redonkable/alistair23-linux
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drm/nv20: Use the nv30 CRTC bandwidth calculation code.

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nv2x CRTC FIFOs are as large as in nv3x (4kB it seems), and the FIFO
control registers have the same layout: we can make them share the
same implementation.

Previously we were using the nv1x code, but the calculated FIFO
watermarks are usually too low for nv2x and they cause horrible
scanout artifacts. They've gone unnoticed until now because we've been
leaving one of the bandwidth regs uninitialized (CRE 47, which
contains the most significant bits of FFLWM), so everything seemed to
work fine except in some cases after a cold boot, depending on the
memory bandwidth and pixel clocks used.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-08-26 23:07:02 +02:00 committed by Ben Skeggs
parent 316f60a120
commit 4295f188e8
3 changed files with 10 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/gpu/drm/nouveau/nouveau_calc.c
View file

@ -234,7 +234,7 @@ nv04_update_arb(struct drm_device *dev, int VClk, int bpp,
}
static void
nv30_update_arb(int *burst, int *lwm)
nv20_update_arb(int *burst, int *lwm)
{
unsigned int fifo_size, burst_size, graphics_lwm;
@ -251,14 +251,14 @@ nouveau_calc_arb(struct drm_device *dev, int vclk, int bpp, int *burst, int *lwm
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
if (dev_priv->card_type < NV_30)
if (dev_priv->card_type < NV_20)
nv04_update_arb(dev, vclk, bpp, burst, lwm);
else if ((dev->pci_device & 0xfff0) == 0x0240 /*CHIPSET_C51*/ ||
(dev->pci_device & 0xfff0) == 0x03d0 /*CHIPSET_C512*/) {
*burst = 128;
*lwm = 0x0480;
} else
nv30_update_arb(burst, lwm);
nv20_update_arb(burst, lwm);
}
static int

10
drivers/gpu/drm/nouveau/nouveau_hw.c
View file

@ -866,10 +866,11 @@ nv_save_state_ext(struct drm_device *dev, int head,
rd_cio_state(dev, head, regp, NV_CIO_CRE_FFLWM__INDEX);
rd_cio_state(dev, head, regp, NV_CIO_CRE_21);
if (dev_priv->card_type >= NV_30) {
if (dev_priv->card_type >= NV_20)
rd_cio_state(dev, head, regp, NV_CIO_CRE_47);
if (dev_priv->card_type >= NV_30)
rd_cio_state(dev, head, regp, 0x9f);
}
rd_cio_state(dev, head, regp, NV_CIO_CRE_49);
rd_cio_state(dev, head, regp, NV_CIO_CRE_HCUR_ADDR0_INDEX);
@ -976,10 +977,11 @@ nv_load_state_ext(struct drm_device *dev, int head,
wr_cio_state(dev, head, regp, NV_CIO_CRE_FF_INDEX);
wr_cio_state(dev, head, regp, NV_CIO_CRE_FFLWM__INDEX);
if (dev_priv->card_type >= NV_30) {
if (dev_priv->card_type >= NV_20)
wr_cio_state(dev, head, regp, NV_CIO_CRE_47);
if (dev_priv->card_type >= NV_30)
wr_cio_state(dev, head, regp, 0x9f);
}
wr_cio_state(dev, head, regp, NV_CIO_CRE_49);
wr_cio_state(dev, head, regp, NV_CIO_CRE_HCUR_ADDR0_INDEX);

2
drivers/gpu/drm/nouveau/nv04_crtc.c
View file

@ -826,7 +826,7 @@ nv04_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_FF_INDEX);
crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_FFLWM__INDEX);
if (dev_priv->card_type >= NV_30) {
if (dev_priv->card_type >= NV_20) {
regp->CRTC[NV_CIO_CRE_47] = arb_lwm >> 8;
crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_47);
}