drm/msm/a6xx: Introduce a6xx_llc_read

Add a helper that does exactly what it says on the can, it'll be
required for A7xx.

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # sm8450
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/551828/
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 1ed202c..0fef92f 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1740,6 +1740,11 @@ static void a6xx_llc_rmw(struct a6xx_gpu *a6xx_gpu, u32 reg, u32 mask, u32 or)
        return msm_rmw(a6xx_gpu->llc_mmio + (reg << 2), mask, or);
 }
 
+static u32 a6xx_llc_read(struct a6xx_gpu *a6xx_gpu, u32 reg)
+{
+       return msm_readl(a6xx_gpu->llc_mmio + (reg << 2));
+}
+
 static void a6xx_llc_write(struct a6xx_gpu *a6xx_gpu, u32 reg, u32 value)
 {
        msm_writel(value, a6xx_gpu->llc_mmio + (reg << 2));