diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_g200eh5.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_g200eh5.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_g200eh5.c b/drivers/gpu/drm/mgag200/mgag200_g200eh5.c new file mode 100644 index 000000000000..e2a2942a80a0 --- /dev/null +++ b/drivers/gpu/drm/mgag200/mgag200_g200eh5.c @@ -0,0 +1,204 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/limits.h> +#include <linux/pci.h> +#include <linux/units.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_probe_helper.h> + +#include "mgag200_drv.h" + +/* + * PIXPLLC + */ + +static int mgag200_g200eh5_pixpllc_atomic_check(struct drm_crtc *crtc, + struct drm_atomic_state *new_state) +{ + const unsigned long long VCO_MAX = 10 * GIGA; // Hz + const unsigned long long VCO_MIN = 2500 * MEGA; // Hz + const unsigned long long PLL_FREQ_REF = 25 * MEGA; // Hz + + struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc); + struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state); + long clock = new_crtc_state->mode.clock; + struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc; + + unsigned long long fdelta = ULLONG_MAX; + + u16 mult_max = (u16)(VCO_MAX / PLL_FREQ_REF); // 400 (0x190) + u16 mult_min = (u16)(VCO_MIN / PLL_FREQ_REF); // 100 (0x64) + + u64 ftmp_delta; + u64 computed_fo; + + u16 test_m; + u8 test_div_a; + u8 test_div_b; + u64 fo_hz; + + u8 uc_m = 0; + u8 uc_n = 0; + u8 uc_p = 0; + + fo_hz = (u64)clock * HZ_PER_KHZ; + + for (test_m = mult_min; test_m <= mult_max; test_m++) { // This gives 100 <= M <= 400 + for (test_div_a = 8; test_div_a > 0; test_div_a--) { // This gives 1 <= A <= 8 + for (test_div_b = 1; test_div_b <= test_div_a; test_div_b++) { + // This gives 1 <= B <= A + computed_fo = (PLL_FREQ_REF * test_m) / + (4 * test_div_a * test_div_b); + + if (computed_fo > fo_hz) + ftmp_delta = computed_fo - fo_hz; + else + ftmp_delta = fo_hz - computed_fo; + + if (ftmp_delta < fdelta) { + fdelta = ftmp_delta; + uc_m = (u8)(0xFF & test_m); + uc_n = (u8)((0x7 & (test_div_a - 1)) + | (0x70 & (0x7 & (test_div_b - 1)) << 4)); + uc_p = (u8)(1 & (test_m >> 8)); + } + if (fdelta == 0) + break; + } + if (fdelta == 0) + break; + } + if (fdelta == 0) + break; + } + + pixpllc->m = uc_m + 1; + pixpllc->n = uc_n + 1; + pixpllc->p = uc_p + 1; + pixpllc->s = 0; + + return 0; + } + +/* + * Mode-setting pipeline + */ + +static const struct drm_plane_helper_funcs mgag200_g200eh5_primary_plane_helper_funcs = { + MGAG200_PRIMARY_PLANE_HELPER_FUNCS, +}; + +static const struct drm_plane_funcs mgag200_g200eh5_primary_plane_funcs = { + MGAG200_PRIMARY_PLANE_FUNCS, +}; + +static const struct drm_crtc_helper_funcs mgag200_g200eh5_crtc_helper_funcs = { + MGAG200_CRTC_HELPER_FUNCS, +}; + +static const struct drm_crtc_funcs mgag200_g200eh5_crtc_funcs = { + MGAG200_CRTC_FUNCS, +}; + +static int mgag200_g200eh5_pipeline_init(struct mga_device *mdev) +{ + struct drm_device *dev = &mdev->base; + struct drm_plane *primary_plane = &mdev->primary_plane; + struct drm_crtc *crtc = &mdev->crtc; + int ret; + + ret = drm_universal_plane_init(dev, primary_plane, 0, + &mgag200_g200eh5_primary_plane_funcs, + mgag200_primary_plane_formats, + mgag200_primary_plane_formats_size, + mgag200_primary_plane_fmtmods, + DRM_PLANE_TYPE_PRIMARY, NULL); + if (ret) { + drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret); + return ret; + } + drm_plane_helper_add(primary_plane, &mgag200_g200eh5_primary_plane_helper_funcs); + drm_plane_enable_fb_damage_clips(primary_plane); + + ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL, + &mgag200_g200eh5_crtc_funcs, NULL); + if (ret) { + drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret); + return ret; + } + + drm_crtc_helper_add(crtc, &mgag200_g200eh5_crtc_helper_funcs); + + /* FIXME: legacy gamma tables, but atomic gamma doesn't work without */ + drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE); + drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE); + ret = mgag200_vga_bmc_output_init(mdev); + + if (ret) + return ret; + + return 0; +} + +/* + * DRM device + */ + +static const struct mgag200_device_info mgag200_g200eh5_device_info = + MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false); + +static const struct mgag200_device_funcs mgag200_g200eh5_device_funcs = { + .pixpllc_atomic_check = mgag200_g200eh5_pixpllc_atomic_check, + .pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH +}; + +struct mga_device *mgag200_g200eh5_device_create(struct pci_dev *pdev, + const struct drm_driver *drv) +{ + struct mga_device *mdev; + struct drm_device *dev; + resource_size_t vram_available; + int ret; + + mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base); + + if (IS_ERR(mdev)) + return mdev; + dev = &mdev->base; + + pci_set_drvdata(pdev, dev); + + ret = mgag200_init_pci_options(pdev, 0x00000120, 0x0000b000); + if (ret) + return ERR_PTR(ret); + + ret = mgag200_device_preinit(mdev); + if (ret) + return ERR_PTR(ret); + + ret = mgag200_device_init(mdev, &mgag200_g200eh5_device_info, + &mgag200_g200eh5_device_funcs); + + if (ret) + return ERR_PTR(ret); + + mgag200_g200eh_init_registers(mdev); // same as G200EH + vram_available = mgag200_device_probe_vram(mdev); + + ret = mgag200_mode_config_init(mdev, vram_available); + if (ret) + return ERR_PTR(ret); + + ret = mgag200_g200eh5_pipeline_init(mdev); + if (ret) + return ERR_PTR(ret); + + drm_mode_config_reset(dev); + drm_kms_helper_poll_init(dev); + + return mdev; +} |