// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2010 Matt Turner. * Copyright 2012 Red Hat * * Authors: Matthew Garrett * Matt Turner * Dave Airlie */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mgag200_drv.h" #define MGAG200_LUT_SIZE 256 /* * This file contains setup code for the CRTC. */ static void mgag200_crtc_set_gamma_linear(struct mga_device *mdev, const struct drm_format_info *format) { int i; WREG8(DAC_INDEX + MGA1064_INDEX, 0); switch (format->format) { case DRM_FORMAT_RGB565: /* Use better interpolation, to take 32 values from 0 to 255 */ for (i = 0; i < MGAG200_LUT_SIZE / 8; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, i * 8 + i / 4); WREG8(DAC_INDEX + MGA1064_COL_PAL, i * 4 + i / 16); WREG8(DAC_INDEX + MGA1064_COL_PAL, i * 8 + i / 4); } /* Green has one more bit, so add padding with 0 for red and blue. */ for (i = MGAG200_LUT_SIZE / 8; i < MGAG200_LUT_SIZE / 4; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, 0); WREG8(DAC_INDEX + MGA1064_COL_PAL, i * 4 + i / 16); WREG8(DAC_INDEX + MGA1064_COL_PAL, 0); } break; case DRM_FORMAT_RGB888: case DRM_FORMAT_XRGB8888: for (i = 0; i < MGAG200_LUT_SIZE; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, i); WREG8(DAC_INDEX + MGA1064_COL_PAL, i); WREG8(DAC_INDEX + MGA1064_COL_PAL, i); } break; default: drm_warn_once(&mdev->base, "Unsupported format %p4cc for gamma correction\n", &format->format); break; } } static void mgag200_crtc_set_gamma(struct mga_device *mdev, const struct drm_format_info *format, struct drm_color_lut *lut) { int i; WREG8(DAC_INDEX + MGA1064_INDEX, 0); switch (format->format) { case DRM_FORMAT_RGB565: /* Use better interpolation, to take 32 values from lut[0] to lut[255] */ for (i = 0; i < MGAG200_LUT_SIZE / 8; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i * 8 + i / 4].red >> 8); WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i * 4 + i / 16].green >> 8); WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i * 8 + i / 4].blue >> 8); } /* Green has one more bit, so add padding with 0 for red and blue. */ for (i = MGAG200_LUT_SIZE / 8; i < MGAG200_LUT_SIZE / 4; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, 0); WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i * 4 + i / 16].green >> 8); WREG8(DAC_INDEX + MGA1064_COL_PAL, 0); } break; case DRM_FORMAT_RGB888: case DRM_FORMAT_XRGB8888: for (i = 0; i < MGAG200_LUT_SIZE; i++) { WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i].red >> 8); WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i].green >> 8); WREG8(DAC_INDEX + MGA1064_COL_PAL, lut[i].blue >> 8); } break; default: drm_warn_once(&mdev->base, "Unsupported format %p4cc for gamma correction\n", &format->format); break; } } static inline void mga_wait_vsync(struct mga_device *mdev) { unsigned long timeout = jiffies + HZ/10; unsigned int status = 0; do { status = RREG32(MGAREG_Status); } while ((status & 0x08) && time_before(jiffies, timeout)); timeout = jiffies + HZ/10; status = 0; do { status = RREG32(MGAREG_Status); } while (!(status & 0x08) && time_before(jiffies, timeout)); } static inline void mga_wait_busy(struct mga_device *mdev) { unsigned long timeout = jiffies + HZ; unsigned int status = 0; do { status = RREG8(MGAREG_Status + 2); } while ((status & 0x01) && time_before(jiffies, timeout)); } static void mgag200_g200wb_hold_bmc(struct mga_device *mdev) { u8 tmp; int iter_max; /* 1- The first step is to warn the BMC of an upcoming mode change. * We are putting the misc<0> to output.*/ WREG8(DAC_INDEX, MGA1064_GEN_IO_CTL); tmp = RREG8(DAC_DATA); tmp |= 0x10; WREG_DAC(MGA1064_GEN_IO_CTL, tmp); /* we are putting a 1 on the misc<0> line */ WREG8(DAC_INDEX, MGA1064_GEN_IO_DATA); tmp = RREG8(DAC_DATA); tmp |= 0x10; WREG_DAC(MGA1064_GEN_IO_DATA, tmp); /* 2- Second step to mask and further scan request * This will be done by asserting the remfreqmsk bit (XSPAREREG<7>) */ WREG8(DAC_INDEX, MGA1064_SPAREREG); tmp = RREG8(DAC_DATA); tmp |= 0x80; WREG_DAC(MGA1064_SPAREREG, tmp); /* 3a- the third step is to verifu if there is an active scan * We are searching for a 0 on remhsyncsts ) */ iter_max = 300; while (!(tmp & 0x1) && iter_max) { WREG8(DAC_INDEX, MGA1064_SPAREREG); tmp = RREG8(DAC_DATA); udelay(1000); iter_max--; } /* 3b- this step occurs only if the remove is actually scanning * we are waiting for the end of the frame which is a 1 on * remvsyncsts (XSPAREREG<1>) */ if (iter_max) { iter_max = 300; while ((tmp & 0x2) && iter_max) { WREG8(DAC_INDEX, MGA1064_SPAREREG); tmp = RREG8(DAC_DATA); udelay(1000); iter_max--; } } } static void mgag200_g200wb_release_bmc(struct mga_device *mdev) { u8 tmp; /* 1- The first step is to ensure that the vrsten and hrsten are set */ WREG8(MGAREG_CRTCEXT_INDEX, 1); tmp = RREG8(MGAREG_CRTCEXT_DATA); WREG8(MGAREG_CRTCEXT_DATA, tmp | 0x88); /* 2- second step is to assert the rstlvl2 */ WREG8(DAC_INDEX, MGA1064_REMHEADCTL2); tmp = RREG8(DAC_DATA); tmp |= 0x8; WREG8(DAC_DATA, tmp); /* wait 10 us */ udelay(10); /* 3- deassert rstlvl2 */ tmp &= ~0x08; WREG8(DAC_INDEX, MGA1064_REMHEADCTL2); WREG8(DAC_DATA, tmp); /* 4- remove mask of scan request */ WREG8(DAC_INDEX, MGA1064_SPAREREG); tmp = RREG8(DAC_DATA); tmp &= ~0x80; WREG8(DAC_DATA, tmp); /* 5- put back a 0 on the misc<0> line */ WREG8(DAC_INDEX, MGA1064_GEN_IO_DATA); tmp = RREG8(DAC_DATA); tmp &= ~0x10; WREG_DAC(MGA1064_GEN_IO_DATA, tmp); } /* * This is how the framebuffer base address is stored in g200 cards: * * Assume @offset is the gpu_addr variable of the framebuffer object * * Then addr is the number of _pixels_ (not bytes) from the start of * VRAM to the first pixel we want to display. (divided by 2 for 32bit * framebuffers) * * addr is stored in the CRTCEXT0, CRTCC and CRTCD registers * addr<20> -> CRTCEXT0<6> * addr<19-16> -> CRTCEXT0<3-0> * addr<15-8> -> CRTCC<7-0> * addr<7-0> -> CRTCD<7-0> * * CRTCEXT0 has to be programmed last to trigger an update and make the * new addr variable take effect. */ static void mgag200_set_startadd(struct mga_device *mdev, unsigned long offset) { struct drm_device *dev = &mdev->base; u32 startadd; u8 crtcc, crtcd, crtcext0; startadd = offset / 8; if (startadd > 0) drm_WARN_ON_ONCE(dev, mdev->info->bug_no_startadd); /* * Can't store addresses any higher than that, but we also * don't have more than 16 MiB of memory, so it should be fine. */ drm_WARN_ON(dev, startadd > 0x1fffff); RREG_ECRT(0x00, crtcext0); crtcc = (startadd >> 8) & 0xff; crtcd = startadd & 0xff; crtcext0 &= 0xb0; crtcext0 |= ((startadd >> 14) & BIT(6)) | ((startadd >> 16) & 0x0f); WREG_CRT(0x0c, crtcc); WREG_CRT(0x0d, crtcd); WREG_ECRT(0x00, crtcext0); } static void mgag200_set_dac_regs(struct mga_device *mdev) { size_t i; u8 dacvalue[] = { /* 0x00: */ 0, 0, 0, 0, 0, 0, 0x00, 0, /* 0x08: */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10: */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x18: */ 0x00, 0, 0xC9, 0xFF, 0xBF, 0x20, 0x1F, 0x20, /* 0x20: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28: */ 0x00, 0x00, 0x00, 0x00, 0, 0, 0, 0x40, /* 0x30: */ 0x00, 0xB0, 0x00, 0xC2, 0x34, 0x14, 0x02, 0x83, /* 0x38: */ 0x00, 0x93, 0x00, 0x77, 0x00, 0x00, 0x00, 0x3A, /* 0x40: */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x48: */ 0, 0, 0, 0, 0, 0, 0, 0 }; switch (mdev->type) { case G200_PCI: case G200_AGP: dacvalue[MGA1064_SYS_PLL_M] = 0x04; dacvalue[MGA1064_SYS_PLL_N] = 0x2D; dacvalue[MGA1064_SYS_PLL_P] = 0x19; break; case G200_SE_A: case G200_SE_B: dacvalue[MGA1064_VREF_CTL] = 0x03; dacvalue[MGA1064_PIX_CLK_CTL] = MGA1064_PIX_CLK_CTL_SEL_PLL; dacvalue[MGA1064_MISC_CTL] = MGA1064_MISC_CTL_DAC_EN | MGA1064_MISC_CTL_VGA8 | MGA1064_MISC_CTL_DAC_RAM_CS; break; case G200_WB: case G200_EW3: dacvalue[MGA1064_VREF_CTL] = 0x07; break; case G200_EV: dacvalue[MGA1064_PIX_CLK_CTL] = MGA1064_PIX_CLK_CTL_SEL_PLL; dacvalue[MGA1064_MISC_CTL] = MGA1064_MISC_CTL_VGA8 | MGA1064_MISC_CTL_DAC_RAM_CS; break; case G200_EH: case G200_EH3: dacvalue[MGA1064_MISC_CTL] = MGA1064_MISC_CTL_VGA8 | MGA1064_MISC_CTL_DAC_RAM_CS; break; case G200_ER: break; } for (i = 0; i < ARRAY_SIZE(dacvalue); i++) { if ((i <= 0x17) || (i == 0x1b) || (i == 0x1c) || ((i >= 0x1f) && (i <= 0x29)) || ((i >= 0x30) && (i <= 0x37))) continue; if (IS_G200_SE(mdev) && ((i == 0x2c) || (i == 0x2d) || (i == 0x2e))) continue; if ((mdev->type == G200_EV || mdev->type == G200_WB || mdev->type == G200_EH || mdev->type == G200_EW3 || mdev->type == G200_EH3) && (i >= 0x44) && (i <= 0x4e)) continue; WREG_DAC(i, dacvalue[i]); } if (mdev->type == G200_ER) WREG_DAC(0x90, 0); } static void mgag200_init_regs(struct mga_device *mdev) { u8 crtc11, misc; mgag200_set_dac_regs(mdev); WREG_SEQ(2, 0x0f); WREG_SEQ(3, 0x00); WREG_SEQ(4, 0x0e); WREG_CRT(10, 0); WREG_CRT(11, 0); WREG_CRT(12, 0); WREG_CRT(13, 0); WREG_CRT(14, 0); WREG_CRT(15, 0); RREG_CRT(0x11, crtc11); crtc11 &= ~(MGAREG_CRTC11_CRTCPROTECT | MGAREG_CRTC11_VINTEN | MGAREG_CRTC11_VINTCLR); WREG_CRT(0x11, crtc11); if (mdev->type == G200_ER) WREG_ECRT(0x24, 0x5); if (mdev->type == G200_EW3) WREG_ECRT(0x34, 0x5); misc = RREG8(MGA_MISC_IN); misc |= MGAREG_MISC_IOADSEL; WREG8(MGA_MISC_OUT, misc); } static void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode) { const struct mgag200_device_info *info = mdev->info; unsigned int hdisplay, hsyncstart, hsyncend, htotal; unsigned int vdisplay, vsyncstart, vsyncend, vtotal; u8 misc, crtcext1, crtcext2, crtcext5; hdisplay = mode->hdisplay / 8 - 1; hsyncstart = mode->hsync_start / 8 - 1; hsyncend = mode->hsync_end / 8 - 1; htotal = mode->htotal / 8 - 1; /* Work around hardware quirk */ if ((htotal & 0x07) == 0x06 || (htotal & 0x07) == 0x04) htotal++; vdisplay = mode->vdisplay - 1; vsyncstart = mode->vsync_start - 1; vsyncend = mode->vsync_end - 1; vtotal = mode->vtotal - 2; misc = RREG8(MGA_MISC_IN); if (mode->flags & DRM_MODE_FLAG_NHSYNC) misc |= MGAREG_MISC_HSYNCPOL; else misc &= ~MGAREG_MISC_HSYNCPOL; if (mode->flags & DRM_MODE_FLAG_NVSYNC) misc |= MGAREG_MISC_VSYNCPOL; else misc &= ~MGAREG_MISC_VSYNCPOL; crtcext1 = (((htotal - 4) & 0x100) >> 8) | ((hdisplay & 0x100) >> 7) | ((hsyncstart & 0x100) >> 6) | (htotal & 0x40); if (info->has_vidrst) crtcext1 |= MGAREG_CRTCEXT1_VRSTEN | MGAREG_CRTCEXT1_HRSTEN; crtcext2 = ((vtotal & 0xc00) >> 10) | ((vdisplay & 0x400) >> 8) | ((vdisplay & 0xc00) >> 7) | ((vsyncstart & 0xc00) >> 5) | ((vdisplay & 0x400) >> 3); crtcext5 = 0x00; WREG_CRT(0, htotal - 4); WREG_CRT(1, hdisplay); WREG_CRT(2, hdisplay); WREG_CRT(3, (htotal & 0x1F) | 0x80); WREG_CRT(4, hsyncstart); WREG_CRT(5, ((htotal & 0x20) << 2) | (hsyncend & 0x1F)); WREG_CRT(6, vtotal & 0xFF); WREG_CRT(7, ((vtotal & 0x100) >> 8) | ((vdisplay & 0x100) >> 7) | ((vsyncstart & 0x100) >> 6) | ((vdisplay & 0x100) >> 5) | ((vdisplay & 0x100) >> 4) | /* linecomp */ ((vtotal & 0x200) >> 4) | ((vdisplay & 0x200) >> 3) | ((vsyncstart & 0x200) >> 2)); WREG_CRT(9, ((vdisplay & 0x200) >> 4) | ((vdisplay & 0x200) >> 3)); WREG_CRT(16, vsyncstart & 0xFF); WREG_CRT(17, (vsyncend & 0x0F) | 0x20); WREG_CRT(18, vdisplay & 0xFF); WREG_CRT(20, 0); WREG_CRT(21, vdisplay & 0xFF); WREG_CRT(22, (vtotal + 1) & 0xFF); WREG_CRT(23, 0xc3); WREG_CRT(24, vdisplay & 0xFF); WREG_ECRT(0x01, crtcext1); WREG_ECRT(0x02, crtcext2); WREG_ECRT(0x05, crtcext5); WREG8(MGA_MISC_OUT, misc); } static u8 mgag200_get_bpp_shift(const struct drm_format_info *format) { static const u8 bpp_shift[] = {0, 1, 0, 2}; return bpp_shift[format->cpp[0] - 1]; } /* * Calculates the HW offset value from the framebuffer's pitch. The * offset is a multiple of the pixel size and depends on the display * format. */ static u32 mgag200_calculate_offset(struct mga_device *mdev, const struct drm_framebuffer *fb) { u32 offset = fb->pitches[0] / fb->format->cpp[0]; u8 bppshift = mgag200_get_bpp_shift(fb->format); if (fb->format->cpp[0] * 8 == 24) offset = (offset * 3) >> (4 - bppshift); else offset = offset >> (4 - bppshift); return offset; } static void mgag200_set_offset(struct mga_device *mdev, const struct drm_framebuffer *fb) { u8 crtc13, crtcext0; u32 offset = mgag200_calculate_offset(mdev, fb); RREG_ECRT(0, crtcext0); crtc13 = offset & 0xff; crtcext0 &= ~MGAREG_CRTCEXT0_OFFSET_MASK; crtcext0 |= (offset >> 4) & MGAREG_CRTCEXT0_OFFSET_MASK; WREG_CRT(0x13, crtc13); WREG_ECRT(0x00, crtcext0); } static void mgag200_set_format_regs(struct mga_device *mdev, const struct drm_framebuffer *fb) { struct drm_device *dev = &mdev->base; const struct drm_format_info *format = fb->format; unsigned int bpp, bppshift, scale; u8 crtcext3, xmulctrl; bpp = format->cpp[0] * 8; bppshift = mgag200_get_bpp_shift(format); switch (bpp) { case 24: scale = ((1 << bppshift) * 3) - 1; break; default: scale = (1 << bppshift) - 1; break; } RREG_ECRT(3, crtcext3); switch (bpp) { case 8: xmulctrl = MGA1064_MUL_CTL_8bits; break; case 16: if (format->depth == 15) xmulctrl = MGA1064_MUL_CTL_15bits; else xmulctrl = MGA1064_MUL_CTL_16bits; break; case 24: xmulctrl = MGA1064_MUL_CTL_24bits; break; case 32: xmulctrl = MGA1064_MUL_CTL_32_24bits; break; default: /* BUG: We should have caught this problem already. */ drm_WARN_ON(dev, "invalid format depth\n"); return; } crtcext3 &= ~GENMASK(2, 0); crtcext3 |= scale; WREG_DAC(MGA1064_MUL_CTL, xmulctrl); WREG_GFX(0, 0x00); WREG_GFX(1, 0x00); WREG_GFX(2, 0x00); WREG_GFX(3, 0x00); WREG_GFX(4, 0x00); WREG_GFX(5, 0x40); /* GCTL6 should be 0x05, but we configure memmapsl to 0xb8000 (text mode), * so that it doesn't hang when running kexec/kdump on G200_SE rev42. */ WREG_GFX(6, 0x0d); WREG_GFX(7, 0x0f); WREG_GFX(8, 0x0f); WREG_ECRT(3, crtcext3); } static void mgag200_g200er_reset_tagfifo(struct mga_device *mdev) { static uint32_t RESET_FLAG = 0x00200000; /* undocumented magic value */ u32 memctl; memctl = RREG32(MGAREG_MEMCTL); memctl |= RESET_FLAG; WREG32(MGAREG_MEMCTL, memctl); udelay(1000); memctl &= ~RESET_FLAG; WREG32(MGAREG_MEMCTL, memctl); } static void mgag200_g200se_set_hiprilvl(struct mga_device *mdev, const struct drm_display_mode *mode, const struct drm_framebuffer *fb) { struct mgag200_g200se_device *g200se = to_mgag200_g200se_device(&mdev->base); unsigned int hiprilvl; u8 crtcext6; if (g200se->unique_rev_id >= 0x04) { hiprilvl = 0; } else if (g200se->unique_rev_id >= 0x02) { unsigned int bpp; unsigned long mb; if (fb->format->cpp[0] * 8 > 16) bpp = 32; else if (fb->format->cpp[0] * 8 > 8) bpp = 16; else bpp = 8; mb = (mode->clock * bpp) / 1000; if (mb > 3100) hiprilvl = 0; else if (mb > 2600) hiprilvl = 1; else if (mb > 1900) hiprilvl = 2; else if (mb > 1160) hiprilvl = 3; else if (mb > 440) hiprilvl = 4; else hiprilvl = 5; } else if (g200se->unique_rev_id >= 0x01) { hiprilvl = 3; } else { hiprilvl = 4; } crtcext6 = hiprilvl; /* implicitly sets maxhipri to 0 */ WREG_ECRT(0x06, crtcext6); } static void mgag200_g200ev_set_hiprilvl(struct mga_device *mdev) { WREG_ECRT(0x06, 0x00); } static void mgag200_enable_display(struct mga_device *mdev) { u8 seq0, seq1, crtcext1; RREG_SEQ(0x00, seq0); seq0 |= MGAREG_SEQ0_SYNCRST | MGAREG_SEQ0_ASYNCRST; WREG_SEQ(0x00, seq0); /* * TODO: replace busy waiting with vblank IRQ; put * msleep(50) before changing SCROFF */ mga_wait_vsync(mdev); mga_wait_busy(mdev); RREG_SEQ(0x01, seq1); seq1 &= ~MGAREG_SEQ1_SCROFF; WREG_SEQ(0x01, seq1); msleep(20); RREG_ECRT(0x01, crtcext1); crtcext1 &= ~MGAREG_CRTCEXT1_VSYNCOFF; crtcext1 &= ~MGAREG_CRTCEXT1_HSYNCOFF; WREG_ECRT(0x01, crtcext1); } static void mgag200_disable_display(struct mga_device *mdev) { u8 seq0, seq1, crtcext1; RREG_SEQ(0x00, seq0); seq0 &= ~MGAREG_SEQ0_SYNCRST; WREG_SEQ(0x00, seq0); /* * TODO: replace busy waiting with vblank IRQ; put * msleep(50) before changing SCROFF */ mga_wait_vsync(mdev); mga_wait_busy(mdev); RREG_SEQ(0x01, seq1); seq1 |= MGAREG_SEQ1_SCROFF; WREG_SEQ(0x01, seq1); msleep(20); RREG_ECRT(0x01, crtcext1); crtcext1 |= MGAREG_CRTCEXT1_VSYNCOFF | MGAREG_CRTCEXT1_HSYNCOFF; WREG_ECRT(0x01, crtcext1); } /* * Connector */ static int mgag200_vga_connector_helper_get_modes(struct drm_connector *connector) { struct mga_device *mdev = to_mga_device(connector->dev); int ret; /* * Protect access to I/O registers from concurrent modesetting * by acquiring the I/O-register lock. */ mutex_lock(&mdev->rmmio_lock); ret = drm_connector_helper_get_modes_from_ddc(connector); mutex_unlock(&mdev->rmmio_lock); return ret; } static const struct drm_connector_helper_funcs mga_vga_connector_helper_funcs = { .get_modes = mgag200_vga_connector_helper_get_modes, }; static const struct drm_connector_funcs mga_vga_connector_funcs = { .reset = drm_atomic_helper_connector_reset, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; /* * Simple Display Pipe */ static enum drm_mode_status mgag200_simple_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe, const struct drm_display_mode *mode) { struct mga_device *mdev = to_mga_device(pipe->crtc.dev); const struct mgag200_device_info *info = mdev->info; /* * Some devices have additional limits on the size of the * display mode. */ if (mode->hdisplay > info->max_hdisplay) return MODE_VIRTUAL_X; if (mode->vdisplay > info->max_vdisplay) return MODE_VIRTUAL_Y; if ((mode->hdisplay % 8) != 0 || (mode->hsync_start % 8) != 0 || (mode->hsync_end % 8) != 0 || (mode->htotal % 8) != 0) { return MODE_H_ILLEGAL; } if (mode->crtc_hdisplay > 2048 || mode->crtc_hsync_start > 4096 || mode->crtc_hsync_end > 4096 || mode->crtc_htotal > 4096 || mode->crtc_vdisplay > 2048 || mode->crtc_vsync_start > 4096 || mode->crtc_vsync_end > 4096 || mode->crtc_vtotal > 4096) { return MODE_BAD; } return MODE_OK; } static void mgag200_handle_damage(struct mga_device *mdev, struct drm_framebuffer *fb, struct drm_rect *clip, const struct iosys_map *map) { void __iomem *dst = mdev->vram; void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */ dst += drm_fb_clip_offset(fb->pitches[0], fb->format, clip); drm_fb_memcpy_toio(dst, fb->pitches[0], vmap, fb, clip); } static void mgag200_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_crtc_state *crtc_state, struct drm_plane_state *plane_state) { struct drm_crtc *crtc = &pipe->crtc; struct drm_device *dev = crtc->dev; struct mga_device *mdev = to_mga_device(dev); struct mgag200_pll *pixpll = &mdev->pixpll; struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state); struct drm_framebuffer *fb = plane_state->fb; struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); struct drm_rect fullscreen = { .x1 = 0, .x2 = fb->width, .y1 = 0, .y2 = fb->height, }; /* * Concurrent operations could possibly trigger a call to * drm_connector_helper_funcs.get_modes by trying to read the * display modes. Protect access to I/O registers by acquiring * the I/O-register lock. */ mutex_lock(&mdev->rmmio_lock); if (mdev->type == G200_WB || mdev->type == G200_EW3) mgag200_g200wb_hold_bmc(mdev); mgag200_set_format_regs(mdev, fb); mgag200_set_mode_regs(mdev, adjusted_mode); pixpll->funcs->update(pixpll, &mgag200_crtc_state->pixpllc); if (mdev->type == G200_ER) mgag200_g200er_reset_tagfifo(mdev); if (IS_G200_SE(mdev)) mgag200_g200se_set_hiprilvl(mdev, adjusted_mode, fb); else if (mdev->type == G200_EV) mgag200_g200ev_set_hiprilvl(mdev); if (mdev->type == G200_WB || mdev->type == G200_EW3) mgag200_g200wb_release_bmc(mdev); if (crtc_state->gamma_lut) mgag200_crtc_set_gamma(mdev, fb->format, crtc_state->gamma_lut->data); else mgag200_crtc_set_gamma_linear(mdev, fb->format); mgag200_enable_display(mdev); mgag200_handle_damage(mdev, fb, &fullscreen, &shadow_plane_state->data[0]); /* Always scanout image at VRAM offset 0 */ mgag200_set_startadd(mdev, (u32)0); mgag200_set_offset(mdev, fb); mutex_unlock(&mdev->rmmio_lock); } static void mgag200_simple_display_pipe_disable(struct drm_simple_display_pipe *pipe) { struct drm_crtc *crtc = &pipe->crtc; struct mga_device *mdev = to_mga_device(crtc->dev); mgag200_disable_display(mdev); } static int mgag200_simple_display_pipe_check(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state, struct drm_crtc_state *crtc_state) { struct drm_plane *plane = plane_state->plane; struct drm_device *dev = plane->dev; struct mga_device *mdev = to_mga_device(dev); struct mgag200_pll *pixpll = &mdev->pixpll; struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state); struct drm_framebuffer *new_fb = plane_state->fb; struct drm_framebuffer *fb = NULL; int ret; if (!new_fb) return 0; if (plane->state) fb = plane->state->fb; if (!fb || (fb->format != new_fb->format)) crtc_state->mode_changed = true; /* update PLL settings */ if (crtc_state->mode_changed) { ret = pixpll->funcs->compute(pixpll, crtc_state->mode.clock, &mgag200_crtc_state->pixpllc); if (ret) return ret; } if (crtc_state->color_mgmt_changed && crtc_state->gamma_lut) { if (crtc_state->gamma_lut->length != MGAG200_LUT_SIZE * sizeof(struct drm_color_lut)) { drm_err(dev, "Wrong size for gamma_lut %zu\n", crtc_state->gamma_lut->length); return -EINVAL; } } return 0; } static void mgag200_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_plane_state *old_state) { struct drm_plane *plane = &pipe->plane; struct drm_crtc *crtc = &pipe->crtc; struct drm_device *dev = plane->dev; struct mga_device *mdev = to_mga_device(dev); struct drm_plane_state *state = plane->state; struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); struct drm_framebuffer *fb = state->fb; struct drm_rect damage; struct drm_atomic_helper_damage_iter iter; if (!fb) return; mutex_lock(&mdev->rmmio_lock); if (crtc->state->color_mgmt_changed && crtc->state->gamma_lut) mgag200_crtc_set_gamma(mdev, fb->format, crtc->state->gamma_lut->data); drm_atomic_helper_damage_iter_init(&iter, old_state, state); drm_atomic_for_each_plane_damage(&iter, &damage) { mgag200_handle_damage(mdev, fb, &damage, &shadow_plane_state->data[0]); } /* Always scanout image at VRAM offset 0 */ mgag200_set_startadd(mdev, (u32)0); mgag200_set_offset(mdev, fb); mutex_unlock(&mdev->rmmio_lock); } static struct drm_crtc_state * mgag200_simple_display_pipe_duplicate_crtc_state(struct drm_simple_display_pipe *pipe) { struct drm_crtc *crtc = &pipe->crtc; struct drm_crtc_state *crtc_state = crtc->state; struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state); struct mgag200_crtc_state *new_mgag200_crtc_state; if (!crtc_state) return NULL; new_mgag200_crtc_state = kzalloc(sizeof(*new_mgag200_crtc_state), GFP_KERNEL); if (!new_mgag200_crtc_state) return NULL; __drm_atomic_helper_crtc_duplicate_state(crtc, &new_mgag200_crtc_state->base); memcpy(&new_mgag200_crtc_state->pixpllc, &mgag200_crtc_state->pixpllc, sizeof(new_mgag200_crtc_state->pixpllc)); return &new_mgag200_crtc_state->base; } static void mgag200_simple_display_pipe_destroy_crtc_state(struct drm_simple_display_pipe *pipe, struct drm_crtc_state *crtc_state) { struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state); __drm_atomic_helper_crtc_destroy_state(&mgag200_crtc_state->base); kfree(mgag200_crtc_state); } static void mgag200_simple_display_pipe_reset_crtc(struct drm_simple_display_pipe *pipe) { struct drm_crtc *crtc = &pipe->crtc; struct mgag200_crtc_state *mgag200_crtc_state; if (crtc->state) { mgag200_simple_display_pipe_destroy_crtc_state(pipe, crtc->state); crtc->state = NULL; /* must be set to NULL here */ } mgag200_crtc_state = kzalloc(sizeof(*mgag200_crtc_state), GFP_KERNEL); if (!mgag200_crtc_state) return; __drm_atomic_helper_crtc_reset(crtc, &mgag200_crtc_state->base); } static const struct drm_simple_display_pipe_funcs mgag200_simple_display_pipe_funcs = { .mode_valid = mgag200_simple_display_pipe_mode_valid, .enable = mgag200_simple_display_pipe_enable, .disable = mgag200_simple_display_pipe_disable, .check = mgag200_simple_display_pipe_check, .update = mgag200_simple_display_pipe_update, .reset_crtc = mgag200_simple_display_pipe_reset_crtc, .duplicate_crtc_state = mgag200_simple_display_pipe_duplicate_crtc_state, .destroy_crtc_state = mgag200_simple_display_pipe_destroy_crtc_state, DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, }; static const uint32_t mgag200_simple_display_pipe_formats[] = { DRM_FORMAT_XRGB8888, DRM_FORMAT_RGB565, DRM_FORMAT_RGB888, }; static const uint64_t mgag200_simple_display_pipe_fmtmods[] = { DRM_FORMAT_MOD_LINEAR, DRM_FORMAT_MOD_INVALID }; /* * Mode config */ /* Calculates a mode's required memory bandwidth (in KiB/sec). */ static uint32_t mgag200_calculate_mode_bandwidth(const struct drm_display_mode *mode, unsigned int bits_per_pixel) { uint32_t total_area, divisor; uint64_t active_area, pixels_per_second, bandwidth; uint64_t bytes_per_pixel = (bits_per_pixel + 7) / 8; divisor = 1024; if (!mode->htotal || !mode->vtotal || !mode->clock) return 0; active_area = mode->hdisplay * mode->vdisplay; total_area = mode->htotal * mode->vtotal; pixels_per_second = active_area * mode->clock * 1000; do_div(pixels_per_second, total_area); bandwidth = pixels_per_second * bytes_per_pixel * 100; do_div(bandwidth, divisor); return (uint32_t)bandwidth; } static enum drm_mode_status mgag200_mode_config_mode_valid(struct drm_device *dev, const struct drm_display_mode *mode) { static const unsigned int max_bpp = 4; // DRM_FORMAT_XRGB8888 struct mga_device *mdev = to_mga_device(dev); unsigned long fbsize, fbpages, max_fbpages; const struct mgag200_device_info *info = mdev->info; max_fbpages = mdev->vram_available >> PAGE_SHIFT; fbsize = mode->hdisplay * mode->vdisplay * max_bpp; fbpages = DIV_ROUND_UP(fbsize, PAGE_SIZE); if (fbpages > max_fbpages) return MODE_MEM; /* * Test the mode's required memory bandwidth if the device * specifies a maximum. Not all devices do though. */ if (info->max_mem_bandwidth) { uint32_t mode_bandwidth = mgag200_calculate_mode_bandwidth(mode, max_bpp * 8); if (mode_bandwidth > (info->max_mem_bandwidth * 1024)) return MODE_BAD; } return MODE_OK; } static const struct drm_mode_config_funcs mgag200_mode_config_funcs = { .fb_create = drm_gem_fb_create_with_dirty, .mode_valid = mgag200_mode_config_mode_valid, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; int mgag200_modeset_init(struct mga_device *mdev, resource_size_t vram_available) { struct drm_device *dev = &mdev->base; struct mga_i2c_chan *i2c = &mdev->i2c; struct drm_connector *connector = &mdev->connector; struct drm_simple_display_pipe *pipe = &mdev->display_pipe; size_t format_count = ARRAY_SIZE(mgag200_simple_display_pipe_formats); int ret; mgag200_init_regs(mdev); mdev->vram_available = vram_available; ret = drmm_mode_config_init(dev); if (ret) { drm_err(dev, "drmm_mode_config_init() failed, error %d\n", ret); return ret; } dev->mode_config.max_width = MGAG200_MAX_FB_WIDTH; dev->mode_config.max_height = MGAG200_MAX_FB_HEIGHT; dev->mode_config.preferred_depth = 24; dev->mode_config.fb_base = mdev->vram_res->start; dev->mode_config.funcs = &mgag200_mode_config_funcs; ret = mgag200_i2c_init(mdev, i2c); if (ret) { drm_err(dev, "failed to add DDC bus: %d\n", ret); return ret; } ret = drm_connector_init_with_ddc(dev, connector, &mga_vga_connector_funcs, DRM_MODE_CONNECTOR_VGA, &i2c->adapter); if (ret) { drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret); return ret; } drm_connector_helper_add(connector, &mga_vga_connector_helper_funcs); ret = mgag200_pixpll_init(&mdev->pixpll, mdev); if (ret) return ret; ret = drm_simple_display_pipe_init(dev, pipe, &mgag200_simple_display_pipe_funcs, mgag200_simple_display_pipe_formats, format_count, mgag200_simple_display_pipe_fmtmods, connector); if (ret) { drm_err(dev, "drm_simple_display_pipe_init() failed, error %d\n", ret); return ret; } drm_plane_enable_fb_damage_clips(&pipe->plane); /* FIXME: legacy gamma tables, but atomic gamma doesn't work without */ drm_mode_crtc_set_gamma_size(&pipe->crtc, MGAG200_LUT_SIZE); drm_crtc_enable_color_mgmt(&pipe->crtc, 0, false, MGAG200_LUT_SIZE); drm_mode_config_reset(dev); return 0; }