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drm/radeon: add support pll selection for DCE8 (v4) 

v2: make PPLL0 is available for non-DP on CI
v3: rebase changes, update documentation
v4: fix kabini

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-09-14 11:57:21 -04:00
parent 8542c12b4c
commit 0331f6749e
1 changed files with 47 additions and 1 deletions
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48
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -1621,6 +1621,12 @@ static int radeon_get_shared_nondp_ppll(struct drm_crtc *crtc)
*
* Asic specific PLL information
*
* DCE 8.x
* KB/KV
* - PPLL1, PPLL2 are available for all UNIPHY (both DP and non-DP)
* CI
* - PPLL0, PPLL1, PPLL2 are available for all UNIPHY (both DP and non-DP) and DAC
*
* DCE 6.1
* - PPLL2 is only available to UNIPHYA (both DP and non-DP)
* - PPLL0, PPLL1 are available for UNIPHYB/C/D/E/F (both DP and non-DP)
@ -1647,7 +1653,47 @@ static int radeon_atom_pick_pll(struct drm_crtc *crtc)
u32 pll_in_use;
int pll;
if (ASIC_IS_DCE61(rdev)) {
if (ASIC_IS_DCE8(rdev)) {
if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(radeon_crtc->encoder))) {
if (rdev->clock.dp_extclk)
/* skip PPLL programming if using ext clock */
return ATOM_PPLL_INVALID;
else {
/* use the same PPLL for all DP monitors */
pll = radeon_get_shared_dp_ppll(crtc);
if (pll != ATOM_PPLL_INVALID)
return pll;
}
} else {
/* use the same PPLL for all monitors with the same clock */
pll = radeon_get_shared_nondp_ppll(crtc);
if (pll != ATOM_PPLL_INVALID)
return pll;
}
/* otherwise, pick one of the plls */
if ((rdev->family == CHIP_KAVERI) ||
(rdev->family == CHIP_KABINI)) {
/* KB/KV has PPLL1 and PPLL2 */
pll_in_use = radeon_get_pll_use_mask(crtc);
if (!(pll_in_use & (1 << ATOM_PPLL2)))
return ATOM_PPLL2;
if (!(pll_in_use & (1 << ATOM_PPLL1)))
return ATOM_PPLL1;
DRM_ERROR("unable to allocate a PPLL\n");
return ATOM_PPLL_INVALID;
} else {
/* CI has PPLL0, PPLL1, and PPLL2 */
pll_in_use = radeon_get_pll_use_mask(crtc);
if (!(pll_in_use & (1 << ATOM_PPLL2)))
return ATOM_PPLL2;
if (!(pll_in_use & (1 << ATOM_PPLL1)))
return ATOM_PPLL1;
if (!(pll_in_use & (1 << ATOM_PPLL0)))
return ATOM_PPLL0;
DRM_ERROR("unable to allocate a PPLL\n");
return ATOM_PPLL_INVALID;
}
} else if (ASIC_IS_DCE61(rdev)) {
struct radeon_encoder_atom_dig *dig =
radeon_encoder->enc_priv;