// 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 <drm/drm_vblank.h>
#include "mgag200_drv.h"
static void mgag200_g200ew3_init_registers(struct mga_device *mdev)
{
mgag200_g200wb_init_registers(mdev); // same as G200WB
WREG_ECRT(0x34, 0x5); // G200EW3 specific
}
/*
* PIXPLLC
*/
static int mgag200_g200ew3_pixpllc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *new_state)
{
static const unsigned int vcomax = 800000;
static const unsigned int vcomin = 400000;
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, testp2;
unsigned int p, m, n, s;
unsigned int computed;
m = n = p = s = 0;
delta = 0xffffffff;
for (testp = 1; testp < 8; testp++) {
for (testp2 = 1; testp2 < 8; testp2++) {
if (testp < testp2)
continue;
if ((clock * testp * testp2) > vcomax)
continue;
if ((clock * testp * testp2) < vcomin)
continue;
for (testm = 1; testm < 26; testm++) {
for (testn = 32; testn < 2048 ; testn++) {
computed = (pllreffreq * testn) / (testm * testp * testp2);
if (computed > clock)
tmpdelta = computed - clock;
else
tmpdelta = clock - computed;
if (tmpdelta < delta) {
delta = tmpdelta;
m = testm + 1;
n = testn + 1;
p = testp + 1;
s = testp2;
}
}
}
}
}
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_g200ew3_primary_plane_helper_funcs = {
MGAG200_PRIMARY_PLANE_HELPER_FUNCS,
};
static const struct drm_plane_funcs mgag200_g200ew3_primary_plane_funcs = {
MGAG200_PRIMARY_PLANE_FUNCS,
};
static const struct drm_crtc_helper_funcs mgag200_g200ew3_crtc_helper_funcs = {
MGAG200_CRTC_HELPER_FUNCS,
};
static const struct drm_crtc_funcs mgag200_g200ew3_crtc_funcs = {
MGAG200_CRTC_FUNCS,
};
static int mgag200_g200ew3_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_g200ew3_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_g200ew3_primary_plane_helper_funcs);
drm_plane_enable_fb_damage_clips(primary_plane);
ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
&mgag200_g200ew3_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_g200ew3_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_g200ew3_device_info =
MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, true, 0, 1, false);
static const struct mgag200_device_funcs mgag200_g200ew3_device_funcs = {
.pixpllc_atomic_check = mgag200_g200ew3_pixpllc_atomic_check,
.pixpllc_atomic_update = mgag200_g200wb_pixpllc_atomic_update, // same as G200WB
};
static resource_size_t mgag200_g200ew3_device_probe_vram(struct mga_device *mdev)
{
resource_size_t vram_size = resource_size(mdev->vram_res);
if (vram_size >= 0x1000000)
vram_size = vram_size - 0x400000;
return mgag200_probe_vram(mdev->vram, vram_size);
}
struct mga_device *mgag200_g200ew3_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, 0x41049120, 0x0000b000);
if (ret)
return ERR_PTR(ret);
ret = mgag200_device_preinit(mdev);
if (ret)
return ERR_PTR(ret);
ret = mgag200_device_init(mdev, &mgag200_g200ew3_device_info,
&mgag200_g200ew3_device_funcs);
if (ret)
return ERR_PTR(ret);
mgag200_g200ew3_init_registers(mdev);
vram_available = mgag200_g200ew3_device_probe_vram(mdev);
ret = mgag200_mode_config_init(mdev, vram_available);
if (ret)
return ERR_PTR(ret);
ret = mgag200_g200ew3_pipeline_init(mdev);
if (ret)
return ERR_PTR(ret);
drm_mode_config_reset(dev);
drm_kms_helper_poll_init(dev);
ret = drm_vblank_init(dev, 1);
if (ret)
return ERR_PTR(ret);
return mdev;
}
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