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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/pci.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_g200eh3_pixpllc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *new_state)
{
static const unsigned int vcomax = 3000000;
static const unsigned int vcomin = 1500000;
static const unsigned int pllreffreq = 25000;
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 int delta, tmpdelta;
unsigned int testp, testm, testn;
unsigned int p, m, n, s;
unsigned int computed;
m = n = p = s = 0;
delta = 0xffffffff;
testp = 0;
for (testm = 150; testm >= 6; testm--) {
if (clock * testm > vcomax)
continue;
if (clock * testm < vcomin)
continue;
for (testn = 120; testn >= 60; testn--) {
computed = (pllreffreq * testn) / testm;
if (computed > clock)
tmpdelta = computed - clock;
else
tmpdelta = clock - computed;
if (tmpdelta < delta) {
delta = tmpdelta;
n = testn + 1;
m = testm + 1;
p = testp + 1;
}
if (delta == 0)
break;
}
if (delta == 0)
break;
}
pixpllc->m = m;
pixpllc->n = n;
pixpllc->p = p;
pixpllc->s = s;
return 0;
}
/*
* Mode-setting pipeline
*/
static const struct drm_plane_helper_funcs mgag200_g200eh3_primary_plane_helper_funcs = {
MGAG200_PRIMARY_PLANE_HELPER_FUNCS,
};
static const struct drm_plane_funcs mgag200_g200eh3_primary_plane_funcs = {
MGAG200_PRIMARY_PLANE_FUNCS,
};
static const struct drm_crtc_helper_funcs mgag200_g200eh3_crtc_helper_funcs = {
MGAG200_CRTC_HELPER_FUNCS,
};
static const struct drm_crtc_funcs mgag200_g200eh3_crtc_funcs = {
MGAG200_CRTC_FUNCS,
};
static const struct drm_encoder_funcs mgag200_g200eh3_dac_encoder_funcs = {
MGAG200_DAC_ENCODER_FUNCS,
};
static const struct drm_connector_helper_funcs mgag200_g200eh3_vga_connector_helper_funcs = {
MGAG200_VGA_CONNECTOR_HELPER_FUNCS,
};
static const struct drm_connector_funcs mgag200_g200eh3_vga_connector_funcs = {
MGAG200_VGA_CONNECTOR_FUNCS,
};
static int mgag200_g200eh3_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;
struct drm_encoder *encoder = &mdev->encoder;
struct mga_i2c_chan *i2c = &mdev->i2c;
struct drm_connector *connector = &mdev->connector;
int ret;
ret = drm_universal_plane_init(dev, primary_plane, 0,
&mgag200_g200eh3_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_g200eh3_primary_plane_helper_funcs);
drm_plane_enable_fb_damage_clips(primary_plane);
ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
&mgag200_g200eh3_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_g200eh3_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);
encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drm_encoder_init(dev, encoder, &mgag200_g200eh3_dac_encoder_funcs,
DRM_MODE_ENCODER_DAC, NULL);
if (ret) {
drm_err(dev, "drm_encoder_init() failed: %d\n", ret);
return ret;
}
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,
&mgag200_g200eh3_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, &mgag200_g200eh3_vga_connector_helper_funcs);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret) {
drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret);
return ret;
}
return 0;
}
/*
* DRM device
*/
static const struct mgag200_device_info mgag200_g200eh3_device_info =
MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false);
static const struct mgag200_device_funcs mgag200_g200eh3_device_funcs = {
.pixpllc_atomic_check = mgag200_g200eh3_pixpllc_atomic_check,
.pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH
};
struct mga_device *mgag200_g200eh3_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_g200eh3_device_info,
&mgag200_g200eh3_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_g200eh3_pipeline_init(mdev);
if (ret)
return ERR_PTR(ret);
drm_mode_config_reset(dev);
return mdev;
}
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