diff options
| author | Manasi Navare <manasi.d.navare@intel.com> | 2018-08-18 00:52:08 +0300 |
|---|---|---|
| committer | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2018-08-21 00:37:00 +0300 |
| commit | bcaad532974eb47f1fb4ee04ede9812107060245 (patch) | |
| tree | 865cf25bd35209146e592ed3a30e18f10e80e315 /drivers/gpu/drm/i915/intel_dpll_mgr.c | |
| parent | 35a5fd9ebfa93758ca579e30f337b6c9126d995b (diff) | |
| download | linux-bcaad532974eb47f1fb4ee04ede9812107060245.tar.xz | |
drm/i915/icl: Implement HSDIV_RATIO of MG_CLKTOP2_HSCLKCTL_PORT reg as separate divider value defines
The register value of Divider Ratio for high speed divider
(hsdiv_ratio) in MG_CLKTOP2_HSCLKCTL_PORT register is not same as the
actual numerical value of the divider. So this patch implements
separate divider value defines for that field.
icl_mg_pll_find_divisors() can use these defines instead of magic
register values.
The new defines are going to be used in the next patch.
v2 (from Paulo):
* Rebase.
* Make it look a little more like the rest of our code.
v3 (from Paulo):
* Make hsdiv u32 now that it's a bit field (José).
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Suggested-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180817215209.29133-1-paulo.r.zanoni@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dpll_mgr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dpll_mgr.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c index 20c90688a48a..04d41bc1a4bb 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c @@ -2643,7 +2643,8 @@ static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc, for (div2 = 10; div2 > 0; div2--) { int dco = div1 * div2 * clock_khz * 5; - int a_divratio, tlinedrv, inputsel, hsdiv; + int a_divratio, tlinedrv, inputsel; + u32 hsdiv; if (dco < dco_min_freq || dco > dco_max_freq) continue; @@ -2662,16 +2663,16 @@ static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc, MISSING_CASE(div1); /* fall through */ case 2: - hsdiv = 0; + hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2; break; case 3: - hsdiv = 1; + hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_3; break; case 5: - hsdiv = 2; + hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_5; break; case 7: - hsdiv = 3; + hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_7; break; } @@ -2685,7 +2686,7 @@ static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc, state->mg_clktop2_hsclkctl = MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL(tlinedrv) | MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL(inputsel) | - MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO(hsdiv) | + hsdiv | MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO(div2); return true; |