Move the MSO related helper functions from intel_ddi.c to a new file
intel_dss.c to improve code modularity and maintainability.
The corresponding headers are also moved to intel_dss.h.
v2: Retain the old naming scheme for the functions and only add dss
prefix. (Jani)
v3: Remove extra line at the end of header file.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_ddi.c | 86 ++---------------------
drivers/gpu/drm/i915/display/intel_dss.c | 87 ++++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_dss.h | 20 ++++++
drivers/gpu/drm/xe/Makefile | 1 +
5 files changed, 114 insertions(+), 81 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_dss.c
create mode 100644 drivers/gpu/drm/i915/display/intel_dss.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index c63fa2133ccb..e55ce8ba123c 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -328,6 +328,7 @@ i915-y += \
display/intel_dsi.o \
display/intel_dsi_dcs_backlight.o \
display/intel_dsi_vbt.o \
+ display/intel_dss.o \
display/intel_dvo.o \
display/intel_encoder.o \
display/intel_gmbus.o \
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4566a60c981c..7cc766043a5b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -57,7 +57,7 @@
#include "intel_dp_tunnel.h"
#include "intel_dpio_phy.h"
#include "intel_dsi.h"
-#include "intel_dss_regs.h"
+#include "intel_dss.h"
#include "intel_encoder.h"
#include "intel_fdi.h"
#include "intel_fifo_underrun.h"
@@ -2349,82 +2349,6 @@ static void intel_ddi_power_up_lanes(struct intel_encoder *encoder,
}
}
-/*
- * Splitter enable for eDP MSO is limited to certain pipes, on certain
- * platforms.
- */
-static u8 intel_ddi_splitter_pipe_mask(struct drm_i915_private *i915)
-{
- if (DISPLAY_VER(i915) > 20)
- return ~0;
- else if (IS_ALDERLAKE_P(i915))
- return BIT(PIPE_A) | BIT(PIPE_B);
- else
- return BIT(PIPE_A);
-}
-
-static void intel_ddi_mso_get_config(struct intel_encoder *encoder,
- struct intel_crtc_state *pipe_config)
-{
- struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
- struct drm_i915_private *i915 = to_i915(crtc->base.dev);
- enum pipe pipe = crtc->pipe;
- u32 dss1;
-
- if (!HAS_MSO(i915))
- return;
-
- dss1 = intel_de_read(i915, ICL_PIPE_DSS_CTL1(pipe));
-
- pipe_config->splitter.enable = dss1 & SPLITTER_ENABLE;
- if (!pipe_config->splitter.enable)
- return;
-
- if (drm_WARN_ON(&i915->drm, !(intel_ddi_splitter_pipe_mask(i915) & BIT(pipe)))) {
- pipe_config->splitter.enable = false;
- return;
- }
-
- switch (dss1 & SPLITTER_CONFIGURATION_MASK) {
- default:
- drm_WARN(&i915->drm, true,
- "Invalid splitter configuration, dss1=0x%08x\n", dss1);
- fallthrough;
- case SPLITTER_CONFIGURATION_2_SEGMENT:
- pipe_config->splitter.link_count = 2;
- break;
- case SPLITTER_CONFIGURATION_4_SEGMENT:
- pipe_config->splitter.link_count = 4;
- break;
- }
-
- pipe_config->splitter.pixel_overlap = REG_FIELD_GET(OVERLAP_PIXELS_MASK, dss1);
-}
-
-static void intel_ddi_mso_configure(const struct intel_crtc_state *crtc_state)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_i915_private *i915 = to_i915(crtc->base.dev);
- enum pipe pipe = crtc->pipe;
- u32 dss1 = 0;
-
- if (!HAS_MSO(i915))
- return;
-
- if (crtc_state->splitter.enable) {
- dss1 |= SPLITTER_ENABLE;
- dss1 |= OVERLAP_PIXELS(crtc_state->splitter.pixel_overlap);
- if (crtc_state->splitter.link_count == 2)
- dss1 |= SPLITTER_CONFIGURATION_2_SEGMENT;
- else
- dss1 |= SPLITTER_CONFIGURATION_4_SEGMENT;
- }
-
- intel_de_rmw(i915, ICL_PIPE_DSS_CTL1(pipe),
- SPLITTER_ENABLE | SPLITTER_CONFIGURATION_MASK |
- OVERLAP_PIXELS_MASK, dss1);
-}
-
static u8 mtl_get_port_width(u8 lane_count)
{
switch (lane_count) {
@@ -2559,7 +2483,7 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state,
/*
* 6.e Program CoG/MSO configuration bits in DSS_CTL1 if selected.
*/
- intel_ddi_mso_configure(crtc_state);
+ intel_dss_mso_configure(crtc_state);
if (!is_mst)
intel_dp_set_power(intel_dp, DP_SET_POWER_D0);
@@ -2714,7 +2638,7 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state,
/*
* 7.g Program CoG/MSO configuration bits in DSS_CTL1 if selected.
*/
- intel_ddi_mso_configure(crtc_state);
+ intel_dss_mso_configure(crtc_state);
if (!is_mst)
intel_dp_set_power(intel_dp, DP_SET_POWER_D0);
@@ -3959,7 +3883,7 @@ static void intel_ddi_get_config(struct intel_encoder *encoder,
intel_ddi_read_func_ctl(encoder, pipe_config);
- intel_ddi_mso_get_config(encoder, pipe_config);
+ intel_dss_mso_get_config(encoder, pipe_config);
pipe_config->has_audio =
intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder);
@@ -5191,7 +5115,7 @@ void intel_ddi_init(struct intel_display *display,
dig_port->hpd_pulse = intel_dp_hpd_pulse;
if (dig_port->dp.mso_link_count)
- encoder->pipe_mask = intel_ddi_splitter_pipe_mask(dev_priv);
+ encoder->pipe_mask = intel_dss_mso_pipe_mask(dev_priv);
}
/*
diff --git a/drivers/gpu/drm/i915/display/intel_dss.c b/drivers/gpu/drm/i915/display/intel_dss.c
new file mode 100644
index 000000000000..e774f55f7008
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dss.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "i915_reg_defs.h"
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_dss.h"
+#include "intel_dss_regs.h"
+
+/*
+ * Splitter enable for eDP MSO is limited to certain pipes, on certain
+ * platforms.
+ */
+u8 intel_dss_mso_pipe_mask(struct drm_i915_private *i915)
+{
+ if (DISPLAY_VER(i915) > 20)
+ return ~0;
+ else if (IS_ALDERLAKE_P(i915))
+ return BIT(PIPE_A) | BIT(PIPE_B);
+ else
+ return BIT(PIPE_A);
+}
+
+void intel_dss_mso_get_config(struct intel_encoder *encoder,
+ struct intel_crtc_state *pipe_config)
+{
+ struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ u32 dss1;
+
+ if (!HAS_MSO(i915))
+ return;
+
+ dss1 = intel_de_read(i915, ICL_PIPE_DSS_CTL1(pipe));
+
+ pipe_config->splitter.enable = dss1 & SPLITTER_ENABLE;
+ if (!pipe_config->splitter.enable)
+ return;
+
+ if (drm_WARN_ON(&i915->drm, !(intel_dss_mso_pipe_mask(i915) & BIT(pipe)))) {
+ pipe_config->splitter.enable = false;
+ return;
+ }
+
+ switch (dss1 & SPLITTER_CONFIGURATION_MASK) {
+ default:
+ drm_WARN(&i915->drm, true,
+ "Invalid splitter configuration, dss1=0x%08x\n", dss1);
+ fallthrough;
+ case SPLITTER_CONFIGURATION_2_SEGMENT:
+ pipe_config->splitter.link_count = 2;
+ break;
+ case SPLITTER_CONFIGURATION_4_SEGMENT:
+ pipe_config->splitter.link_count = 4;
+ break;
+ }
+
+ pipe_config->splitter.pixel_overlap = REG_FIELD_GET(OVERLAP_PIXELS_MASK, dss1);
+}
+
+void intel_dss_mso_configure(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ u32 dss1 = 0;
+
+ if (!HAS_MSO(i915))
+ return;
+
+ if (crtc_state->splitter.enable) {
+ dss1 |= SPLITTER_ENABLE;
+ dss1 |= OVERLAP_PIXELS(crtc_state->splitter.pixel_overlap);
+ if (crtc_state->splitter.link_count == 2)
+ dss1 |= SPLITTER_CONFIGURATION_2_SEGMENT;
+ else
+ dss1 |= SPLITTER_CONFIGURATION_4_SEGMENT;
+ }
+
+ intel_de_rmw(i915, ICL_PIPE_DSS_CTL1(pipe),
+ SPLITTER_ENABLE | SPLITTER_CONFIGURATION_MASK |
+ OVERLAP_PIXELS_MASK, dss1);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_dss.h b/drivers/gpu/drm/i915/display/intel_dss.h
new file mode 100644
index 000000000000..95302d061205
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dss.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef __INTEL_DSS_H__
+#define __INTEL_DSS_H__
+
+#include "linux/types.h"
+
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_encoder;
+
+u8 intel_dss_mso_pipe_mask(struct drm_i915_private *i915);
+void intel_dss_mso_get_config(struct intel_encoder *encoder,
+ struct intel_crtc_state *pipe_config);
+void intel_dss_mso_configure(const struct intel_crtc_state *crtc_state);
+
+#endif /* __INTEL_DSS_H__ */
diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index edfd812e0f41..ff1c0ce6da86 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -228,6 +228,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
i915-display/intel_dsi.o \
i915-display/intel_dsi_dcs_backlight.o \
i915-display/intel_dsi_vbt.o \
+ i915-display/intel_dss.o \
i915-display/intel_encoder.o \
i915-display/intel_fb.o \
i915-display/intel_fbc.o \
--
2.45.2
