drm/i915/tgl: Add Clear Color support for TGL Render Decompression
Render Decompression is supported with Y-Tiled main surface. The CCS is
linear and has 4 bits of data for each main surface cache line pair, a
ratio of 1:256. Additional Clear Color information is passed from the
user-space through an offset in the GEM BO. Add a new modifier to identify
and parse new Clear Color information and extend Gen12 render decompression
functionality to the newly added modifier.
v2: Fix has_alpha flag for modifiers, omit CC modifier during initial
plane config(Matt). Fix Lookup error.
v3: Fix the panic while running kms_cube
v4: Add alignment check and reuse the comments for ge12_ccs_formats(Matt)
v5: Fix typos and wrap comments(Matt)
v6:
- Use format block descriptors to get the subsampling calculations for
the CCS surface right.
- Use helpers to convert between main and CCS surfaces.
- Prevent coordinate checks for the CC surface.
- Simplify reading CC value from surface map, add description of CC val
layout.
- Remove redundant ccval variable from skl_program_plane().
v7:
- Move the CC value readout after syncing against any GPU write on the
FB obj (Nanley, Chris)
- Make sure the CC value readout works on platforms w/o struct pages
(dGFX) and other non-coherent platforms wrt. CPU reads (none atm).
(Chris)
v8:
- Rebase on the function param order change of
i915_gem_object_read_from_page().
- Clarify code comment on the clear color value format and the required
FB obj pinning/syncing by the caller.
- Remove redundant variables in
intel_atomic_prepare_plane_clear_colors().
v9:
- Fix s/sizeof(&ccval)/sizeof(ccval)/ typo.
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Ville Syrjala <ville.syrjala@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Cc: Nanley G Chery <nanley.g.chery@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210115213952.1040398-1-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 249a815..8b9bbc6 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7070,6 +7070,8 @@ enum {
#define _PLANE_KEYMAX_1_A 0x701a0
#define _PLANE_KEYMAX_2_A 0x702a0
#define PLANE_KEYMAX_ALPHA(a) ((a) << 24)
+#define _PLANE_CC_VAL_1_A 0x701b4
+#define _PLANE_CC_VAL_2_A 0x702b4
#define _PLANE_AUX_DIST_1_A 0x701c0
#define _PLANE_AUX_DIST_2_A 0x702c0
#define _PLANE_AUX_OFFSET_1_A 0x701c4
@@ -7111,6 +7113,13 @@ enum {
#define _PLANE_NV12_BUF_CFG_1_A 0x70278
#define _PLANE_NV12_BUF_CFG_2_A 0x70378
+#define _PLANE_CC_VAL_1_B 0x711b4
+#define _PLANE_CC_VAL_2_B 0x712b4
+#define _PLANE_CC_VAL_1(pipe) _PIPE(pipe, _PLANE_CC_VAL_1_A, _PLANE_CC_VAL_1_B)
+#define _PLANE_CC_VAL_2(pipe) _PIPE(pipe, _PLANE_CC_VAL_2_A, _PLANE_CC_VAL_2_B)
+#define PLANE_CC_VAL(pipe, plane) \
+ _MMIO_PLANE(plane, _PLANE_CC_VAL_1(pipe), _PLANE_CC_VAL_2(pipe))
+
/* Input CSC Register Definitions */
#define _PLANE_INPUT_CSC_RY_GY_1_A 0x701E0
#define _PLANE_INPUT_CSC_RY_GY_2_A 0x702E0
