drm/i915/adl_p: Add ddb allocation support

On adlp the two mbuses have two display pipes and
two DBUFS, Pipe A and D on Mbus1 and Pipe B and C on
Mbus2. The Mbus can be joined and all the DBUFS can be
used on Pipe A or B.

Bspec: 49255
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210519000625.3184321-8-lucas.demarchi@intel.com

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b370143..192b3db 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7293,7 +7293,7 @@ enum {
 
 #define _PLANE_BUF_CFG_1_B                     0x7127c
 #define _PLANE_BUF_CFG_2_B                     0x7137c
-#define  DDB_ENTRY_MASK                                0x7FF /* skl+: 10 bits, icl+ 11 bits */
+#define  DDB_ENTRY_MASK                                0xFFF /* skl+: 10 bits, icl+ 11 bits, adlp+ 12 bits */
 #define  DDB_ENTRY_END_SHIFT                   16
 #define _PLANE_BUF_CFG_1(pipe) \
        _PIPE(pipe, _PLANE_BUF_CFG_1_A, _PLANE_BUF_CFG_1_B)
@@ -8128,9 +8128,23 @@ enum {
 #define  DISP_DATA_PARTITION_5_6       (1 << 6)
 #define  DISP_IPC_ENABLE               (1 << 3)
 
-#define _DBUF_CTL_S1                           0x45008
-#define _DBUF_CTL_S2                           0x44FE8
-#define DBUF_CTL_S(slice)                      _MMIO(_PICK_EVEN(slice, _DBUF_CTL_S1, _DBUF_CTL_S2))
+/*
+ * The below are numbered starting from "S1" on gen11/gen12, but starting
+ * with gen13 display, the bspec switches to a 0-based numbering scheme
+ * (although the addresses stay the same so new S0 = old S1, new S1 = old S2).
+ * We'll just use the 0-based numbering here for all platforms since it's the
+ * way things will be named by the hardware team going forward, plus it's more
+ * consistent with how most of the rest of our registers are named.
+ */
+#define _DBUF_CTL_S0                           0x45008
+#define _DBUF_CTL_S1                           0x44FE8
+#define _DBUF_CTL_S2                           0x44300
+#define _DBUF_CTL_S3                           0x44304
+#define DBUF_CTL_S(slice)                      _MMIO(_PICK(slice, \
+                                                           _DBUF_CTL_S0, \
+                                                           _DBUF_CTL_S1, \
+                                                           _DBUF_CTL_S2, \
+                                                           _DBUF_CTL_S3))
 #define  DBUF_POWER_REQUEST                    REG_BIT(31)
 #define  DBUF_POWER_STATE                      REG_BIT(30)
 #define  DBUF_TRACKER_STATE_SERVICE_MASK       REG_GENMASK(23, 19)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 95fda20..411ec46 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4558,6 +4558,118 @@ static const struct dbuf_slice_conf_entry tgl_allowed_dbufs[] =
        {}
 };
 
+static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = {
+       {
+               .active_pipes = BIT(PIPE_A),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_B),
+               .dbuf_mask = {
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_C),
+               .dbuf_mask = {
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
+               .dbuf_mask = {
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {
+               .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+               .dbuf_mask = {
+                       [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+                       [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+                       [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+               },
+       },
+       {}
+
+};
+
 static u8 compute_dbuf_slices(enum pipe pipe, u8 active_pipes,
                              const struct dbuf_slice_conf_entry *dbuf_slices)
 {
@@ -4597,12 +4709,19 @@ static u8 tgl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes)
        return compute_dbuf_slices(pipe, active_pipes, tgl_allowed_dbufs);
 }
 
+static u32 adlp_compute_dbuf_slices(enum pipe pipe, u32 active_pipes)
+{
+       return compute_dbuf_slices(pipe, active_pipes, adlp_allowed_dbufs);
+}
+
 static u8 skl_compute_dbuf_slices(struct intel_crtc *crtc, u8 active_pipes)
 {
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum pipe pipe = crtc->pipe;
 
-       if (DISPLAY_VER(dev_priv) == 12)
+       if (IS_ALDERLAKE_P(dev_priv))
+               return adlp_compute_dbuf_slices(pipe, active_pipes);
+       else if (DISPLAY_VER(dev_priv) == 12)
                return tgl_compute_dbuf_slices(pipe, active_pipes);
        else if (DISPLAY_VER(dev_priv) == 11)
                return icl_compute_dbuf_slices(pipe, active_pipes);