From afeb3e11147adb357603b071d6d7d1f30ea7f19d Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Wed, 7 Apr 2010 13:55:09 +1000 Subject: [PATCH] drm/nouveau: attempt to get bios from ACPI v3 Some of the laptops with the switchable graphics, seem to not post the secondary GPU at all, and we can't find a copy of the BIOS anywhere except in the ACPI rom retrieval. This adds support for ACPI ROM retrieval to nouveau. Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_acpi.c | 59 +++++++++++++++++++++++++++++++++- drivers/gpu/drm/nouveau/nouveau_bios.c | 20 ++++++++++++ drivers/gpu/drm/nouveau/nouveau_drv.h | 5 +++ 3 files changed, 83 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index e13f6af..b3f146a 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -35,6 +35,7 @@ static struct nouveau_dsm_priv { bool dsm_detected; acpi_handle dhandle; acpi_handle dsm_handle; + acpi_handle rom_handle; } nouveau_dsm_priv; static const char nouveau_dsm_muid[] = { @@ -151,12 +152,13 @@ static bool nouveau_dsm_pci_probe(struct pci_dev *pdev) dhandle = DEVICE_ACPI_HANDLE(&pdev->dev); if (!dhandle) return false; + status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle); if (ACPI_FAILURE(status)) { return false; } - ret= nouveau_dsm(nvidia_handle, NOUVEAU_DSM_SUPPORTED, + ret = nouveau_dsm(nvidia_handle, NOUVEAU_DSM_SUPPORTED, NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result); if (ret < 0) return false; @@ -173,6 +175,7 @@ static bool nouveau_dsm_detect(void) struct pci_dev *pdev = NULL; int has_dsm = 0; int vga_count = 0; + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { vga_count++; @@ -204,3 +207,57 @@ void nouveau_unregister_dsm_handler(void) { vga_switcheroo_unregister_handler(); } + +/* retrieve the ROM in 4k blocks */ +static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios, + int offset, int len) +{ + acpi_status status; + union acpi_object rom_arg_elements[2], *obj; + struct acpi_object_list rom_arg; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; + + rom_arg.count = 2; + rom_arg.pointer = &rom_arg_elements[0]; + + rom_arg_elements[0].type = ACPI_TYPE_INTEGER; + rom_arg_elements[0].integer.value = offset; + + rom_arg_elements[1].type = ACPI_TYPE_INTEGER; + rom_arg_elements[1].integer.value = len; + + status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer); + if (ACPI_FAILURE(status)) { + printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status)); + return -ENODEV; + } + obj = (union acpi_object *)buffer.pointer; + memcpy(bios+offset, obj->buffer.pointer, len); + kfree(buffer.pointer); + return len; +} + +bool nouveau_acpi_rom_supported(struct pci_dev *pdev) +{ + acpi_status status; + acpi_handle dhandle, rom_handle; + + if (!nouveau_dsm_priv.dsm_detected) + return false; + + dhandle = DEVICE_ACPI_HANDLE(&pdev->dev); + if (!dhandle) + return false; + + status = acpi_get_handle(dhandle, "_ROM", &rom_handle); + if (ACPI_FAILURE(status)) + return false; + + nouveau_dsm_priv.rom_handle = rom_handle; + return true; +} + +int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) +{ + return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len); +} diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index e7e69cc..745ff37 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -178,6 +178,25 @@ out: pci_disable_rom(dev->pdev); } +static void load_vbios_acpi(struct drm_device *dev, uint8_t *data) +{ + int i; + int ret; + int size = 64 * 1024; + + if (!nouveau_acpi_rom_supported(dev->pdev)) + return; + + for (i = 0; i < (size / ROM_BIOS_PAGE); i++) { + ret = nouveau_acpi_get_bios_chunk(data, + (i * ROM_BIOS_PAGE), + ROM_BIOS_PAGE); + if (ret <= 0) + break; + } + return; +} + struct methods { const char desc[8]; void (*loadbios)(struct drm_device *, uint8_t *); @@ -191,6 +210,7 @@ static struct methods nv04_methods[] = { }; static struct methods nv50_methods[] = { + { "ACPI", load_vbios_acpi, true }, { "PRAMIN", load_vbios_pramin, true }, { "PROM", load_vbios_prom, false }, { "PCIROM", load_vbios_pci, true }, diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 5b13443..c697191 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -851,12 +851,17 @@ extern int nouveau_dma_init(struct nouveau_channel *); extern int nouveau_dma_wait(struct nouveau_channel *, int slots, int size); /* nouveau_acpi.c */ +#define ROM_BIOS_PAGE 4096 #if defined(CONFIG_ACPI) void nouveau_register_dsm_handler(void); void nouveau_unregister_dsm_handler(void); +int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len); +bool nouveau_acpi_rom_supported(struct pci_dev *pdev); #else static inline void nouveau_register_dsm_handler(void) {} static inline void nouveau_unregister_dsm_handler(void) {} +static inline bool nouveau_acpi_rom_supported(struct pci_dev *pdev) { return false; } +static inline int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) { return -EINVAL; } #endif /* nouveau_backlight.c */ -- 1.8.2.3