Re: [Intel-gfx] [PATCH v2 08/11] drm/i915/gmbus: switch to intel_de_* register accessors in display code

[Andrzej Hajda <andrzej.hajda@intel.com>]

On 07.12.2022 18:17, Jani Nikula wrote:
> Avoid direct uncore use in display code.
> 
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>

Regards
Andrzej

> ---
>   drivers/gpu/drm/i915/display/intel_gmbus.c | 46 ++++++++--------------
>   1 file changed, 17 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
> index a5840a28a69d..0bc4f6b48e80 100644
> --- a/drivers/gpu/drm/i915/display/intel_gmbus.c
> +++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
> @@ -255,14 +255,12 @@ static void bxt_gmbus_clock_gating(struct drm_i915_private *i915,
>   static u32 get_reserved(struct intel_gmbus *bus)
>   {
>   	struct drm_i915_private *i915 = bus->i915;
> -	struct intel_uncore *uncore = &i915->uncore;
>   	u32 reserved = 0;
>   
>   	/* On most chips, these bits must be preserved in software. */
>   	if (!IS_I830(i915) && !IS_I845G(i915))
> -		reserved = intel_uncore_read_notrace(uncore, bus->gpio_reg) &
> -			   (GPIO_DATA_PULLUP_DISABLE |
> -			    GPIO_CLOCK_PULLUP_DISABLE);
> +		reserved = intel_de_read_notrace(i915, bus->gpio_reg) &
> +			(GPIO_DATA_PULLUP_DISABLE | GPIO_CLOCK_PULLUP_DISABLE);
>   
>   	return reserved;
>   }
> @@ -270,37 +268,31 @@ static u32 get_reserved(struct intel_gmbus *bus)
>   static int get_clock(void *data)
>   {
>   	struct intel_gmbus *bus = data;
> -	struct intel_uncore *uncore = &bus->i915->uncore;
> +	struct drm_i915_private *i915 = bus->i915;
>   	u32 reserved = get_reserved(bus);
>   
> -	intel_uncore_write_notrace(uncore,
> -				   bus->gpio_reg,
> -				   reserved | GPIO_CLOCK_DIR_MASK);
> -	intel_uncore_write_notrace(uncore, bus->gpio_reg, reserved);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved | GPIO_CLOCK_DIR_MASK);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved);
>   
> -	return (intel_uncore_read_notrace(uncore, bus->gpio_reg) &
> -		GPIO_CLOCK_VAL_IN) != 0;
> +	return (intel_de_read_notrace(i915, bus->gpio_reg) & GPIO_CLOCK_VAL_IN) != 0;
>   }
>   
>   static int get_data(void *data)
>   {
>   	struct intel_gmbus *bus = data;
> -	struct intel_uncore *uncore = &bus->i915->uncore;
> +	struct drm_i915_private *i915 = bus->i915;
>   	u32 reserved = get_reserved(bus);
>   
> -	intel_uncore_write_notrace(uncore,
> -				   bus->gpio_reg,
> -				   reserved | GPIO_DATA_DIR_MASK);
> -	intel_uncore_write_notrace(uncore, bus->gpio_reg, reserved);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved | GPIO_DATA_DIR_MASK);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved);
>   
> -	return (intel_uncore_read_notrace(uncore, bus->gpio_reg) &
> -		GPIO_DATA_VAL_IN) != 0;
> +	return (intel_de_read_notrace(i915, bus->gpio_reg) & GPIO_DATA_VAL_IN) != 0;
>   }
>   
>   static void set_clock(void *data, int state_high)
>   {
>   	struct intel_gmbus *bus = data;
> -	struct intel_uncore *uncore = &bus->i915->uncore;
> +	struct drm_i915_private *i915 = bus->i915;
>   	u32 reserved = get_reserved(bus);
>   	u32 clock_bits;
>   
> @@ -310,16 +302,14 @@ static void set_clock(void *data, int state_high)
>   		clock_bits = GPIO_CLOCK_DIR_OUT | GPIO_CLOCK_DIR_MASK |
>   			     GPIO_CLOCK_VAL_MASK;
>   
> -	intel_uncore_write_notrace(uncore,
> -				   bus->gpio_reg,
> -				   reserved | clock_bits);
> -	intel_uncore_posting_read(uncore, bus->gpio_reg);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved | clock_bits);
> +	intel_de_posting_read(i915, bus->gpio_reg);
>   }
>   
>   static void set_data(void *data, int state_high)
>   {
>   	struct intel_gmbus *bus = data;
> -	struct intel_uncore *uncore = &bus->i915->uncore;
> +	struct drm_i915_private *i915 = bus->i915;
>   	u32 reserved = get_reserved(bus);
>   	u32 data_bits;
>   
> @@ -329,8 +319,8 @@ static void set_data(void *data, int state_high)
>   		data_bits = GPIO_DATA_DIR_OUT | GPIO_DATA_DIR_MASK |
>   			GPIO_DATA_VAL_MASK;
>   
> -	intel_uncore_write_notrace(uncore, bus->gpio_reg, reserved | data_bits);
> -	intel_uncore_posting_read(uncore, bus->gpio_reg);
> +	intel_de_write_notrace(i915, bus->gpio_reg, reserved | data_bits);
> +	intel_de_posting_read(i915, bus->gpio_reg);
>   }
>   
>   static int
> @@ -439,9 +429,7 @@ gmbus_wait_idle(struct drm_i915_private *i915)
>   	add_wait_queue(&i915->display.gmbus.wait_queue, &wait);
>   	intel_de_write_fw(i915, GMBUS4(i915), irq_enable);
>   
> -	ret = intel_wait_for_register_fw(&i915->uncore,
> -					 GMBUS2(i915), GMBUS_ACTIVE, 0,
> -					 10);
> +	ret = intel_de_wait_for_register_fw(i915, GMBUS2(i915), GMBUS_ACTIVE, 0, 10);
>   
>   	intel_de_write_fw(i915, GMBUS4(i915), 0);
>   	remove_wait_queue(&i915->display.gmbus.wait_queue, &wait);