From: Lucas De Marchi <lucas.demarchi@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: fernando.pacheco@intel.com, Matthew Auld <matthew.auld@intel.com>
Subject: [Intel-gfx] [PATCH 14/37] drm/i915/dg1: Initialize RAWCLK properly
Date: Wed, 20 May 2020 17:37:40 -0700 [thread overview]
Message-ID: <20200521003803.18936-15-lucas.demarchi@intel.com> (raw)
In-Reply-To: <20200521003803.18936-1-lucas.demarchi@intel.com>
From: Matt Roper <matthew.d.roper@intel.com>
DG1 always uses a 38.4 MHz rawclk rather and we don't need to read
fuse straps like on CNP+. frequencies on CNP+. Note that register bits
associated with this frequency confusingly use 37 for the divider field
rather than 38 as you might expect.
For simplicity, let's just assume that this 38.4 MHz frequency will hold
true for other future platforms with "fake" PCH south displays and that
the CNP-style behavior will remain for other platforms with a real PCH.
Bspec: 49950
Bspec: 49309
Cc: Aditya Swarup <aditya.swarup@intel.com>
Cc: Clinton Taylor <Clinton.A.Taylor@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
drivers/gpu/drm/i915/display/intel_cdclk.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 9419a4724357..567c36fc9fd7 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2659,6 +2659,19 @@ void intel_update_cdclk(struct drm_i915_private *dev_priv)
DIV_ROUND_UP(dev_priv->cdclk.hw.cdclk, 1000));
}
+static int dg1_rawclk(struct drm_i915_private *i915)
+{
+ /*
+ * DG1 always uses a 38.4 MHz rawclk. The bspec tells us
+ * "Program Numerator=2, Denominator=4, Divider=37 decimal."
+ */
+ intel_de_write(i915, PCH_RAWCLK_FREQ,
+ CNP_RAWCLK_DEN(4) | CNP_RAWCLK_DIV(37) |
+ ICP_RAWCLK_NUM(2));
+
+ return 38400;
+}
+
static int cnp_rawclk(struct drm_i915_private *dev_priv)
{
u32 rawclk;
@@ -2767,6 +2780,8 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv)
{
u32 freq;
+ if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
+ freq = dg1_rawclk(dev_priv);
if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
freq = cnp_rawclk(dev_priv);
else if (HAS_PCH_SPLIT(dev_priv))
--
2.26.2
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next prev parent reply other threads:[~2020-05-21 0:38 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-21 0:37 [Intel-gfx] [PATCH 00/37] Introduce DG1 Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 01/37] drm/i915/rkl: Add DPLL4 support Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 02/37] drm/i915/rkl: Add DDC pin mapping Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 03/37] drm/i915/rkl: Setup ports/phys Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 04/37] drm/i915/rkl: provide port/phy mapping for vbt Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 05/37] drm/i915/rkl: Handle HTI Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 06/37] drm/i915/rkl: Handle comp master/slave relationships for PHYs Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 07/37] drm/i915/rkl: Add initial workarounds Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 08/37] drm/i915: make intel_{uncore, de}_rmw() more useful Lucas De Marchi
2020-05-21 17:24 ` Souza, Jose
2020-05-21 17:30 ` Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 09/37] drm/i915: Add has_master_unit_irq flag Lucas De Marchi
2020-05-26 18:10 ` Souza, Jose
2020-05-21 0:37 ` [Intel-gfx] [PATCH 10/37] drm/i915: add pcie snoop flag Lucas De Marchi
2020-05-21 8:15 ` Chris Wilson
2020-05-21 0:37 ` [Intel-gfx] [PATCH 11/37] drm/i915/dg1: add initial DG-1 definitions Lucas De Marchi
2020-05-26 17:34 ` Souza, Jose
2020-05-26 17:51 ` Lucas De Marchi
2020-05-26 18:02 ` Souza, Jose
2020-05-26 17:51 ` Souza, Jose
2020-05-21 0:37 ` [Intel-gfx] [PATCH 12/37] drm/i915/dg1: Add DG1 PCI IDs Lucas De Marchi
2020-05-26 17:35 ` Souza, Jose
2020-05-21 0:37 ` [Intel-gfx] [PATCH 13/37] drm/i915/dg1: Add fake PCH Lucas De Marchi
2020-05-21 0:37 ` Lucas De Marchi [this message]
2020-05-21 0:37 ` [Intel-gfx] [PATCH 15/37] drm/i915/dg1: Define MOCS table for DG1 Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 16/37] drm/i915/dg1: Add DG1 power wells Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 17/37] drm/i915/dg1: Increase mmio size to 4MB Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 18/37] drm/i915/dg1: add support for the master unit interrupt Lucas De Marchi
2020-05-26 18:02 ` Souza, Jose
2020-05-21 0:37 ` [Intel-gfx] [PATCH 19/37] drm/i915/dg1: Wait for pcode/uncore handshake at startup Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 20/37] drm/i915/dg1: Add DPLL macros for DG1 Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 21/37] drm/i915/dg1: Add and setup DPLLs " Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 22/37] drm/i915/dg1: Enable DPLL " Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 23/37] drm/i915/dg1: add hpd interrupt handling Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 24/37] drm/i915/dg1: invert HPD pins Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 25/37] drm/i915/dg1: gmbus pin mapping Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 26/37] drm/i915/dg1: Handle GRF/IC ECC error irq Lucas De Marchi
2020-05-21 8:19 ` Chris Wilson
2020-05-21 0:37 ` [Intel-gfx] [PATCH 27/37] drm/i915/dg1: Log counter on SLM ECC error Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 28/37] drm/i915/dg1: Enable first 2 ports for DG1 Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 29/37] drm/i915/dg1: Don't program PHY_MISC for PHY-C and PHY-D Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 30/37] drm/i915/dg1: Update comp master/slave relationships for PHYs Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 31/37] drm/i915/dg1: Update voltage swing tables for DP Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 32/37] drm/i915/dg1: provide port/phy mapping for vbt Lucas De Marchi
2020-05-21 0:37 ` [Intel-gfx] [PATCH 33/37] drm/i915/dg1: map/unmap pll clocks Lucas De Marchi
2020-05-21 0:38 ` [Intel-gfx] [PATCH 34/37] drm/i915/dg1: enable PORT C/D aka D/E Lucas De Marchi
2020-05-21 0:38 ` [Intel-gfx] [PATCH 35/37] drm/i915/dg1: Load DMC Lucas De Marchi
2020-05-26 17:42 ` Souza, Jose
2020-05-26 17:49 ` Lucas De Marchi
2020-05-21 0:38 ` [Intel-gfx] [PATCH 36/37] drm/i915/dg1: Add initial DG1 workarounds Lucas De Marchi
2020-05-21 0:38 ` [Intel-gfx] [PATCH 37/37] drm/i915/dg1: Remove SHPD_FILTER_CNT register programming Lucas De Marchi
2020-05-26 17:44 ` Souza, Jose
2020-05-21 1:05 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Introduce DG1 Patchwork
2020-05-21 1:06 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2020-05-21 1:26 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-05-21 18:34 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
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