[PATCH 3/5] drm/msm/A6x: Add gmu_read64() register read op

[Jordan Crouse]

On Thu, Aug 23, 2018 at 02:48:29PM +0530, Sharat Masetty wrote:
> Add a simple function to read 64 registers in the GMU domain
> 
> Signed-off-by: Sharat Masetty <smasetty at codeaurora.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> index a08ee8f..f9e4dfe 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> @@ -106,6 +106,19 @@ static inline void gmu_rmw(struct a6xx_gmu *gmu, u32 reg, u32 mask, u32 or)
>  	gmu_write(gmu, reg, val | or);
>  }
>  
> +static inline u64 gmu_read64(struct a6xx_gmu *gmu, u32 lo, u32 hi)
> +{
> +	u64 val;
> +
> +	/*
> +	 * Implementation similar to gpu_read64()
> +	 */

I'm not sure this comment is really needed, and it certainly could just be one
line if it is.

> +	val = (u64) msm_readl(gmu->mmio + (lo << 2));
> +	val |= ((u64) msm_readl(gmu->mmio + (hi << 2)) << 32);
> +
> +	return val;
> +}
> +
>  #define gmu_poll_timeout(gmu, addr, val, cond, interval, timeout) \
>  	readl_poll_timeout((gmu)->mmio + ((addr) << 2), val, cond, \
>  		interval, timeout)
> -- 
> 1.9.1
> 

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