drm/msm/a6xx: Add A610 speedbin support

A610 is implemented on at least three SoCs: SM6115 (bengal), SM6125
(trinket) and SM6225 (khaje). Trinket does not support speed binning
(only a single SKU exists) and we don't yet support khaje upstream.
Hence, add a fuse mapping table for bengal to allow for per-chip
frequency limiting.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/542780/
Signed-off-by: Rob Clark <robdclark@chromium.org>

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index ff9a8d342c7791e06df54367ed073628de95871c..b3ada1e7b598baf5dd63a89e39139d52462cc340 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -2204,6 +2204,30 @@ static bool a6xx_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
        return progress;
 }
 
+static u32 a610_get_speed_bin(u32 fuse)
+{
+       /*
+        * There are (at least) three SoCs implementing A610: SM6125 (trinket),
+        * SM6115 (bengal) and SM6225 (khaje). Trinket does not have speedbinning,
+        * as only a single SKU exists and we don't support khaje upstream yet.
+        * Hence, this matching table is only valid for bengal and can be easily
+        * expanded if need be.
+        */
+
+       if (fuse == 0)
+               return 0;
+       else if (fuse == 206)
+               return 1;
+       else if (fuse == 200)
+               return 2;
+       else if (fuse == 157)
+               return 3;
+       else if (fuse == 127)
+               return 4;
+
+       return UINT_MAX;
+}
+
 static u32 a618_get_speed_bin(u32 fuse)
 {
        if (fuse == 0)
@@ -2301,6 +2325,9 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_gpu *adreno_gpu, u3
 {
        u32 val = UINT_MAX;
 
+       if (adreno_is_a610(adreno_gpu))
+               val = a610_get_speed_bin(fuse);
+
        if (adreno_is_a618(adreno_gpu))
                val = a618_get_speed_bin(fuse);