diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0111-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0111-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch | 762 |
1 files changed, 762 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0111-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch b/target/linux/brcm2708/patches-4.19/950-0111-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch new file mode 100644 index 0000000000..270864f4d4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0111-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch @@ -0,0 +1,762 @@ +From cf4d9b0e5f081408edf3340b3f46171f5b56dbff Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Wed, 14 Sep 2016 08:39:33 +0100 +Subject: [PATCH 111/703] drm/vc4: Add a mode for using the closed firmware for + display. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/Makefile | 1 + + drivers/gpu/drm/vc4/vc4_crtc.c | 17 + + drivers/gpu/drm/vc4/vc4_drv.c | 1 + + drivers/gpu/drm/vc4/vc4_drv.h | 7 + + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 656 +++++++++++++++++++++++++ + 5 files changed, 682 insertions(+) + create mode 100644 drivers/gpu/drm/vc4/vc4_firmware_kms.c + +--- a/drivers/gpu/drm/vc4/Makefile ++++ b/drivers/gpu/drm/vc4/Makefile +@@ -9,6 +9,7 @@ vc4-y := \ + vc4_dpi.o \ + vc4_dsi.o \ + vc4_fence.o \ ++ vc4_firmware_kms.o \ + vc4_kms.o \ + vc4_gem.o \ + vc4_hdmi.o \ +--- a/drivers/gpu/drm/vc4/vc4_crtc.c ++++ b/drivers/gpu/drm/vc4/vc4_crtc.c +@@ -133,6 +133,9 @@ bool vc4_crtc_get_scanoutpos(struct drm_ + int vblank_lines; + bool ret = false; + ++ if (vc4->firmware_kms) ++ return 0; ++ + /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ + + /* Get optional system timestamp before query. */ +@@ -761,8 +764,15 @@ static void vc4_crtc_atomic_flush(struct + + static int vc4_enable_vblank(struct drm_crtc *crtc) + { ++ struct drm_device *dev = crtc->dev; ++ struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); + ++ if (vc4->firmware_kms) { ++ /* XXX: Can we mask the SMI interrupt? */ ++ return 0; ++ } ++ + CRTC_WRITE(PV_INTEN, PV_INT_VFP_START); + + return 0; +@@ -770,8 +780,15 @@ static int vc4_enable_vblank(struct drm_ + + static void vc4_disable_vblank(struct drm_crtc *crtc) + { ++ struct drm_device *dev = crtc->dev; ++ struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); + ++ if (vc4->firmware_kms) { ++ /* XXX: Can we mask the SMI interrupt? */ ++ return; ++ } ++ + CRTC_WRITE(PV_INTEN, 0); + } + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -347,6 +347,7 @@ static struct platform_driver *const com + &vc4_txp_driver, + &vc4_hvs_driver, + &vc4_crtc_driver, ++ &vc4_firmware_kms_driver, + &vc4_v3d_driver, + }; + +--- a/drivers/gpu/drm/vc4/vc4_drv.h ++++ b/drivers/gpu/drm/vc4/vc4_drv.h +@@ -67,6 +67,9 @@ struct vc4_perfmon { + struct vc4_dev { + struct drm_device *dev; + ++ bool firmware_kms; ++ struct rpi_firmware *firmware; ++ + struct vc4_hdmi *hdmi; + struct vc4_hvs *hvs; + struct vc4_v3d *v3d; +@@ -719,6 +722,10 @@ int vc4_dsi_debugfs_regs(struct seq_file + /* vc4_fence.c */ + extern const struct dma_fence_ops vc4_fence_ops; + ++/* vc4_firmware_kms.c */ ++extern struct platform_driver vc4_firmware_kms_driver; ++void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file); ++ + /* vc4_gem.c */ + void vc4_gem_init(struct drm_device *dev); + void vc4_gem_destroy(struct drm_device *dev); +--- /dev/null ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -0,0 +1,656 @@ ++/* ++ * Copyright (C) 2016 Broadcom ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++/** ++ * DOC: VC4 firmware KMS module. ++ * ++ * As a hack to get us from the current closed source driver world ++ * toward a totally open stack, implement KMS on top of the Raspberry ++ * Pi's firmware display stack. ++ */ ++ ++#include "drm/drm_atomic_helper.h" ++#include "drm/drm_plane_helper.h" ++#include "drm/drm_crtc_helper.h" ++#include "linux/clk.h" ++#include "linux/debugfs.h" ++#include "drm/drm_fb_cma_helper.h" ++#include "linux/component.h" ++#include "linux/of_device.h" ++#include "vc4_drv.h" ++#include "vc4_regs.h" ++#include <soc/bcm2835/raspberrypi-firmware.h> ++ ++/* The firmware delivers a vblank interrupt to us through the SMI ++ * hardware, which has only this one register. ++ */ ++#define SMICS 0x0 ++#define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11)) ++ ++struct vc4_crtc { ++ struct drm_crtc base; ++ struct drm_encoder *encoder; ++ struct drm_connector *connector; ++ void __iomem *regs; ++ ++ struct drm_pending_vblank_event *event; ++}; ++ ++static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc) ++{ ++ return container_of(crtc, struct vc4_crtc, base); ++} ++ ++struct vc4_fkms_encoder { ++ struct drm_encoder base; ++}; ++ ++static inline struct vc4_fkms_encoder * ++to_vc4_fkms_encoder(struct drm_encoder *encoder) ++{ ++ return container_of(encoder, struct vc4_fkms_encoder, base); ++} ++ ++/* VC4 FKMS connector KMS struct */ ++struct vc4_fkms_connector { ++ struct drm_connector base; ++ ++ /* Since the connector is attached to just the one encoder, ++ * this is the reference to it so we can do the best_encoder() ++ * hook. ++ */ ++ struct drm_encoder *encoder; ++}; ++ ++static inline struct vc4_fkms_connector * ++to_vc4_fkms_connector(struct drm_connector *connector) ++{ ++ return container_of(connector, struct vc4_fkms_connector, base); ++} ++ ++/* Firmware's structure for making an FB mbox call. */ ++struct fbinfo_s { ++ u32 xres, yres, xres_virtual, yres_virtual; ++ u32 pitch, bpp; ++ u32 xoffset, yoffset; ++ u32 base; ++ u32 screen_size; ++ u16 cmap[256]; ++}; ++ ++struct vc4_fkms_plane { ++ struct drm_plane base; ++ struct fbinfo_s *fbinfo; ++ dma_addr_t fbinfo_bus_addr; ++ u32 pitch; ++}; ++ ++static inline struct vc4_fkms_plane *to_vc4_fkms_plane(struct drm_plane *plane) ++{ ++ return (struct vc4_fkms_plane *)plane; ++} ++ ++/* Turns the display on/off. */ ++static int vc4_plane_set_primary_blank(struct drm_plane *plane, bool blank) ++{ ++ struct vc4_dev *vc4 = to_vc4_dev(plane->dev); ++ ++ u32 packet = blank; ++ return rpi_firmware_property(vc4->firmware, ++ RPI_FIRMWARE_FRAMEBUFFER_BLANK, ++ &packet, sizeof(packet)); ++} ++ ++static void vc4_primary_plane_atomic_update(struct drm_plane *plane, ++ struct drm_plane_state *old_state) ++{ ++ struct vc4_dev *vc4 = to_vc4_dev(plane->dev); ++ struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane); ++ struct drm_plane_state *state = plane->state; ++ struct drm_framebuffer *fb = state->fb; ++ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0); ++ volatile struct fbinfo_s *fbinfo = vc4_plane->fbinfo; ++ u32 bpp = 32; ++ int ret; ++ ++ vc4_plane_set_primary_blank(plane, false); ++ ++ fbinfo->xres = state->crtc_w; ++ fbinfo->yres = state->crtc_h; ++ fbinfo->xres_virtual = state->crtc_w; ++ fbinfo->yres_virtual = state->crtc_h; ++ fbinfo->bpp = bpp; ++ fbinfo->xoffset = state->crtc_x; ++ fbinfo->yoffset = state->crtc_y; ++ fbinfo->base = bo->paddr + fb->offsets[0]; ++ fbinfo->pitch = fb->pitches[0]; ++ /* A bug in the firmware makes it so that if the fb->base is ++ * set to nonzero, the configured pitch gets overwritten with ++ * the previous pitch. So, to get the configured pitch ++ * recomputed, we have to make it allocate itself a new buffer ++ * in VC memory, first. ++ */ ++ if (vc4_plane->pitch != fb->pitches[0]) { ++ u32 saved_base = fbinfo->base; ++ fbinfo->base = 0; ++ ++ ret = rpi_firmware_transaction(vc4->firmware, ++ RPI_FIRMWARE_CHAN_FB, ++ vc4_plane->fbinfo_bus_addr); ++ fbinfo->base = saved_base; ++ ++ vc4_plane->pitch = fbinfo->pitch; ++ WARN_ON_ONCE(vc4_plane->pitch != fb->pitches[0]); ++ } ++ ++ ret = rpi_firmware_transaction(vc4->firmware, ++ RPI_FIRMWARE_CHAN_FB, ++ vc4_plane->fbinfo_bus_addr); ++ WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]); ++ WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]); ++} ++ ++static void vc4_primary_plane_atomic_disable(struct drm_plane *plane, ++ struct drm_plane_state *old_state) ++{ ++ vc4_plane_set_primary_blank(plane, true); ++} ++ ++static void vc4_cursor_plane_atomic_update(struct drm_plane *plane, ++ struct drm_plane_state *old_state) ++{ ++ struct vc4_dev *vc4 = to_vc4_dev(plane->dev); ++ struct drm_plane_state *state = plane->state; ++ struct drm_framebuffer *fb = state->fb; ++ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0); ++ int ret; ++ u32 packet_state[] = { true, state->crtc_x, state->crtc_y, 0 }; ++ u32 packet_info[] = { state->crtc_w, state->crtc_h, ++ 0, /* unused */ ++ bo->paddr + fb->offsets[0], ++ 0, 0, /* hotx, hoty */}; ++ WARN_ON_ONCE(fb->pitches[0] != state->crtc_w * 4); ++ ++ ret = rpi_firmware_property(vc4->firmware, ++ RPI_FIRMWARE_SET_CURSOR_STATE, ++ &packet_state, ++ sizeof(packet_state)); ++ if (ret || packet_state[0] != 0) ++ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]); ++ ++ ret = rpi_firmware_property(vc4->firmware, ++ RPI_FIRMWARE_SET_CURSOR_INFO, ++ &packet_info, ++ sizeof(packet_info)); ++ if (ret || packet_info[0] != 0) ++ DRM_ERROR("Failed to set cursor info: 0x%08x\n", packet_info[0]); ++} ++ ++static void vc4_cursor_plane_atomic_disable(struct drm_plane *plane, ++ struct drm_plane_state *old_state) ++{ ++ struct vc4_dev *vc4 = to_vc4_dev(plane->dev); ++ u32 packet_state[] = { false, 0, 0, 0 }; ++ int ret; ++ ++ ret = rpi_firmware_property(vc4->firmware, ++ RPI_FIRMWARE_SET_CURSOR_STATE, ++ &packet_state, ++ sizeof(packet_state)); ++ if (ret || packet_state[0] != 0) ++ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]); ++} ++ ++static int vc4_plane_atomic_check(struct drm_plane *plane, ++ struct drm_plane_state *state) ++{ ++ return 0; ++} ++ ++static void vc4_plane_destroy(struct drm_plane *plane) ++{ ++ drm_plane_helper_disable(plane); ++ drm_plane_cleanup(plane); ++} ++ ++static const struct drm_plane_funcs vc4_plane_funcs = { ++ .update_plane = drm_atomic_helper_update_plane, ++ .disable_plane = drm_atomic_helper_disable_plane, ++ .destroy = vc4_plane_destroy, ++ .set_property = NULL, ++ .reset = drm_atomic_helper_plane_reset, ++ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, ++ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, ++}; ++ ++static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = { ++ .prepare_fb = NULL, ++ .cleanup_fb = NULL, ++ .atomic_check = vc4_plane_atomic_check, ++ .atomic_update = vc4_primary_plane_atomic_update, ++ .atomic_disable = vc4_primary_plane_atomic_disable, ++}; ++ ++static const struct drm_plane_helper_funcs vc4_cursor_plane_helper_funcs = { ++ .prepare_fb = NULL, ++ .cleanup_fb = NULL, ++ .atomic_check = vc4_plane_atomic_check, ++ .atomic_update = vc4_cursor_plane_atomic_update, ++ .atomic_disable = vc4_cursor_plane_atomic_disable, ++}; ++ ++static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev, ++ enum drm_plane_type type) ++{ ++ struct drm_plane *plane = NULL; ++ struct vc4_fkms_plane *vc4_plane; ++ u32 xrgb8888 = DRM_FORMAT_XRGB8888; ++ u32 argb8888 = DRM_FORMAT_ARGB8888; ++ int ret = 0; ++ bool primary = (type == DRM_PLANE_TYPE_PRIMARY); ++ ++ vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane), ++ GFP_KERNEL); ++ if (!vc4_plane) { ++ ret = -ENOMEM; ++ goto fail; ++ } ++ ++ plane = &vc4_plane->base; ++ ret = drm_universal_plane_init(dev, plane, 0xff, ++ &vc4_plane_funcs, ++ primary ? &xrgb8888 : &argb8888, 1, NULL, ++ type, NULL); ++ ++ if (type == DRM_PLANE_TYPE_PRIMARY) { ++ vc4_plane->fbinfo = ++ dma_alloc_coherent(dev->dev, ++ sizeof(*vc4_plane->fbinfo), ++ &vc4_plane->fbinfo_bus_addr, ++ GFP_KERNEL); ++ memset(vc4_plane->fbinfo, 0, sizeof(*vc4_plane->fbinfo)); ++ ++ drm_plane_helper_add(plane, &vc4_primary_plane_helper_funcs); ++ } else { ++ drm_plane_helper_add(plane, &vc4_cursor_plane_helper_funcs); ++ } ++ ++ return plane; ++fail: ++ if (plane) ++ vc4_plane_destroy(plane); ++ ++ return ERR_PTR(ret); ++} ++ ++static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) ++{ ++ /* Everyting is handled in the planes. */ ++} ++ ++static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state) ++{ ++} ++ ++static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state) ++{ ++} ++ ++static int vc4_crtc_atomic_check(struct drm_crtc *crtc, ++ struct drm_crtc_state *state) ++{ ++ return 0; ++} ++ ++static void vc4_crtc_atomic_flush(struct drm_crtc *crtc, ++ struct drm_crtc_state *old_state) ++{ ++} ++ ++static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc) ++{ ++ struct drm_crtc *crtc = &vc4_crtc->base; ++ struct drm_device *dev = crtc->dev; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&dev->event_lock, flags); ++ if (vc4_crtc->event) { ++ drm_crtc_send_vblank_event(crtc, vc4_crtc->event); ++ vc4_crtc->event = NULL; ++ drm_crtc_vblank_put(crtc); ++ } ++ spin_unlock_irqrestore(&dev->event_lock, flags); ++} ++ ++static irqreturn_t vc4_crtc_irq_handler(int irq, void *data) ++{ ++ struct vc4_crtc *vc4_crtc = data; ++ 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, ++ }, ++}; |