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drm/radeon: Fix num_banks calculation for SI 

The way the tile mode array index was calculated only makes sense for
the CIK specific macrotile mode array. For SI, we need to use one of the
tile mode array indices reserved for displayable surfaces.

This happened to result in correct display most if not all of the time
because most of the SI tiling modes use the same number of banks.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by:  Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Michel Dänzer 2014-04-22 16:53:52 +09:00 committed by Christian König
parent aa019b791a
commit e9d14aeb30
1 changed files with 31 additions and 15 deletions
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46
drivers/gpu/drm/radeon/atombios_crtc.c
View File

@ -1177,27 +1177,43 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
/* Set NUM_BANKS. */
if (rdev->family >= CHIP_TAHITI) {
unsigned tileb, index, num_banks, tile_split_bytes;
unsigned index, num_banks;
/* Calculate the macrotile mode index. */
tile_split_bytes = 64 << tile_split;
tileb = 8 * 8 * target_fb->bits_per_pixel / 8;
tileb = min(tile_split_bytes, tileb);
if (rdev->family >= CHIP_BONAIRE) {
unsigned tileb, tile_split_bytes;
for (index = 0; tileb > 64; index++) {
tileb >>= 1;
}
/* Calculate the macrotile mode index. */
tile_split_bytes = 64 << tile_split;
tileb = 8 * 8 * target_fb->bits_per_pixel / 8;
tileb = min(tile_split_bytes, tileb);
if (index >= 16) {
DRM_ERROR("Wrong screen bpp (%u) or tile split (%u)\n",
target_fb->bits_per_pixel, tile_split);
return -EINVAL;
}
for (index = 0; tileb > 64; index++)
tileb >>= 1;
if (index >= 16) {
DRM_ERROR("Wrong screen bpp (%u) or tile split (%u)\n",
target_fb->bits_per_pixel, tile_split);
return -EINVAL;
}
if (rdev->family >= CHIP_BONAIRE)
num_banks = (rdev->config.cik.macrotile_mode_array[index] >> 6) & 0x3;
else
} else {
switch (target_fb->bits_per_pixel) {
case 8:
index = 10;
break;
case 16:
index = SI_TILE_MODE_COLOR_2D_SCANOUT_16BPP;
break;
default:
case 32:
index = SI_TILE_MODE_COLOR_2D_SCANOUT_32BPP;
break;
}
num_banks = (rdev->config.si.tile_mode_array[index] >> 20) & 0x3;
}
fb_format |= EVERGREEN_GRPH_NUM_BANKS(num_banks);
} else {
/* NI and older. */