[Intel-gfx] [PATCH 1/4] drm/i915/hti: abstract hti handling
Jani Nikula
jani.nikula at intel.com
Wed Nov 9 14:42:06 UTC 2022
The HTI or HDPORT handling is sprinkled around. Centralize to one place.
Add a note about how subtle the mapping from HDPORT_STATE register to
dpll mask actually is.
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_ddi.c | 9 +----
drivers/gpu/drm/i915/display/intel_display.c | 8 +---
drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 11 +-----
drivers/gpu/drm/i915/display/intel_hti.c | 39 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_hti.h | 18 +++++++++
drivers/gpu/drm/i915/display/intel_hti_regs.h | 16 ++++++++
drivers/gpu/drm/i915/i915_reg.h | 5 ---
8 files changed, 80 insertions(+), 27 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_hti.c
create mode 100644 drivers/gpu/drm/i915/display/intel_hti.h
create mode 100644 drivers/gpu/drm/i915/display/intel_hti_regs.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 51704b54317c..cb8232bd315b 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -247,6 +247,7 @@ i915-y += \
display/intel_global_state.o \
display/intel_hdcp.o \
display/intel_hotplug.o \
+ display/intel_hti.o \
display/intel_lpe_audio.o \
display/intel_modeset_verify.o \
display/intel_modeset_setup.o \
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index e95bde5cf060..5be9573bf65c 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -56,6 +56,7 @@
#include "intel_hdcp.h"
#include "intel_hdmi.h"
#include "intel_hotplug.h"
+#include "intel_hti.h"
#include "intel_lspcon.h"
#include "intel_mg_phy_regs.h"
#include "intel_pps.h"
@@ -4113,12 +4114,6 @@ intel_ddi_max_lanes(struct intel_digital_port *dig_port)
return max_lanes;
}
-static bool hti_uses_phy(struct drm_i915_private *i915, enum phy phy)
-{
- return i915->hti_state & HDPORT_ENABLED &&
- i915->hti_state & HDPORT_DDI_USED(phy);
-}
-
static enum hpd_pin xelpd_hpd_pin(struct drm_i915_private *dev_priv,
enum port port)
{
@@ -4247,7 +4242,7 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
* driver. In that case we should skip initializing the corresponding
* outputs.
*/
- if (hti_uses_phy(dev_priv, phy)) {
+ if (intel_hti_uses_phy(dev_priv, phy)) {
drm_dbg_kms(&dev_priv->drm, "PORT %c / PHY %c reserved by HTI\n",
port_name(port), phy_name(phy));
return;
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 0d3353c403af..90219e7abc7c 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -100,6 +100,7 @@
#include "intel_frontbuffer.h"
#include "intel_hdcp.h"
#include "intel_hotplug.h"
+#include "intel_hti.h"
#include "intel_modeset_verify.h"
#include "intel_modeset_setup.h"
#include "intel_overlay.h"
@@ -8735,12 +8736,7 @@ int intel_modeset_init_nogem(struct drm_i915_private *i915)
if (i915->display.cdclk.max_cdclk_freq == 0)
intel_update_max_cdclk(i915);
- /*
- * If the platform has HTI, we need to find out whether it has reserved
- * any display resources before we create our display outputs.
- */
- if (INTEL_INFO(i915)->display.has_hti)
- i915->hti_state = intel_de_read(i915, HDPORT_STATE);
+ intel_hti_init(i915);
/* Just disable it once at startup */
intel_vga_disable(i915);
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
index 7c6c094a0a01..28f7dcb170c7 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -30,6 +30,7 @@
#include "intel_dpio_phy.h"
#include "intel_dpll.h"
#include "intel_dpll_mgr.h"
+#include "intel_hti.h"
#include "intel_mg_phy_regs.h"
#include "intel_pch_refclk.h"
#include "intel_tc.h"
@@ -3163,14 +3164,6 @@ static void icl_update_active_dpll(struct intel_atomic_state *state,
icl_set_active_port_dpll(crtc_state, port_dpll_id);
}
-static u32 intel_get_hti_plls(struct drm_i915_private *i915)
-{
- if (!(i915->hti_state & HDPORT_ENABLED))
- return 0;
-
- return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, i915->hti_state);
-}
-
static int icl_compute_combo_phy_dpll(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
@@ -3245,7 +3238,7 @@ static int icl_get_combo_phy_dpll(struct intel_atomic_state *state,
}
/* Eliminate DPLLs from consideration if reserved by HTI */
- dpll_mask &= ~intel_get_hti_plls(dev_priv);
+ dpll_mask &= ~intel_hti_dpll_mask(dev_priv);
port_dpll->pll = intel_find_shared_dpll(state, crtc,
&port_dpll->hw_state,
diff --git a/drivers/gpu/drm/i915/display/intel_hti.c b/drivers/gpu/drm/i915/display/intel_hti.c
new file mode 100644
index 000000000000..e2b09e96f9a9
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hti.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "intel_de.h"
+#include "intel_display.h"
+#include "intel_hti.h"
+#include "intel_hti_regs.h"
+
+void intel_hti_init(struct drm_i915_private *i915)
+{
+ /*
+ * If the platform has HTI, we need to find out whether it has reserved
+ * any display resources before we create our display outputs.
+ */
+ if (INTEL_INFO(i915)->display.has_hti)
+ i915->hti_state = intel_de_read(i915, HDPORT_STATE);
+}
+
+bool intel_hti_uses_phy(struct drm_i915_private *i915, enum phy phy)
+{
+ return i915->hti_state & HDPORT_ENABLED &&
+ i915->hti_state & HDPORT_DDI_USED(phy);
+}
+
+u32 intel_hti_dpll_mask(struct drm_i915_private *i915)
+{
+ if (!(i915->hti_state & HDPORT_ENABLED))
+ return 0;
+
+ /*
+ * Note: This is subtle. The values must coincide with what's defined
+ * for the platform.
+ */
+ return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, i915->hti_state);
+}
+
diff --git a/drivers/gpu/drm/i915/display/intel_hti.h b/drivers/gpu/drm/i915/display/intel_hti.h
new file mode 100644
index 000000000000..2893d6668657
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hti.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __INTEL_HTI_H__
+#define __INTEL_HTI_H__
+
+#include <linux/types.h>
+
+struct drm_i915_private;
+enum phy;
+
+void intel_hti_init(struct drm_i915_private *i915);
+bool intel_hti_uses_phy(struct drm_i915_private *i915, enum phy phy);
+u32 intel_hti_dpll_mask(struct drm_i915_private *i915);
+
+#endif /* __INTEL_HTI_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_hti_regs.h b/drivers/gpu/drm/i915/display/intel_hti_regs.h
new file mode 100644
index 000000000000..e206f2837fc8
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hti_regs.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __INTEL_HTI_REGS_H__
+#define __INTEL_HTI_REGS_H__
+
+#include "i915_reg_defs.h"
+
+#define HDPORT_STATE _MMIO(0x45050)
+#define HDPORT_DPLL_USED_MASK REG_GENMASK(15, 12)
+#define HDPORT_DDI_USED(phy) REG_BIT(2 * (phy) + 1)
+#define HDPORT_ENABLED REG_BIT(0)
+
+#endif /* __INTEL_HTI_REGS_H__ */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a37ed0c61f20..fd60d335d9cb 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1148,11 +1148,6 @@
#define MBUS_JOIN_PIPE_SELECT(pipe) REG_FIELD_PREP(MBUS_JOIN_PIPE_SELECT_MASK, pipe)
#define MBUS_JOIN_PIPE_SELECT_NONE MBUS_JOIN_PIPE_SELECT(7)
-#define HDPORT_STATE _MMIO(0x45050)
-#define HDPORT_DPLL_USED_MASK REG_GENMASK(15, 12)
-#define HDPORT_DDI_USED(phy) REG_BIT(2 * (phy) + 1)
-#define HDPORT_ENABLED REG_BIT(0)
-
/* Make render/texture TLB fetches lower priorty than associated data
* fetches. This is not turned on by default
*/
--
2.34.1
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