drm/display: Move DSC header and helpers into display-helper module

DSC is the Display Stream Compression standard for DisplayPort. Move
the DSC code into display/ and split the header into files for protocol
core and DRM helpers. Adapt all users of the code. No functional
changes.

To avoid the proliferation of Kconfig options, DSC is part of DRM's
support for DisplayPort. If necessary, a new option could make DSC an
independent feature.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220421073108.19226-6-tzimmermann@suse.de

19 files changed, 46 insertions, 24 deletions

diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst
index 09463ee99730..7af55fb4072c 100644
--- a/Documentation/gpu/drm-kms-helpers.rst
+++ b/Documentation/gpu/drm-kms-helpers.rst
@@ -326,13 +326,13 @@ MIPI DSI Helper Functions Reference
 Display Stream Compression Helper Functions Reference
 =====================================================
 
-.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
+.. kernel-doc:: drivers/gpu/drm/display/drm_dsc_helper.c
    :doc: dsc helpers
 
-.. kernel-doc:: include/drm/drm_dsc.h
+.. kernel-doc:: include/drm/display/drm_dsc.h
    :internal:
 
-.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
+.. kernel-doc:: drivers/gpu/drm/display/drm_dsc_helper.c
    :export:
 
 Output Probing Helper Functions Reference
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 07f7a70a78ea..b8353af70152 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -58,7 +58,7 @@ obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o
 #
 
 drm_kms_helper-y := drm_bridge_connector.o drm_crtc_helper.o \
-		drm_dsc.o drm_encoder_slave.o drm_flip_work.o drm_hdcp.o \
+		drm_encoder_slave.o drm_flip_work.o drm_hdcp.o \
 		drm_probe_helper.o \
 		drm_plane_helper.o drm_atomic_helper.o \
 		drm_kms_helper_common.o \
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c
index ef5c4c0f4d6c..6f24ceab97ad 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c
@@ -23,6 +23,8 @@
  *
  */
 
+#include <drm/display/drm_dsc_helper.h>
+
 #include "reg_helper.h"
 #include "dcn20_dsc.h"
 #include "dsc/dscc_types.h"
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.h
index 1118e33aaa2c..c21ecedc4692 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.h
@@ -26,7 +26,7 @@
 
 #include "dsc.h"
 #include "dsc/dscc_types.h"
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc.h>
 
 #define TO_DCN20_DSC(dsc)\
 	container_of(dsc, struct dcn20_dsc, base)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.h b/drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.h
index cad244c023cd..d7cd8cc24758 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.h
@@ -27,7 +27,7 @@
 #define __RC_CALC_FPU_H__
 
 #include "os_types.h"
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc.h>
 
 #define QP_SET_SIZE 15
 
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
index dc82e04e36dc..fa39a06eed1d 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
@@ -22,10 +22,10 @@
  * Author: AMD
  */
 
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dsc_helper.h>
 #include "dc_hw_types.h"
 #include "dsc.h"
-#include <drm/display/drm_dp_helper.h>
 #include "dc.h"
 #include "rc_calc.h"
 #include "fixed31_32.h"
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dscc_types.h b/drivers/gpu/drm/amd/display/dc/dsc/dscc_types.h
index 9f70e87b3ecb..ad80bde9bc0f 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dscc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dscc_types.h
@@ -26,7 +26,7 @@
 #ifndef __DSCC_TYPES_H__
 #define __DSCC_TYPES_H__
 
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc.h>
 
 #ifndef NUM_BUF_RANGES
 #define NUM_BUF_RANGES 15
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c b/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c
index 7e306aa3e2b9..f0aea988fef0 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c
+++ b/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c
@@ -22,7 +22,7 @@
  * Authors: AMD
  *
  */
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
 #include "dscc_types.h"
 #include "rc_calc.h"
 
diff --git a/drivers/gpu/drm/display/Makefile b/drivers/gpu/drm/display/Makefile
index 99ba6750a315..4f4e35034960 100644
--- a/drivers/gpu/drm/display/Makefile
+++ b/drivers/gpu/drm/display/Makefile
@@ -5,7 +5,8 @@ obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
 drm_display_helper-y := drm_display_helper_mod.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += drm_dp_dual_mode_helper.o \
 						      drm_dp_helper.o \
-						      drm_dp_mst_topology.o
+						      drm_dp_mst_topology.o \
+						      drm_dsc_helper.o
 drm_display_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
 drm_display_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
 
diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index 2428bdfc4c8f..c869c6e51e2b 100644
--- a/drivers/gpu/drm/drm_dsc.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -13,8 +13,8 @@
 #include <linux/byteorder/generic.h>
 
 #include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dsc_helper.h>
 #include <drm/drm_print.h>
-#include <drm/drm_dsc.h>
 
 /**
  * DOC: dsc helpers
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 18cef04df2f2..c40bde96cfdf 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -25,16 +25,16 @@
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <drm/drm_mipi_dsi.h>
-
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc.h>
+#include <drm/drm_mipi_dsi.h>
 #include <drm/drm_print.h>
+
 #include <video/mipi_display.h>
 
 /**
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 084cc51d1c41..d1abd00d4f4d 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -25,6 +25,7 @@
  *   Jani Nikula <jani.nikula@intel.com>
  */
 
+#include <drm/display/drm_dsc_helper.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_mipi_dsi.h>
 
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index cf56c0109f49..81949c36ab96 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -26,6 +26,7 @@
  */
 
 #include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dsc_helper.h>
 
 #include "display/intel_display.h"
 #include "display/intel_display_types.h"
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index efc42af60440..408152f9f46a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -33,9 +33,9 @@
 
 #include <drm/display/drm_dp_dual_mode_helper.h>
 #include <drm/display/drm_dp_mst_helper.h>
+#include <drm/display/drm_dsc.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_crtc.h>
-#include <drm/drm_dsc.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 9801e6f0ad3b..8c0fe4d53806 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -36,6 +36,7 @@
 #include <asm/byteorder.h>
 
 #include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dsc_helper.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
diff --git a/drivers/gpu/drm/i915/display/intel_qp_tables.c b/drivers/gpu/drm/i915/display/intel_qp_tables.c
index c626a24fe98f..6f8e4ec5c0fb 100644
--- a/drivers/gpu/drm/i915/display/intel_qp_tables.c
+++ b/drivers/gpu/drm/i915/display/intel_qp_tables.c
@@ -3,7 +3,7 @@
  * Copyright © 2021 Intel Corporation
  */
 
-#include <drm/drm_dsc.h>
+#include <drm/display/drm_dsc.h>
 
 #include "i915_utils.h"
 #include "intel_qp_tables.h"
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index e59c29ab1300..43e1bbc1e303 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -7,6 +7,8 @@
  */
 #include <linux/limits.h>
 
+#include <drm/display/drm_dsc_helper.h>
+
 #include "i915_drv.h"
 #include "intel_crtc.h"
 #include "intel_de.h"
diff --git a/include/drm/drm_dsc.h b/include/drm/display/drm_dsc.h
index 84e3d11cc1bb..bc90273d06a6 100644
--- a/include/drm/drm_dsc.h
+++ b/include/drm/display/drm_dsc.h
@@ -8,7 +8,7 @@
 #ifndef DRM_DSC_H_
 #define DRM_DSC_H_
 
-#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_dp.h>
 
 /* VESA Display Stream Compression DSC 1.2 constants */
 #define DSC_NUM_BUF_RANGES			15
@@ -602,10 +602,4 @@ struct drm_dsc_pps_infoframe {
 	struct drm_dsc_picture_parameter_set pps_payload;
 } __packed;
 
-void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
-int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
-void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
-				const struct drm_dsc_config *dsc_cfg);
-int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
-
 #endif /* _DRM_DSC_H_ */
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
new file mode 100644
index 000000000000..8b41edbbabab
--- /dev/null
+++ b/include/drm/display/drm_dsc_helper.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: MIT
+ * Copyright (C) 2018 Intel Corp.
+ *
+ * Authors:
+ * Manasi Navare <manasi.d.navare@intel.com>
+ */
+
+#ifndef DRM_DSC_HELPER_H_
+#define DRM_DSC_HELPER_H_
+
+#include <drm/display/drm_dsc.h>
+
+void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
+int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
+void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
+			      const struct drm_dsc_config *dsc_cfg);
+int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
+
+#endif /* _DRM_DSC_HELPER_H_ */
+