drm/msm/a6xx: Add A619_holi speedbin support

A619_holi is implemented on at least two SoCs: SM4350 (holi) and SM6375
(blair). This is what seems to be a first occurrence of this happening,
but it's easy to overcome by guarding the SoC-specific fuse values with
of_machine_is_compatible(). Do just that to enable frequency limiting
on these SoCs.

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/542772/
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 d7139ea..ff9a8d3 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -2216,6 +2216,34 @@ static u32 a618_get_speed_bin(u32 fuse)
        return UINT_MAX;
 }
 
+static u32 a619_holi_get_speed_bin(u32 fuse)
+{
+       /*
+        * There are (at least) two SoCs implementing A619_holi: SM4350 (holi)
+        * and SM6375 (blair). Limit the fuse matching to the corresponding
+        * SoC to prevent bogus frequency setting (as improbable as it may be,
+        * given unexpected fuse values are.. unexpected! But still possible.)
+        */
+
+       if (fuse == 0)
+               return 0;
+
+       if (of_machine_is_compatible("qcom,sm4350")) {
+               if (fuse == 138)
+                       return 1;
+               else if (fuse == 92)
+                       return 2;
+       } else if (of_machine_is_compatible("qcom,sm6375")) {
+               if (fuse == 190)
+                       return 1;
+               else if (fuse == 177)
+                       return 2;
+       } else
+               pr_warn("Unknown SoC implementing A619_holi!\n");
+
+       return UINT_MAX;
+}
+
 static u32 a619_get_speed_bin(u32 fuse)
 {
        if (fuse == 0)
@@ -2276,6 +2304,9 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_gpu *adreno_gpu, u3
        if (adreno_is_a618(adreno_gpu))
                val = a618_get_speed_bin(fuse);
 
+       else if (adreno_is_a619_holi(adreno_gpu))
+               val = a619_holi_get_speed_bin(fuse);
+
        else if (adreno_is_a619(adreno_gpu))
                val = a619_get_speed_bin(fuse);