[PATCH v4 14/14] drm/msm/a6xx: Add A610 speedbin support

[Konrad Dybcio]

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 at linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio at linaro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 27b96a335039..f9f1a6c50f65 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -2136,6 +2136,30 @@ 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)
@@ -2232,6 +2256,9 @@ 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);
 

-- 
2.39.2