drm/amdgpu/vce1: Implement VCE1 IP block (v2)

Implement the necessary functionality to support the VCE1.
This implementation is based on:

- VCE2 code from amdgpu
- VCE1 code from radeon (the old driver)
- Some trial and error

A subsequent commit will ensure correct mapping for
the VCPU BO, which will make this actually work.

v2:
- Use memset_io more.
- Use memcpy_toio more.
- Remove __func__ from warnings.
- Don't reserve and map the VCPU BO anymore.
- Add empty line to multi-line comments

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Co-developed-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Timur Kristóf

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -78,7 +78,7 @@ amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o \
 	dce_v8_0.o gfx_v7_0.o cik_sdma.o uvd_v4_2.o vce_v2_0.o
 
 amdgpu-$(CONFIG_DRM_AMDGPU_SI)+= si.o gmc_v6_0.o gfx_v6_0.o si_ih.o si_dma.o dce_v6_0.o \
-	uvd_v3_1.o
+	uvd_v3_1.o vce_v1_0.o
 
 amdgpu-y += \
 	vi.o mxgpu_vi.o nbio_v6_1.o soc15.o emu_soc.o mxgpu_ai.o nbio_v7_0.o vega10_reg_init.o \

drivers/gpu/drm/amd/amdgpu/amdgpu_vce.h

@@ -51,6 +51,7 @@ struct amdgpu_vce {
 	struct drm_sched_entity	entity;
 	uint32_t                srbm_soft_reset;
 	unsigned		num_rings;
+	uint32_t		keyselect;
 };
 
 int amdgpu_vce_early_init(struct amdgpu_device *adev);