Re: [PATCH v2 17/21] drm/i915: Move HAS_FW_BLC definition to platform

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Jul 28, 2016 at 12:12:32PM -0700, Carlos Santa wrote:
> Moving all GPU features to the platform definition allows for
> 	- standard place when adding new features from new platforms
> 	- possible to see supported features when dumping struct
> 	  definitions
> 
> Signed-off-by: Carlos Santa <carlos.santa@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h | 3 ++-
>  drivers/gpu/drm/i915/i915_pci.c | 4 ++++
>  2 files changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 41283c5..510bab6 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -782,6 +782,7 @@ struct intel_csr {
>  	func(has_dp_mst) sep \
>  	func(has_aux_irq) sep \
>  	func(has_gmbus_irq) sep \
> +	func(has_fw_blc) sep \
>  	func(has_pipe_cxsr) sep \
>  	func(has_hotplug) sep \
>  	func(cursor_needs_physical) sep \
> @@ -2733,7 +2734,7 @@ struct drm_i915_cmd_table {
>  #define SUPPORTS_TV(dev)		(INTEL_INFO(dev)->supports_tv)
>  #define I915_HAS_HOTPLUG(dev)		 (INTEL_INFO(dev)->has_hotplug)
>  
> -#define HAS_FW_BLC(dev) (INTEL_INFO(dev)->gen > 2)
> +#define HAS_FW_BLC(dev) (INTEL_INFO(dev)->has_fw_blc)
>  #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr)
>  #define HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc)
>  
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 7a14f68..0df6911 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -85,6 +85,7 @@ static const struct intel_device_info intel_i865g_info = {
>  
>  #define GEN3_FEATURES \
>  	.gen = 3, .num_pipes = 2, \
> +	.has_fw_blc = 1, \
>  	.ring_mask = RENDER_RING, \
>  	GEN_DEFAULT_PIPEOFFSETS, \
>  	CURSOR_OFFSETS
> @@ -170,6 +171,7 @@ static const struct intel_device_info intel_pineview_info = {
>  	.need_gfx_hws = 1, .has_hotplug = 1, \
>  	.has_aux_irq = 1, \
>  	.has_gmbus_irq = 1, \
> +	.has_fw_blc = 1, \
>  	.ring_mask = RENDER_RING | BSD_RING, \
>  	GEN_DEFAULT_PIPEOFFSETS, \
>  	CURSOR_OFFSETS
> @@ -235,6 +237,7 @@ static const struct intel_device_info intel_ivybridge_q_info = {
>  	.has_rc6 = 1, \
>  	.has_aux_irq = 1, \
>  	.has_gmbus_irq = 1, \
> +	.has_fw_blc = 1, \
>  	.need_gfx_hws = 1, .has_hotplug = 1, \
>  	.ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
>  	.display_mmio_offset = VLV_DISPLAY_BASE, \
> @@ -315,6 +318,7 @@ static const struct intel_device_info intel_cherryview_info = {
>  	.has_rc6 = 1,
>  	.has_aux_irq = 1,
>  	.has_gmbus_irq = 1,
> +	.has_fw_blc = 1,

This patch is mosly bogus. HAS_FW_BLC should only be true for gen3, and
it should actually be called HAS_FW_BLC_SELF. Probably easiest to just
replace the only place it's used with IS_GEN3.

Hmm. That code looks partially bogus anyway. It forgets to program
FW_BLC_SELF on 915G. Looks like the spec is confusing too. The register
supposedly exits there, but there isn't a memory SR enable bit to found
anywhere for 915G. Unfortunately I don't have the hardware to find out
what's going on with that, so can't really fix it. Oh and it also fails
to handle the 945G/GM cpp=4 workaround. I guess I'll have to send a patch
for that at least...

>  	.display_mmio_offset = VLV_DISPLAY_BASE,
>  	GEN_CHV_PIPEOFFSETS,
>  	CURSOR_OFFSETS,
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel OTC
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