On Thu, 15 Sep 2016, Deepak M <m.deepak@xxxxxxxxx> wrote:
> Adding the ddb size into the devide info will avoid
> platform checks while computing wm.
>
> v2: Added comment and WARN_ON if ddb size is zero.(Jani)
> v3: Added WARN_ON at the right place.(Jani)
>
> Suggested-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
> Signed-off-by: Deepak M <m.deepak@xxxxxxxxx>
Pushed to drm-intel-next-queued, thanks for the patch.
BR,
Jani.
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_pci.c | 5 +++++
> drivers/gpu/drm/i915/intel_pm.c | 13 ++-----------
> 3 files changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 1e2dda8..6014c3a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -710,6 +710,7 @@ struct intel_device_info {
> u8 ring_mask; /* Rings supported by the HW */
> u8 num_rings;
> DEV_INFO_FOR_EACH_FLAG(DEFINE_FLAG, SEP_SEMICOLON);
> + u16 ddb_size; /* in blocks */
> /* Register offsets for the various display pipes and transcoders */
> int pipe_offsets[I915_MAX_TRANSCODERS];
> int trans_offsets[I915_MAX_TRANSCODERS];
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index d771870d..687c768 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -328,6 +328,7 @@ static const struct intel_device_info intel_skylake_info = {
> .gen = 9,
> .has_csr = 1,
> .has_guc = 1,
> + .ddb_size = 896,
> };
>
> static const struct intel_device_info intel_skylake_gt3_info = {
> @@ -336,6 +337,7 @@ static const struct intel_device_info intel_skylake_gt3_info = {
> .gen = 9,
> .has_csr = 1,
> .has_guc = 1,
> + .ddb_size = 896,
> .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> };
>
> @@ -358,6 +360,7 @@ static const struct intel_device_info intel_broxton_info = {
> .has_hw_contexts = 1,
> .has_logical_ring_contexts = 1,
> .has_guc = 1,
> + .ddb_size = 512,
> GEN_DEFAULT_PIPEOFFSETS,
> IVB_CURSOR_OFFSETS,
> BDW_COLORS,
> @@ -369,6 +372,7 @@ static const struct intel_device_info intel_kabylake_info = {
> .gen = 9,
> .has_csr = 1,
> .has_guc = 1,
> + .ddb_size = 896,
> };
>
> static const struct intel_device_info intel_kabylake_gt3_info = {
> @@ -377,6 +381,7 @@ static const struct intel_device_info intel_kabylake_gt3_info = {
> .gen = 9,
> .has_csr = 1,
> .has_guc = 1,
> + .ddb_size = 896,
> .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> };
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 6af438f..2df06b7 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2853,13 +2853,6 @@ bool ilk_disable_lp_wm(struct drm_device *dev)
> return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
> }
>
> -/*
> - * On gen9, we need to allocate Display Data Buffer (DDB) portions to the
> - * different active planes.
> - */
> -
> -#define SKL_DDB_SIZE 896 /* in blocks */
> -#define BXT_DDB_SIZE 512
> #define SKL_SAGV_BLOCK_TIME 30 /* µs */
>
> /*
> @@ -3057,10 +3050,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
> else
> *num_active = hweight32(dev_priv->active_crtcs);
>
> - if (IS_BROXTON(dev))
> - ddb_size = BXT_DDB_SIZE;
> - else
> - ddb_size = SKL_DDB_SIZE;
> + ddb_size = INTEL_INFO(dev_priv)->ddb_size;
> + WARN_ON(ddb_size == 0);
>
> ddb_size -= 4; /* 4 blocks for bypass path allocation */
--
Jani Nikula, Intel Open Source Technology Center
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