From patchwork Thu Apr 16 07:40:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Kahola, Mika" X-Patchwork-Id: 6223881 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6A458BF4A6 for ; Thu, 16 Apr 2015 07:41:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5A1DF202E9 for ; Thu, 16 Apr 2015 07:41:17 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 383A120270 for ; Thu, 16 Apr 2015 07:41:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A67CD6E97E; Thu, 16 Apr 2015 00:41:15 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 155A06E97E for ; Thu, 16 Apr 2015 00:41:13 -0700 (PDT) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 16 Apr 2015 00:41:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,586,1422950400"; d="scan'208";a="481639209" Received: from sorvi.fi.intel.com ([10.237.72.165]) by FMSMGA003.fm.intel.com with ESMTP; 16 Apr 2015 00:41:12 -0700 From: Mika Kahola To: intel-gfx@lists.freedesktop.org Date: Thu, 16 Apr 2015 10:40:49 +0300 Message-Id: <1429170058-15158-4-git-send-email-mika.kahola@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1429170058-15158-1-git-send-email-mika.kahola@intel.com> References: <1429170058-15158-1-git-send-email-mika.kahola@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 03/12] drm/i915: Add cdclk extraction for g33, g965gm and g4x X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä Implement cdclk extraction for g33, 965gm and g4x platforms. The details came from configdb. Sadly there isn't anything there for other gen3/gen4 chipsets. So far I've tested this on one ELK where it gave me a HPLL VCO of 5333 MHz and cdclk of 444 MHz which seems perfectly sane for this machine. Signed-off-by: Ville Syrjälä V2: Rebased to the latest Signed-off-by: Mika Kahola Author: Ville Syrjälä --- drivers/gpu/drm/i915/i915_reg.h | 3 + drivers/gpu/drm/i915/intel_display.c | 183 ++++++++++++++++++++++++++++++++++- 2 files changed, 185 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 441bf38..d4cf3bc 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2223,6 +2223,9 @@ enum skl_disp_power_wells { #define CLKCFG_MEM_800 (3 << 4) #define CLKCFG_MEM_MASK (7 << 4) +#define HPLLVCO (MCHBAR_MIRROR_BASE + 0xc38) +#define HPLLVCO_MOBILE (MCHBAR_MIRROR_BASE + 0xc0f) + #define TSC1 0x11001 #define TSE (1<<0) #define TR1 0x11006 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7afde69..ac5031c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6343,6 +6343,175 @@ static int i830_get_display_clock_speed(struct drm_device *dev) return 133333; } +static unsigned int intel_hpll_vco(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + static const unsigned int blb_vco[8] = { + [0] = 3200000, + [1] = 4000000, + [2] = 5333333, + [3] = 4800000, + [4] = 6400000, + }; + static const unsigned int pnv_vco[8] = { + [0] = 3200000, + [1] = 4000000, + [2] = 5333333, + [3] = 4800000, + [4] = 2666667, + }; + static const unsigned int cl_vco[8] = { + [0] = 3200000, + [1] = 4000000, + [2] = 5333333, + [3] = 6400000, + [4] = 3333333, + [5] = 3566667, + [6] = 4266667, + }; + static const unsigned int elk_vco[8] = { + [0] = 3200000, + [1] = 4000000, + [2] = 5333333, + [3] = 4800000, + }; + static const unsigned int ctg_vco[8] = { + [0] = 3200000, + [1] = 4000000, + [2] = 5333333, + [3] = 6400000, + [4] = 2666667, + [5] = 4266667, + }; + const unsigned int *vco_table; + unsigned int vco; + uint8_t tmp = 0; + + /* FIXME other chipsets? */ + if (IS_GM45(dev)) + vco_table = ctg_vco; + else if (IS_G4X(dev)) + vco_table = elk_vco; + else if (IS_CRESTLINE(dev)) + vco_table = cl_vco; + else if (IS_PINEVIEW(dev)) + vco_table = pnv_vco; + else if (IS_G33(dev)) + vco_table = blb_vco; + else + return 0; + + tmp = I915_READ(IS_MOBILE(dev) ? HPLLVCO_MOBILE : HPLLVCO); + + vco = vco_table[tmp & 0x7]; + if (vco == 0) + DRM_ERROR("Bad HPLL VCO (HPLLVCO=0x%02x)\n", tmp); + else + DRM_DEBUG_KMS("HPLL VCO %u kHz\n", vco); + + return vco; +} + +static int gm45_get_display_clock_speed(struct drm_device *dev) +{ + unsigned int cdclk_sel, vco = intel_hpll_vco(dev); + uint16_t tmp = 0; + + pci_read_config_word(dev->pdev, GCFGC, &tmp); + + cdclk_sel = (tmp >> 12) & 0x1; + + switch (vco) { + case 2666667: + case 4000000: + case 5333333: + return cdclk_sel ? 333333 : 222222; + case 3200000: + return cdclk_sel ? 320000 : 228571; + default: + DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n", vco, tmp); + return 222222; + } +} + +static int i965gm_get_display_clock_speed(struct drm_device *dev) +{ + static const uint8_t div_3200[] = { 16, 10, 8 }; + static const uint8_t div_4000[] = { 20, 12, 10 }; + static const uint8_t div_5333[] = { 24, 16, 14 }; + const uint8_t *div_table; + unsigned int cdclk_sel, vco = intel_hpll_vco(dev); + uint16_t tmp = 0; + + pci_read_config_word(dev->pdev, GCFGC, &tmp); + + cdclk_sel = ((tmp >> 8) & 0x1f) - 1; + + if (cdclk_sel >= ARRAY_SIZE(div_3200)) + goto fail; + + switch (vco) { + case 3200000: + div_table = div_3200; + break; + case 4000000: + div_table = div_4000; + break; + case 5333333: + div_table = div_5333; + break; + default: + goto fail; + } + + return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]); + + fail: + DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n", vco, tmp); + return 200000; +} + +static int g33_get_display_clock_speed(struct drm_device *dev) +{ + static const uint8_t div_3200[] = { 12, 10, 8, 7, 5, 16 }; + static const uint8_t div_4000[] = { 14, 12, 10, 8, 6, 20 }; + static const uint8_t div_4800[] = { 20, 14, 12, 10, 8, 24 }; + static const uint8_t div_5333[] = { 20, 16, 12, 12, 8, 28 }; + const uint8_t *div_table; + unsigned int cdclk_sel, vco = intel_hpll_vco(dev); + uint16_t tmp = 0; + + pci_read_config_word(dev->pdev, GCFGC, &tmp); + + cdclk_sel = (tmp >> 4) & 0x7; + + if (cdclk_sel >= ARRAY_SIZE(div_3200)) + goto fail; + + switch (vco) { + case 3200000: + div_table = div_3200; + break; + case 4000000: + div_table = div_4000; + break; + case 4800000: + div_table = div_4800; + break; + case 5333333: + div_table = div_5333; + break; + default: + goto fail; + } + + return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]); + + fail: + DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n", vco, tmp); + return 190476; +} + static void intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den) { @@ -13983,9 +14152,21 @@ static void intel_init_display(struct drm_device *dev) dev_priv->display.get_display_clock_speed = ilk_get_display_clock_speed; else if (IS_I945G(dev) || IS_BROADWATER(dev) || - IS_GEN6(dev) || IS_IVYBRIDGE(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev))) + IS_GEN6(dev) || IS_IVYBRIDGE(dev)) dev_priv->display.get_display_clock_speed = i945_get_display_clock_speed; + else if (IS_GM45(dev)) + dev_priv->display.get_display_clock_speed = + gm45_get_display_clock_speed; + else if (IS_CRESTLINE(dev)) + dev_priv->display.get_display_clock_speed = + i965gm_get_display_clock_speed; + else if (IS_PINEVIEW(dev)) + dev_priv->display.get_display_clock_speed = + pnv_get_display_clock_speed; + else if (IS_G33(dev) || IS_G4X(dev)) + dev_priv->display.get_display_clock_speed = + g33_get_display_clock_speed; else if (IS_I915G(dev)) dev_priv->display.get_display_clock_speed = i915_get_display_clock_speed;