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
|
|
+ .mode_set_nofb = vc4_crtc_mode_set_nofb,
|
|
+ .atomic_disable = vc4_crtc_disable,
|
|
+ .atomic_enable = vc4_crtc_enable,
|
|
+ .atomic_check = vc4_crtc_atomic_check,
|
|
+ .atomic_flush = vc4_crtc_atomic_flush,
|
|
+};
|
|
+
|
|
+/* Frees the page flip event when the DRM device is closed with the
|
|
+ * event still outstanding.
|
|
+ */
|
|
+void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
|
|
+{
|
|
+ struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
|
|
+ struct drm_device *dev = crtc->dev;
|
|
+ unsigned long flags;
|
|
+
|
|
+ spin_lock_irqsave(&dev->event_lock, flags);
|
|
+
|
|
+ if (vc4_crtc->event && vc4_crtc->event->base.file_priv == file) {
|
|
+ kfree(&vc4_crtc->event->base);
|
|
+ drm_crtc_vblank_put(crtc);
|
|
+ vc4_crtc->event = NULL;
|
|
+ }
|
|
+
|
|
+ spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
+}
|
|
+
|
|
+static const struct of_device_id vc4_firmware_kms_dt_match[] = {
|
|
+ { .compatible = "raspberrypi,rpi-firmware-kms" },
|
|
+ {}
|
|
+};
|
|
+
|
|
+static enum drm_connector_status
|
|
+vc4_fkms_connector_detect(struct drm_connector *connector, bool force)
|
|
+{
|
|
+ return connector_status_connected;
|
|
+}
|
|
+
|
|
+static int vc4_fkms_connector_get_modes(struct drm_connector *connector)
|
|
+{
|
|
+ struct drm_device *dev = connector->dev;
|
|
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
|
|
+ u32 wh[2] = {0, 0};
|
|
+ int ret;
|
|
+ struct drm_display_mode *mode;
|
|
+
|
|
+ ret = rpi_firmware_property(vc4->firmware,
|
|
+ RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT,
|
|
+ &wh, sizeof(wh));
|
|
+ if (ret) {
|
|
+ DRM_ERROR("Failed to get screen size: %d (0x%08x 0x%08x)\n",
|
|
+ ret, wh[0], wh[1]);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ mode = drm_cvt_mode(dev, wh[0], wh[1], 60 /* vrefresh */,
|
|
+ 0, 0, false);
|
|
+ drm_mode_probed_add(connector, mode);
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static struct drm_encoder *
|
|
+vc4_fkms_connector_best_encoder(struct drm_connector *connector)
|
|
+{
|
|
+ struct vc4_fkms_connector *fkms_connector =
|
|
+ to_vc4_fkms_connector(connector);
|
|
+ return fkms_connector->encoder;
|
|
+}
|
|
+
|
|
+static void vc4_fkms_connector_destroy(struct drm_connector *connector)
|
|
+{
|
|
+ drm_connector_unregister(connector);
|
|
+ drm_connector_cleanup(connector);
|
|
+}
|
|
+
|
|
+static const struct drm_connector_funcs vc4_fkms_connector_funcs = {
|
|
+ .detect = vc4_fkms_connector_detect,
|
|
+ .fill_modes = drm_helper_probe_single_connector_modes,
|
|
+ .destroy = vc4_fkms_connector_destroy,
|
|
+ .reset = drm_atomic_helper_connector_reset,
|
|
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
+};
|
|
+
|
|
+static const struct drm_connector_helper_funcs vc4_fkms_connector_helper_funcs = {
|
|
+ .get_modes = vc4_fkms_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)
|
|
+{
|
|
+ struct drm_connector *connector = NULL;
|
|
+ struct vc4_fkms_connector *fkms_connector;
|
|
+ int ret = 0;
|
|
+
|
|
+ fkms_connector = devm_kzalloc(dev->dev, sizeof(*fkms_connector),
|
|
+ GFP_KERNEL);
|
|
+ if (!fkms_connector) {
|
|
+ ret = -ENOMEM;
|
|
+ goto fail;
|
|
+ }
|
|
+ connector = &fkms_connector->base;
|
|
+
|
|
+ fkms_connector->encoder = encoder;
|
|
+
|
|
+ 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);
|
|
+
|
|
+ connector->interlace_allowed = 0;
|
|
+ connector->doublescan_allowed = 0;
|
|
+
|
|
+ drm_mode_connector_attach_encoder(connector, encoder);
|
|
+
|
|
+ return connector;
|
|
+
|
|
+ fail:
|
|
+ if (connector)
|
|
+ vc4_fkms_connector_destroy(connector);
|
|
+
|
|
+ return ERR_PTR(ret);
|
|
+}
|
|
+
|
|
+static void vc4_fkms_encoder_destroy(struct drm_encoder *encoder)
|
|
+{
|
|
+ drm_encoder_cleanup(encoder);
|
|
+}
|
|
+
|
|
+static const struct drm_encoder_funcs vc4_fkms_encoder_funcs = {
|
|
+ .destroy = vc4_fkms_encoder_destroy,
|
|
+};
|
|
+
|
|
+static void vc4_fkms_encoder_enable(struct drm_encoder *encoder)
|
|
+{
|
|
+}
|
|
+
|
|
+static void vc4_fkms_encoder_disable(struct drm_encoder *encoder)
|
|
+{
|
|
+}
|
|
+
|
|
+static const struct drm_encoder_helper_funcs vc4_fkms_encoder_helper_funcs = {
|
|
+ .enable = vc4_fkms_encoder_enable,
|
|
+ .disable = vc4_fkms_encoder_disable,
|
|
+};
|
|
+
|
|
+static int vc4_fkms_bind(struct device *dev, struct device *master, void *data)
|
|
+{
|
|
+ struct platform_device *pdev = to_platform_device(dev);
|
|
+ struct drm_device *drm = dev_get_drvdata(master);
|
|
+ struct vc4_dev *vc4 = to_vc4_dev(drm);
|
|
+ struct vc4_crtc *vc4_crtc;
|
|
+ struct vc4_fkms_encoder *vc4_encoder;
|
|
+ struct drm_crtc *crtc;
|
|
+ struct drm_plane *primary_plane, *cursor_plane, *destroy_plane, *temp;
|
|
+ struct device_node *firmware_node;
|
|
+ int ret;
|
|
+
|
|
+ vc4->firmware_kms = true;
|
|
+
|
|
+ vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
|
|
+ if (!vc4_crtc)
|
|
+ return -ENOMEM;
|
|
+ crtc = &vc4_crtc->base;
|
|
+
|
|
+ firmware_node = of_parse_phandle(dev->of_node, "brcm,firmware", 0);
|
|
+ vc4->firmware = rpi_firmware_get(firmware_node);
|
|
+ if (!vc4->firmware) {
|
|
+ DRM_DEBUG("Failed to get Raspberry Pi firmware reference.\n");
|
|
+ return -EPROBE_DEFER;
|
|
+ }
|
|
+ of_node_put(firmware_node);
|
|
+
|
|
+ /* Map the SMI interrupt reg */
|
|
+ vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
|
|
+ if (IS_ERR(vc4_crtc->regs))
|
|
+ return PTR_ERR(vc4_crtc->regs);
|
|
+
|
|
+ /* For now, we create just the primary and the legacy cursor
|
|
+ * planes. We should be able to stack more planes on easily,
|
|
+ * but to do that we would need to compute the bandwidth
|
|
+ * requirement of the plane configuration, and reject ones
|
|
+ * that will take too much.
|
|
+ */
|
|
+ primary_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
|
|
+ if (IS_ERR(primary_plane)) {
|
|
+ dev_err(dev, "failed to construct primary plane\n");
|
|
+ ret = PTR_ERR(primary_plane);
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ cursor_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
|
|
+ if (IS_ERR(cursor_plane)) {
|
|
+ dev_err(dev, "failed to construct cursor plane\n");
|
|
+ ret = PTR_ERR(cursor_plane);
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane,
|
|
+ &vc4_crtc_funcs, NULL);
|
|
+ drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
|
|
+ primary_plane->crtc = crtc;
|
|
+ cursor_plane->crtc = crtc;
|
|
+
|
|
+ vc4_encoder = devm_kzalloc(dev, sizeof(*vc4_encoder), GFP_KERNEL);
|
|
+ if (!vc4_encoder)
|
|
+ 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);
|
|
+ drm_encoder_helper_add(&vc4_encoder->base,
|
|
+ &vc4_fkms_encoder_helper_funcs);
|
|
+
|
|
+ vc4_crtc->connector = vc4_fkms_connector_init(drm, &vc4_encoder->base);
|
|
+ if (IS_ERR(vc4_crtc->connector)) {
|
|
+ ret = PTR_ERR(vc4_crtc->connector);
|
|
+ goto err_destroy_encoder;
|
|
+ }
|
|
+
|
|
+ writel(0, vc4_crtc->regs + SMICS);
|
|
+ ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
|
|
+ vc4_crtc_irq_handler, 0, "vc4 firmware kms",
|
|
+ vc4_crtc);
|
|
+ if (ret)
|
|
+ goto err_destroy_connector;
|
|
+
|
|
+ platform_set_drvdata(pdev, vc4_crtc);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_destroy_connector:
|
|
+ vc4_fkms_connector_destroy(vc4_crtc->connector);
|
|
+err_destroy_encoder:
|
|
+ vc4_fkms_encoder_destroy(vc4_crtc->encoder);
|
|
+ list_for_each_entry_safe(destroy_plane, temp,
|
|
+ &drm->mode_config.plane_list, head) {
|
|
+ if (destroy_plane->possible_crtcs == 1 << drm_crtc_index(crtc))
|
|
+ destroy_plane->funcs->destroy(destroy_plane);
|
|
+ }
|
|
+err:
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static void vc4_fkms_unbind(struct device *dev, struct device *master,
|
|
+ void *data)
|
|
+{
|
|
+ struct platform_device *pdev = to_platform_device(dev);
|
|
+ struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev);
|
|
+
|
|
+ vc4_fkms_connector_destroy(vc4_crtc->connector);
|
|
+ vc4_fkms_encoder_destroy(vc4_crtc->encoder);
|
|
+ drm_crtc_cleanup(&vc4_crtc->base);
|
|
+
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+}
|
|
+
|
|
+static const struct component_ops vc4_fkms_ops = {
|
|
+ .bind = vc4_fkms_bind,
|
|
+ .unbind = vc4_fkms_unbind,
|
|
+};
|
|
+
|
|
+static int vc4_fkms_probe(struct platform_device *pdev)
|
|
+{
|
|
+ return component_add(&pdev->dev, &vc4_fkms_ops);
|
|
+}
|
|
+
|
|
+static int vc4_fkms_remove(struct platform_device *pdev)
|
|
+{
|
|
+ component_del(&pdev->dev, &vc4_fkms_ops);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+struct platform_driver vc4_firmware_kms_driver = {
|
|
+ .probe = vc4_fkms_probe,
|
|
+ .remove = vc4_fkms_remove,
|
|
+ .driver = {
|
|
+ .name = "vc4_firmware_kms",
|
|
+ .of_match_table = vc4_firmware_kms_dt_match,
|
|
+ },
|
|
+};
|