From 70332ac539c5c5dffede580fe8986dcfc0751d55 Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@intel.com>
Date: Thu, 1 Nov 2018 16:04:27 +0200
Subject: drm/i915/icl+: Sanitize port to PLL mapping
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Git-commit: 70332ac539c5c5dffede580fe8986dcfc0751d55
Patch-mainline: v5.0-rc1
References: fate#326289
BIOS can leave the PLL to port mapping enabled, even if the
corresponding encoder is disabled. Disable the port mapping in this
case.
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101140427.31026-9-imre.deak@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/intel_ddi.c | 23 +++++++++++++++++++++++
drivers/gpu/drm/i915/intel_display.c | 4 ++++
drivers/gpu/drm/i915/intel_drv.h | 1 +
3 files changed, 28 insertions(+)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2815,6 +2815,29 @@ void icl_unmap_plls_to_ports(struct drm_
}
}
+void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ u32 val = I915_READ(DPCLKA_CFGCR0_ICL);
+ enum port port = encoder->port;
+ bool clk_enabled = !(val & icl_dpclka_cfgcr0_clk_off(dev_priv, port));
+
+ if (clk_enabled == !!encoder->base.crtc)
+ return;
+
+ /*
+ * Punt on the case now where clock is disabled, but the encoder is
+ * enabled, something else is really broken then.
+ */
+ if (WARN_ON(!clk_enabled))
+ return;
+
+ DRM_NOTE("Port %c is disabled but it has a mapped PLL, unmap it\n",
+ port_name(port));
+ val |= icl_dpclka_cfgcr0_clk_off(dev_priv, port);
+ I915_WRITE(DPCLKA_CFGCR0_ICL, val);
+}
+
static void intel_ddi_clk_select(struct intel_encoder *encoder,
const struct intel_shared_dpll *pll)
{
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15536,6 +15536,7 @@ static void intel_sanitize_crtc(struct i
static void intel_sanitize_encoder(struct intel_encoder *encoder)
{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_connector *connector;
/* We need to check both for a crtc link (meaning that the
@@ -15576,6 +15577,9 @@ static void intel_sanitize_encoder(struc
/* notify opregion of the sanitized encoder state */
intel_opregion_notify_encoder(encoder, connector && has_active_crtc);
+
+ if (INTEL_GEN(dev_priv) >= 11)
+ icl_sanitize_encoder_pll_mapping(encoder);
}
void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1435,6 +1435,7 @@ void icl_map_plls_to_ports(struct drm_cr
void icl_unmap_plls_to_ports(struct drm_crtc *crtc,
struct intel_crtc_state *crtc_state,
struct drm_atomic_state *old_state);
+void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder);
unsigned int intel_fb_align_height(const struct drm_framebuffer *fb,
int plane, unsigned int height);