From bcaad532974eb47f1fb4ee04ede9812107060245 Mon Sep 17 00:00:00 2001 From: Manasi Navare Date: Fri, 17 Aug 2018 14:52:08 -0700 Subject: [PATCH] drm/i915/icl: Implement HSDIV_RATIO of MG_CLKTOP2_HSCLKCTL_PORT reg as separate divider value defines MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: José Roberto de Souza Suggested-by: James Ausmus Signed-off-by: Manasi Navare Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180817215209.29133-1-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/i915_reg.h | 5 ++++- drivers/gpu/drm/i915/intel_dpll_mgr.c | 13 +++++++------ 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5121b9f072c6..8d3a7fe44d66 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9391,8 +9391,11 @@ enum skl_power_gate { #define MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK (0x1 << 16) #define MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL(x) ((x) << 14) #define MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK (0x3 << 14) -#define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO(x) ((x) << 12) #define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK (0x3 << 12) +#define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2 (0 << 12) +#define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_3 (1 << 12) +#define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_5 (2 << 12) +#define MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_7 (3 << 12) #define MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO(x) ((x) << 8) #define MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK (0xf << 8) #define MG_CLKTOP2_HSCLKCTL(port) _MMIO_PORT((port) - PORT_C, \ 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; -- 2.30.2