[PATCH v17 0/5] Add RZ/{G2L,G2LC} and RZ/V2L Display Unit support

[Biju Das <biju.das.jz@bp.renesas.com>]

This path series aims to add support for RZ/G2L DU DRM driver.

RZ/G2L LCD controller composed of Frame compression Processor(FCPVD), Video
signal processor (VSPD) and Display unit(DU). The output of LCDC is
connected to Display parallel interface and MIPI link video interface.
 
The output from DSI is connected to ADV7535.

Ref:
 https://lore.kernel.org/linux-renesas-soc/OS0PR01MB5922717E4CCFE07F3C25FBC986989@OS0PR01MB5922.jpnprd01.prod.outlook.com/#t

This patch series is tested with [2]
[2] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=742810

Test logs kmscube: [3]
v16->v17:
 * Dropped import_sg_table implementation() as we are using the helpers.
 * Dropped unused rzg2l_du_vsp_atomic_begin().
v15->v16:
 * Added Rb and Ack tag from Geert for patch#4.
 * Dropped rzg2l_du_crtc_get(rcrtc) from rzg2l_du_crtc_atomic_flush() as
   it is not needed by moving to drm_atomic_helper_commit_tail_rpm().
 * Dropped destroy callback from struct drm_crtc_funcs
 * Replaced drm_crtc_init_with_planes()->drmm_crtc_init_with_planes()
 * Introduced rzg2l_du_vsp_get_drm_plane() to get primary plane
   compared to &rcrtc->vsp->planes[rcrtc->vsp_pipe].plane.
 * Replaced rzg2l_du_atomic_commit_tail()->drm_atomic_helper_commit_
   tail_rpm()
 * Dropped the comment "older DT bindings" in rzg2l_du_vsps_init()
 * Dropped rzg2l_du_vsp_{map_fb,plane_prepare_fb,unmap_fb,
   plane_cleanup_fb} and instead using helpers.
 * Dropped prepare_fb and cleanup_fb callbacks from
   struct drm_plane_helper_funcs
 * Dropped destroy from struct drm_plane_funcs
 * Replaced drm_universal_plane_init()->drmm_universal_plane_alloc()
 * Dropped planes and num_planes variables from struct rzg2l_du_vsp
 * Dropped sg_tables variable from struct rzg2l_du_vsp_plane_state.
v14->v15:
 * Added patch#4, The rcar-du has never been maintained in drm-misc. So
   exclude only this driver from drm-misc. Also, add the tree entry for
   sh_mobile.
 * Added drm-misc tree entry.
 * Sorted the entry(Placed before SHMOBILE)
v13->v14:
 * Replaced the label 'error'->'done' in rzg2l_du_vsps_init() as it
   applies to non-error case as well.
 * Update the error check condition for rcar_du_vsp_init() to avoid
   breakage in future, if it returns positive value.
 * Now SHMOBILE has maintainer entries. So dropped updating
   DRM DRIVERS FOR RENESAS RCAR AND SHMOBILE.
 * Updated comment header and description for maintainer entry patch.
v12->v13:
 * Dropped DU_MCR0_DPI_OE and unused macros.
 * Dropped unneeded backward compatibility with old DTBs as it is new driver.
 * Replaced "cells > 1"-> "cells != 1" in rzg2l_du_vsps_init().
 * Fixed memory leak in rzg2l_du_vsps_init().
 * Dropped drm_plane_create_{alpha,zpos,blend_mode}_property().
v11->v12:
 * Dropped quotes in ref handle for renesas,vsps property.
 * Retained tags as it is trivial change.
 * Replaced rzg2l_du_write()->writel().
v10->v11:
 * Replaced CONFIG_DRM_RCAR_VSP->CONFIG_VIDEO_RENESAS_VSP1 for building
   rzg2l_du_vsp driver.
 * Dropped "rzg2l_du_regs.h" instead the relevant definitions defined in
   .c file.
 * Dropped setting ditr5 based on latest HW manual 1.3.0/1.4.0
 * Updated the comment for auto clear.
 * Replaced writel()->rzg2l_du_write() in rzg2l_du_start_stop().
 * Dropped CRC related functions as it does not have DISCOM.
 * Replaced the variable possible_crtcs->possible_outputs in
   struct rzg2l_du_output_routing.
 * Updated DMA_BIT_MASK from 40->32.
 * Dropped unneeded struct drm_bridge from rzg2l_du_drv.h.
 * Dropped colour keying support as it doesn't have planes.
 * Added only RGB formats in rzg2l_du_format_infos.
 * Dropped chroma planes from rzg2l_du_fb_create().
 * Updated the comment for max_pitch in rzg2l_du_fb_create().
 * Dropped possible_crtcs check in rzg2l_du_encoders_init().
 * Dropped additional empty line from struct rzg2l_du_device.
v9->v10:
 * patch#1 is mainlined, so dropped from this series.
 * Added Rb tag from Laurent for the binding patch.
 * Updated the commit description.
 * Updated description of the port by dropping the text "specified in
   Documentation/devicetree/bindings/graph.txt."
 * Dropped empty endpoint from example.
 * Dropped ARM64 dependency from Kconfig.
 * Sorted the configs alphabetically in Kconfig.
 * Dropped DRM_RCAR_VSP config option and make DRM_RZG2L_DU depend on
   VIDEO_RENESAS_VSP1.
 * On rzg2l_du_crtc_set_display_timing() replaced the setting of parent
   clk rate with dclk rate.
 * Added rzg2l_du_write() wrapper function.
 * Updated the comment atomic_begin->atomic_flush.
 * Dropped .atomic_check and .atomic_begin callback
 * Renamed __rzg2l_du_crtc_plane_atomic_check->__rzg2l_du_vsp_plane_atomic
   _check and moved it to rzg2l_du_vsp.c
 * Added struct clk in rzg2l_du_crtc.h
 * Dropped the variables mmio_offset,index,vblank_lock,vblank_wait,
   vblank_count from struct rzg2l_du_crtc.
 * Replaced the macro to_rzg2l_crtc with static inline functions.
 * Dropped the unneeded header files clk.h, io.h, mm.h, pm.h, slab.h,
   wait.h and drm_managed.h from rzg2l_du_drv.c.
 * Replaced DRM_INFO->drm_info
 * Dropped the callbacks prime_handle_to_fd, prime_fd_to_handle and
   gem_prime_mmap.
 * Replaced the callback remove->remove_new.
 * Dropped header file wait.h and added forward declarations struct clk and
   rzg2l_du_device from rzg2l_du_drv.h.
 * Dropped the dsi and dpad0_source variables from struct rzg2l_du_device.
 * Replaced the macro to_rzg2l_encoder with static inline functions.
 * Dropped header files dma-buf.h and wait.h from rzg2l_du_kms.c.
 * Dropped struct sg_table and added the scatterlist.h header file in
   rzg2l_du_vsp.h
 * Added container_of.h header file, forward declarations struct device and
   struct rzg2l_du_device in rzg2l_du_vsp.h.
v8->v9:
 * Added Rb tag from Laurent and Acked-by tag from Kieran for patch#1.
 * Added Rb tag from Laurent and Geert for patch#3.
 * Dropped reset_control_assert() from error patch for rzg2l_du_crtc_get() as
   suggested by Philipp Zabel.
 * Added Rb tag from Laurent oatch#5.
 * Updated MAINTAINERS entries for common parts(Makefile and Kconfig).
v7->v8:
 * Moved rcar-du and shmobile DRM drivers to renesas specific vendor directory.
 * Fixed the typo vsp2->du in RZ/V2L DU bindings patch.
 * Added Rb tag from Rob for RZ/V2L DU bindings patch.
 * Dropped RCar du lib and created RZ/G2L DU DRM driver by creating rz_du folder.
 * Updated MAINTAINERS entries.
v6->v7:
 * Split DU lib and  RZ/G2L du driver as separate patch series as
   DU support added to more platforms based on RZ/G2L alike SoCs.
 * Rebased to latest drm-tip.
 * Added patch #2 for binding support for RZ/V2L DU
 * Added patch #4 for driver support for RZ/V2L DU
 * Added patch #5 for SoC DTSI support for RZ/G2L DU
 * Added patch #6 for SoC DTSI support for RZ/V2L DU
 * Added patch #7 for Enabling DU on SMARC EVK based on RZ/{G2L,V2L} SoCs.
 * Added patch #8 for Enabling DU on SMARC EVK based on RZ/G2LC SoC.
v5->v6:
 * Merged DU lib and RZ/G2L du driver in same patch series
 * Rebased to latest drm-misc.
 * Merged patch#1 to RZ/G2L Driver patch.
 * Updated KConfig dependency from ARCH_RENESAS->ARCH_RZG2L.
 * Optimized rzg2l_du_output_name() by removing unsupported outputs.

v4->v5:
 * Added Rb tag from Rob for binding patch.
 * Started using RCar DU libs(kms, vsp and encoder)
 * Started using rcar_du_device, rcar_du_write, rcar_du_crtc,
   rcar_du_format_info and rcar_du_encoder.
v3->v4:
 * Changed compatible name from renesas,du-r9a07g044->renesas,r9a07g044-du
 * started using same compatible for RZ/G2{L,LC}
 * Removed rzg2l_du_group.h and struct rzg2l_du_group
 * Renamed __rzg2l_du_group_start_stop->rzg2l_du_start_stop
 * Removed rzg2l_du_group_restart
 * Updated rzg2l_du_crtc_set_display_timing
 * Removed mode_valid callback.
 * Updated rzg2l_du_crtc_create() parameters
 * Updated compatible
 * Removed RZG2L_DU_MAX_GROUPS
V2->v3:
 * Added new bindings for RZ/G2L DU
 * Removed indirection and created new DRM driver based on R-Car DU
v1->v2:
 * Based on [1], all references to 'rzg2l_lcdc' replaced with 'rzg2l_du'
 * Updated commit description for bindings
 * Removed LCDC references from bindings
 * Changed clock name from du.0->aclk from bindings
 * Changed reset name from du.0->du from bindings
 * Replaced crtc_helper_funcs->rcar_crtc_helper_funcs
 * Updated macro DRM_RZG2L_LCDC->DRM_RZG2L_DU
 * Replaced rzg2l-lcdc-drm->rzg2l-du-drm
 * Added forward declaration for struct reset_control

[1] https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220312084205.31462-2-biju.das.jz@bp.renesas.com/

[3]
root@smarc-rzv2l:/cip-test-scripts# kmscube
Using display 0xaaaad2a6a160 with EGL version 1.4
===================================
EGL information:
  version: "1.4"
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_client_extensions EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_KHR_debug EGL_EXT_platform_device EGL_EXT_platform_wayland EGL_KHR_platform_wayland EGL_MESA_platform_gbm EGL_KHR_platform_gbm EGL_MESA_platform_surfaceless"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_partial_update EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_WL_bind_wayland_display "
===================================
OpenGL ES 2.x information:
  version: "OpenGL ES 3.1 Mesa 21.3.7"
  shading language version: "OpenGL ES GLSL ES 3.10"
  vendor: "Panfrost"
  renderer: "Mali-G31 (Panfrost)"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_filter_anisotropic GL_EXT_texture_compression_rgtc GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_EXT_draw_instanced GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_NV_conditional_render GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_ANGLE_pack_reverse_row_order GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_NV_pixel_buffer_object GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_color_buffer_float GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects GL_EXT_shader_framebuffer_fetch GL_EXT_shader_implicit_conversions GL_EXT_shader_integer_mix GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_buffers_indexed GL_EXT_draw_elements_base_vertex GL_EXT_gpu_shader5 GL_EXT_primitive_bounding_box GL_EXT_shader_io_blocks GL_EXT_texture_border_clamp GL_EXT_texture_buffer GL_EXT_texture_view GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent GL_KHR_context_flush_control GL_NV_image_formats GL_OES_draw_buffers_indexed GL_OES_draw_elements_base_vertex GL_OES_gpu_shader5 GL_OES_primitive_bounding_box GL_OES_sample_shading GL_OES_sample_variables GL_OES_shader_io_blocks GL_OES_shader_multisample_interpolation GL_OES_texture_border_clamp GL_OES_texture_buffer GL_OES_texture_stencil8 GL_OES_texture_storage_multisample_2d_array GL_OES_texture_view GL_EXT_blend_func_extended GL_EXT_float_blend GL_EXT_texture_sRGB_R8 GL_EXT_texture_sRGB_RG8 GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_OES_EGL_image_external_essl3 GL_OES_shader_image_atomic GL_EXT_multisampled_render_to_texture GL_EXT_multisampled_render_to_texture2 GL_MESA_shader_integer_functions GL_EXT_color_buffer_half_float GL_EXT_texture_mirror_clamp_to_edge GL_KHR_parallel_shader_compile GL_EXT_EGL_image_storage GL_EXT_shader_framebuffer_fetch_non_coherent GL_INTEL_blackhole_render GL_MESA_framebuffer_flip_y GL_EXT_depth_clamp GL_MESA_bgra "
===================================
 
 cat /sys/class/devfreq/11840000.gpu/trans_stat
 [INFO]      From  :   To
 [INFO]            :  50000000  62500000 100000000 125000000 200000000 250000000 400000000 500000000   time(ms)
 [INFO]    50000000:         0         0         0         0         0         0         0         2       380
 [INFO]    62500000:         0         0         0         0         0         0         0         0         0
 [INFO]   100000000:         0         0         0         0         0         0         0         0         0
 [INFO]   125000000:         0         0         0         0         0         0         0         0         0
 [INFO] * 200000000:         1         0         0         0         0         0         0        79      4576
 [INFO]   250000000:         0         0         0         0        69         0         0         0      5292
 [INFO]   400000000:         0         0         0         0         5         0         0         2       440
 [INFO]   500000000:         1         0         0         0         7        69         7         0      5340
 [INFO] Total transition : 242

Biju Das (5):
  dt-bindings: display: Document Renesas RZ/G2L DU bindings
  dt-bindings: display: renesas,rzg2l-du: Document RZ/V2L DU bindings
  drm: renesas: Add RZ/G2L DU Support
  MAINTAINERS: Update entries for Renesas DRM drivers
  MAINTAINERS: Create entry for Renesas RZ DRM drivers

 .../bindings/display/renesas,rzg2l-du.yaml    | 126 ++++++
 MAINTAINERS                                   |  12 +-
 drivers/gpu/drm/renesas/Kconfig               |   1 +
 drivers/gpu/drm/renesas/Makefile              |   1 +
 drivers/gpu/drm/renesas/rz-du/Kconfig         |  12 +
 drivers/gpu/drm/renesas/rz-du/Makefile        |   8 +
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c | 422 ++++++++++++++++++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.h |  89 ++++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c  | 175 ++++++++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.h  |  78 ++++
 .../gpu/drm/renesas/rz-du/rzg2l_du_encoder.c  |  72 +++
 .../gpu/drm/renesas/rz-du/rzg2l_du_encoder.h  |  32 ++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c  | 371 +++++++++++++++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.h  |  43 ++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.c  | 349 +++++++++++++++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.h  |  82 ++++
 16 files changed, 1872 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
 create mode 100644 drivers/gpu/drm/renesas/rz-du/Kconfig
 create mode 100644 drivers/gpu/drm/renesas/rz-du/Makefile
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.h
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.h
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.h
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.h
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.c
 create mode 100644 drivers/gpu/drm/renesas/rz-du/rzg2l_du_vsp.h


base-commit: 239cce651ea617002ff26f068f2568b2baf6421a
-- 
2.25.1