245 lines
6.5 KiB
C
245 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/pci.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_gem_atomic_helper.h>
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#include <drm/drm_probe_helper.h>
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#include "mgag200_drv.h"
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static void mgag200_g200ew3_init_registers(struct mga_device *mdev)
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{
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mgag200_g200wb_init_registers(mdev); // same as G200WB
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WREG_ECRT(0x34, 0x5); // G200EW3 specific
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}
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/*
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* PIXPLLC
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*/
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static int mgag200_g200ew3_pixpllc_atomic_check(struct drm_crtc *crtc,
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struct drm_atomic_state *new_state)
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{
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static const unsigned int vcomax = 800000;
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static const unsigned int vcomin = 400000;
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static const unsigned int pllreffreq = 25000;
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struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
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struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
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long clock = new_crtc_state->mode.clock;
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struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
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unsigned int delta, tmpdelta;
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unsigned int testp, testm, testn, testp2;
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unsigned int p, m, n, s;
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unsigned int computed;
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m = n = p = s = 0;
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delta = 0xffffffff;
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for (testp = 1; testp < 8; testp++) {
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for (testp2 = 1; testp2 < 8; testp2++) {
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if (testp < testp2)
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continue;
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if ((clock * testp * testp2) > vcomax)
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continue;
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if ((clock * testp * testp2) < vcomin)
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continue;
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for (testm = 1; testm < 26; testm++) {
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for (testn = 32; testn < 2048 ; testn++) {
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computed = (pllreffreq * testn) / (testm * testp * testp2);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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m = testm + 1;
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n = testn + 1;
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p = testp + 1;
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s = testp2;
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}
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}
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}
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}
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}
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pixpllc->m = m;
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pixpllc->n = n;
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pixpllc->p = p;
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pixpllc->s = s;
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return 0;
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}
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/*
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* Mode-setting pipeline
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*/
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static const struct drm_plane_helper_funcs mgag200_g200ew3_primary_plane_helper_funcs = {
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MGAG200_PRIMARY_PLANE_HELPER_FUNCS,
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};
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static const struct drm_plane_funcs mgag200_g200ew3_primary_plane_funcs = {
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MGAG200_PRIMARY_PLANE_FUNCS,
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};
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static const struct drm_crtc_helper_funcs mgag200_g200ew3_crtc_helper_funcs = {
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MGAG200_CRTC_HELPER_FUNCS,
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};
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static const struct drm_crtc_funcs mgag200_g200ew3_crtc_funcs = {
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MGAG200_CRTC_FUNCS,
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};
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static const struct drm_encoder_funcs mgag200_g200ew3_dac_encoder_funcs = {
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MGAG200_DAC_ENCODER_FUNCS,
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};
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static const struct drm_connector_helper_funcs mgag200_g200ew3_vga_connector_helper_funcs = {
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MGAG200_VGA_CONNECTOR_HELPER_FUNCS,
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};
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static const struct drm_connector_funcs mgag200_g200ew3_vga_connector_funcs = {
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MGAG200_VGA_CONNECTOR_FUNCS,
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};
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static int mgag200_g200ew3_pipeline_init(struct mga_device *mdev)
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{
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struct drm_device *dev = &mdev->base;
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struct drm_plane *primary_plane = &mdev->primary_plane;
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struct drm_crtc *crtc = &mdev->crtc;
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struct drm_encoder *encoder = &mdev->encoder;
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struct mga_i2c_chan *i2c = &mdev->i2c;
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struct drm_connector *connector = &mdev->connector;
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int ret;
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ret = drm_universal_plane_init(dev, primary_plane, 0,
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&mgag200_g200ew3_primary_plane_funcs,
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mgag200_primary_plane_formats,
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mgag200_primary_plane_formats_size,
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mgag200_primary_plane_fmtmods,
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DRM_PLANE_TYPE_PRIMARY, NULL);
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if (ret) {
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drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret);
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return ret;
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}
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drm_plane_helper_add(primary_plane, &mgag200_g200ew3_primary_plane_helper_funcs);
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drm_plane_enable_fb_damage_clips(primary_plane);
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ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
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&mgag200_g200ew3_crtc_funcs, NULL);
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if (ret) {
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drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret);
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return ret;
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}
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drm_crtc_helper_add(crtc, &mgag200_g200ew3_crtc_helper_funcs);
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/* FIXME: legacy gamma tables, but atomic gamma doesn't work without */
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drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE);
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drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE);
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encoder->possible_crtcs = drm_crtc_mask(crtc);
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ret = drm_encoder_init(dev, encoder, &mgag200_g200ew3_dac_encoder_funcs,
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DRM_MODE_ENCODER_DAC, NULL);
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if (ret) {
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drm_err(dev, "drm_encoder_init() failed: %d\n", ret);
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return ret;
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}
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ret = mgag200_i2c_init(mdev, i2c);
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if (ret) {
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drm_err(dev, "failed to add DDC bus: %d\n", ret);
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return ret;
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}
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ret = drm_connector_init_with_ddc(dev, connector,
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&mgag200_g200ew3_vga_connector_funcs,
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DRM_MODE_CONNECTOR_VGA,
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&i2c->adapter);
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if (ret) {
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drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret);
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return ret;
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}
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drm_connector_helper_add(connector, &mgag200_g200ew3_vga_connector_helper_funcs);
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ret = drm_connector_attach_encoder(connector, encoder);
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if (ret) {
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drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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/*
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* DRM device
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*/
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static const struct mgag200_device_info mgag200_g200ew3_device_info =
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MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, true, 0, 1, false);
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static const struct mgag200_device_funcs mgag200_g200ew3_device_funcs = {
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.disable_vidrst = mgag200_bmc_disable_vidrst,
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.enable_vidrst = mgag200_bmc_enable_vidrst,
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.pixpllc_atomic_check = mgag200_g200ew3_pixpllc_atomic_check,
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.pixpllc_atomic_update = mgag200_g200wb_pixpllc_atomic_update, // same as G200WB
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};
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static resource_size_t mgag200_g200ew3_device_probe_vram(struct mga_device *mdev)
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{
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resource_size_t vram_size = resource_size(mdev->vram_res);
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if (vram_size >= 0x1000000)
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vram_size = vram_size - 0x400000;
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return mgag200_probe_vram(mdev->vram, vram_size);
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}
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struct mga_device *mgag200_g200ew3_device_create(struct pci_dev *pdev,
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const struct drm_driver *drv)
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{
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struct mga_device *mdev;
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struct drm_device *dev;
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resource_size_t vram_available;
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int ret;
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mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base);
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if (IS_ERR(mdev))
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return mdev;
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dev = &mdev->base;
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pci_set_drvdata(pdev, dev);
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ret = mgag200_init_pci_options(pdev, 0x41049120, 0x0000b000);
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if (ret)
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return ERR_PTR(ret);
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ret = mgag200_device_preinit(mdev);
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if (ret)
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return ERR_PTR(ret);
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ret = mgag200_device_init(mdev, &mgag200_g200ew3_device_info,
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&mgag200_g200ew3_device_funcs);
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if (ret)
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return ERR_PTR(ret);
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mgag200_g200ew3_init_registers(mdev);
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vram_available = mgag200_g200ew3_device_probe_vram(mdev);
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ret = mgag200_mode_config_init(mdev, vram_available);
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if (ret)
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return ERR_PTR(ret);
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ret = mgag200_g200ew3_pipeline_init(mdev);
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if (ret)
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return ERR_PTR(ret);
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drm_mode_config_reset(dev);
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return mdev;
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}
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