[PATCH v4 2/3] drm/msm/dpu: Integrate interconnect API in MDSS

[Georgi Djakov]

Hi Jayant,

On 12/21/18 08:20, Jayant Shekhar wrote:
> From: Sravanthi Kollukuduru <skolluku at codeaurora.org>
> 
> The interconnect framework is designed to provide a
> standard kernel interface to control the settings of
> the interconnects on a SoC.
> 
> The interconnect API uses a consumer/provider-based model,
> where the providers are the interconnect buses and the
> consumers could be various drivers.
> 
> MDSS is one of the interconnect consumers which uses the
> interconnect APIs to get the path between endpoints and
> set its bandwidth/latency/QoS requirements for the given

Currently we set only bandwidth.

> interconnected path.
> 
> Changes in v2:
> 	- Remove error log and unnecessary check (Jordan Crouse)
> 
> Changes in v3:
> 	- Code clean involving variable name change, removal
> 	  of extra paranthesis and variables (Matthias Kaehlcke)
> 
> Changes in v4:
> 	- Add comments, spacings, tabs, proper port name
> 	  and icc macro (Georgi Djakov)

The changes should not be part of the commit text, but should move below
the "---" line.

> 
> Signed-off-by: Sravanthi Kollukuduru <skolluku at codeaurora.org>
> Signed-off-by: Jayant Shekhar <jshekhar at codeaurora.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 49 +++++++++++++++++++++++++++++---
>  1 file changed, 45 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> index 38576f8..fcaa71f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> @@ -4,11 +4,15 @@
>   */
>  
>  #include "dpu_kms.h"
> +#include <linux/interconnect.h>
>  
>  #define to_dpu_mdss(x) container_of(x, struct dpu_mdss, base)
>  
>  #define HW_INTR_STATUS			0x0010
>  
> +/* Max BW defined in KBps */
> +#define MAX_BW				6800000
> +
>  struct dpu_mdss {
>  	struct msm_mdss base;
>  	void __iomem *mmio;
> @@ -16,8 +20,30 @@ struct dpu_mdss {
>  	u32 hwversion;
>  	struct dss_module_power mp;
>  	struct dpu_irq_controller irq_controller;
> +	struct icc_path *path[2];
> +	u32 num_paths;
>  };
>  
> +static int dpu_mdss_parse_data_bus_icc_path(struct drm_device *dev,
> +		struct dpu_mdss *dpu_mdss)

Nit: Please align to the open parenthesis.

Otherwise looks good to me.

Thanks,
Georgi