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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/ast/ast_main.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/ast/ast_main.c')
-rw-r--r-- | drivers/gpu/drm/ast/ast_main.c | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c new file mode 100644 index 0000000000..dae365ed39 --- /dev/null +++ b/drivers/gpu/drm/ast/ast_main.c @@ -0,0 +1,521 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: Dave Airlie <airlied@redhat.com> + */ + +#include <linux/pci.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_gem.h> +#include <drm/drm_managed.h> + +#include "ast_drv.h" + +static bool ast_is_vga_enabled(struct drm_device *dev) +{ + struct ast_device *ast = to_ast_device(dev); + u8 ch; + + ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT); + + return !!(ch & 0x01); +} + +static void ast_enable_vga(struct drm_device *dev) +{ + struct ast_device *ast = to_ast_device(dev); + + ast_io_write8(ast, AST_IO_VGA_ENABLE_PORT, 0x01); + ast_io_write8(ast, AST_IO_MISC_PORT_WRITE, 0x01); +} + +/* + * Run this function as part of the HW device cleanup; not + * when the DRM device gets released. + */ +static void ast_enable_mmio_release(void *data) +{ + struct ast_device *ast = data; + + /* enable standard VGA decode */ + ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04); +} + +static int ast_enable_mmio(struct ast_device *ast) +{ + struct drm_device *dev = &ast->base; + + ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06); + + return devm_add_action_or_reset(dev->dev, ast_enable_mmio_release, ast); +} + +static void ast_open_key(struct ast_device *ast) +{ + ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x80, 0xA8); +} + +static int ast_device_config_init(struct ast_device *ast) +{ + struct drm_device *dev = &ast->base; + struct pci_dev *pdev = to_pci_dev(dev->dev); + struct device_node *np = dev->dev->of_node; + uint32_t scu_rev = 0xffffffff; + u32 data; + u8 jregd0, jregd1; + + /* + * Find configuration mode and read SCU revision + */ + + ast->config_mode = ast_use_defaults; + + /* Check if we have device-tree properties */ + if (np && !of_property_read_u32(np, "aspeed,scu-revision-id", &data)) { + /* We do, disable P2A access */ + ast->config_mode = ast_use_dt; + scu_rev = data; + } else if (pdev->device == PCI_CHIP_AST2000) { // Not all families have a P2A bridge + /* + * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge + * is disabled. We force using P2A if VGA only mode bit + * is set D[7] + */ + jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); + jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); + if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) { + + /* + * We have a P2A bridge and it is enabled. + */ + + /* Patch AST2500/AST2510 */ + if ((pdev->revision & 0xf0) == 0x40) { + if (!(jregd0 & AST_VRAM_INIT_STATUS_MASK)) + ast_patch_ahb_2500(ast); + } + + /* Double check that it's actually working */ + data = ast_read32(ast, 0xf004); + if ((data != 0xffffffff) && (data != 0x00)) { + ast->config_mode = ast_use_p2a; + + /* Read SCU7c (silicon revision register) */ + ast_write32(ast, 0xf004, 0x1e6e0000); + ast_write32(ast, 0xf000, 0x1); + scu_rev = ast_read32(ast, 0x1207c); + } + } + } + + switch (ast->config_mode) { + case ast_use_defaults: + drm_info(dev, "Using default configuration\n"); + break; + case ast_use_dt: + drm_info(dev, "Using device-tree for configuration\n"); + break; + case ast_use_p2a: + drm_info(dev, "Using P2A bridge for configuration\n"); + break; + } + + /* + * Identify chipset + */ + + if (pdev->revision >= 0x50) { + ast->chip = AST2600; + drm_info(dev, "AST 2600 detected\n"); + } else if (pdev->revision >= 0x40) { + switch (scu_rev & 0x300) { + case 0x0100: + ast->chip = AST2510; + drm_info(dev, "AST 2510 detected\n"); + break; + default: + ast->chip = AST2500; + drm_info(dev, "AST 2500 detected\n"); + } + } else if (pdev->revision >= 0x30) { + switch (scu_rev & 0x300) { + case 0x0100: + ast->chip = AST1400; + drm_info(dev, "AST 1400 detected\n"); + break; + default: + ast->chip = AST2400; + drm_info(dev, "AST 2400 detected\n"); + } + } else if (pdev->revision >= 0x20) { + switch (scu_rev & 0x300) { + case 0x0000: + ast->chip = AST1300; + drm_info(dev, "AST 1300 detected\n"); + break; + default: + ast->chip = AST2300; + drm_info(dev, "AST 2300 detected\n"); + break; + } + } else if (pdev->revision >= 0x10) { + switch (scu_rev & 0x0300) { + case 0x0200: + ast->chip = AST1100; + drm_info(dev, "AST 1100 detected\n"); + break; + case 0x0100: + ast->chip = AST2200; + drm_info(dev, "AST 2200 detected\n"); + break; + case 0x0000: + ast->chip = AST2150; + drm_info(dev, "AST 2150 detected\n"); + break; + default: + ast->chip = AST2100; + drm_info(dev, "AST 2100 detected\n"); + break; + } + } else { + ast->chip = AST2000; + drm_info(dev, "AST 2000 detected\n"); + } + + return 0; +} + +static void ast_detect_widescreen(struct ast_device *ast) +{ + u8 jreg; + + /* Check if we support wide screen */ + switch (AST_GEN(ast)) { + case 1: + ast->support_wide_screen = false; + break; + default: + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); + if (!(jreg & 0x80)) + ast->support_wide_screen = true; + else if (jreg & 0x01) + ast->support_wide_screen = true; + else { + ast->support_wide_screen = false; + if (ast->chip == AST1300) + ast->support_wide_screen = true; + if (ast->chip == AST1400) + ast->support_wide_screen = true; + if (ast->chip == AST2510) + ast->support_wide_screen = true; + if (IS_AST_GEN7(ast)) + ast->support_wide_screen = true; + } + break; + } +} + +static void ast_detect_tx_chip(struct ast_device *ast, bool need_post) +{ + struct drm_device *dev = &ast->base; + u8 jreg; + + /* Check 3rd Tx option (digital output afaik) */ + ast->tx_chip_types |= AST_TX_NONE_BIT; + + /* + * VGACRA3 Enhanced Color Mode Register, check if DVO is already + * enabled, in that case, assume we have a SIL164 TMDS transmitter + * + * Don't make that assumption if we the chip wasn't enabled and + * is at power-on reset, otherwise we'll incorrectly "detect" a + * SIL164 when there is none. + */ + if (!need_post) { + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff); + if (jreg & 0x80) + ast->tx_chip_types = AST_TX_SIL164_BIT; + } + + if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) { + /* + * On AST GEN4+, look the configuration set by the SoC in + * the SOC scratch register #1 bits 11:8 (interestingly marked + * as "reserved" in the spec) + */ + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); + switch (jreg) { + case 0x04: + ast->tx_chip_types = AST_TX_SIL164_BIT; + break; + case 0x08: + ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL); + if (ast->dp501_fw_addr) { + /* backup firmware */ + if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) { + drmm_kfree(dev, ast->dp501_fw_addr); + ast->dp501_fw_addr = NULL; + } + } + fallthrough; + case 0x0c: + ast->tx_chip_types = AST_TX_DP501_BIT; + } + } else if (IS_AST_GEN7(ast)) { + if (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1, TX_TYPE_MASK) == + ASTDP_DPMCU_TX) { + ast->tx_chip_types = AST_TX_ASTDP_BIT; + ast_dp_launch(&ast->base); + } + } + + /* Print stuff for diagnostic purposes */ + if (ast->tx_chip_types & AST_TX_NONE_BIT) + drm_info(dev, "Using analog VGA\n"); + if (ast->tx_chip_types & AST_TX_SIL164_BIT) + drm_info(dev, "Using Sil164 TMDS transmitter\n"); + if (ast->tx_chip_types & AST_TX_DP501_BIT) + drm_info(dev, "Using DP501 DisplayPort transmitter\n"); + if (ast->tx_chip_types & AST_TX_ASTDP_BIT) + drm_info(dev, "Using ASPEED DisplayPort transmitter\n"); +} + +static int ast_get_dram_info(struct drm_device *dev) +{ + struct device_node *np = dev->dev->of_node; + struct ast_device *ast = to_ast_device(dev); + uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap; + uint32_t denum, num, div, ref_pll, dsel; + + switch (ast->config_mode) { + case ast_use_dt: + /* + * If some properties are missing, use reasonable + * defaults for GEN5 + */ + if (of_property_read_u32(np, "aspeed,mcr-configuration", + &mcr_cfg)) + mcr_cfg = 0x00000577; + if (of_property_read_u32(np, "aspeed,mcr-scu-mpll", + &mcr_scu_mpll)) + mcr_scu_mpll = 0x000050C0; + if (of_property_read_u32(np, "aspeed,mcr-scu-strap", + &mcr_scu_strap)) + mcr_scu_strap = 0; + break; + case ast_use_p2a: + ast_write32(ast, 0xf004, 0x1e6e0000); + ast_write32(ast, 0xf000, 0x1); + mcr_cfg = ast_read32(ast, 0x10004); + mcr_scu_mpll = ast_read32(ast, 0x10120); + mcr_scu_strap = ast_read32(ast, 0x10170); + break; + case ast_use_defaults: + default: + ast->dram_bus_width = 16; + ast->dram_type = AST_DRAM_1Gx16; + if (IS_AST_GEN6(ast)) + ast->mclk = 800; + else + ast->mclk = 396; + return 0; + } + + if (mcr_cfg & 0x40) + ast->dram_bus_width = 16; + else + ast->dram_bus_width = 32; + + if (IS_AST_GEN6(ast)) { + switch (mcr_cfg & 0x03) { + case 0: + ast->dram_type = AST_DRAM_1Gx16; + break; + default: + case 1: + ast->dram_type = AST_DRAM_2Gx16; + break; + case 2: + ast->dram_type = AST_DRAM_4Gx16; + break; + case 3: + ast->dram_type = AST_DRAM_8Gx16; + break; + } + } else if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast)) { + switch (mcr_cfg & 0x03) { + case 0: + ast->dram_type = AST_DRAM_512Mx16; + break; + default: + case 1: + ast->dram_type = AST_DRAM_1Gx16; + break; + case 2: + ast->dram_type = AST_DRAM_2Gx16; + break; + case 3: + ast->dram_type = AST_DRAM_4Gx16; + break; + } + } else { + switch (mcr_cfg & 0x0c) { + case 0: + case 4: + ast->dram_type = AST_DRAM_512Mx16; + break; + case 8: + if (mcr_cfg & 0x40) + ast->dram_type = AST_DRAM_1Gx16; + else + ast->dram_type = AST_DRAM_512Mx32; + break; + case 0xc: + ast->dram_type = AST_DRAM_1Gx32; + break; + } + } + + if (mcr_scu_strap & 0x2000) + ref_pll = 14318; + else + ref_pll = 12000; + + denum = mcr_scu_mpll & 0x1f; + num = (mcr_scu_mpll & 0x3fe0) >> 5; + dsel = (mcr_scu_mpll & 0xc000) >> 14; + switch (dsel) { + case 3: + div = 0x4; + break; + case 2: + case 1: + div = 0x2; + break; + default: + div = 0x1; + break; + } + ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000)); + return 0; +} + +struct ast_device *ast_device_create(const struct drm_driver *drv, + struct pci_dev *pdev, + unsigned long flags) +{ + struct drm_device *dev; + struct ast_device *ast; + bool need_post = false; + int ret = 0; + + ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base); + if (IS_ERR(ast)) + return ast; + dev = &ast->base; + + pci_set_drvdata(pdev, dev); + + ret = drmm_mutex_init(dev, &ast->ioregs_lock); + if (ret) + return ERR_PTR(ret); + + ast->regs = pcim_iomap(pdev, 1, 0); + if (!ast->regs) + return ERR_PTR(-EIO); + + /* + * After AST2500, MMIO is enabled by default, and it should be adopted + * to be compatible with Arm. + */ + if (pdev->revision >= 0x40) { + ast->ioregs = ast->regs + AST_IO_MM_OFFSET; + } else if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) { + drm_info(dev, "platform has no IO space, trying MMIO\n"); + ast->ioregs = ast->regs + AST_IO_MM_OFFSET; + } + + /* "map" IO regs if the above hasn't done so already */ + if (!ast->ioregs) { + ast->ioregs = pcim_iomap(pdev, 2, 0); + if (!ast->ioregs) + return ERR_PTR(-EIO); + } + + if (!ast_is_vga_enabled(dev)) { + drm_info(dev, "VGA not enabled on entry, requesting chip POST\n"); + need_post = true; + } + + /* + * If VGA isn't enabled, we need to enable now or subsequent + * access to the scratch registers will fail. + */ + if (need_post) + ast_enable_vga(dev); + + /* Enable extended register access */ + ast_open_key(ast); + ret = ast_enable_mmio(ast); + if (ret) + return ERR_PTR(ret); + + ret = ast_device_config_init(ast); + if (ret) + return ERR_PTR(ret); + + ast_detect_widescreen(ast); + ast_detect_tx_chip(ast, need_post); + + ret = ast_get_dram_info(dev); + if (ret) + return ERR_PTR(ret); + + drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n", + ast->mclk, ast->dram_type, ast->dram_bus_width); + + if (need_post) + ast_post_gpu(dev); + + ret = ast_mm_init(ast); + if (ret) + return ERR_PTR(ret); + + /* map reserved buffer */ + ast->dp501_fw_buf = NULL; + if (ast->vram_size < pci_resource_len(pdev, 0)) { + ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0); + if (!ast->dp501_fw_buf) + drm_info(dev, "failed to map reserved buffer!\n"); + } + + ret = ast_mode_config_init(ast); + if (ret) + return ERR_PTR(ret); + + return ast; +} |