On Wed, Jun 03, 2020 at 02:15:16PM -0700, Matt Roper wrote:
> RKL uses the same BW_BUDDY programming table as TGL, but programs the
> values into a single set BUDDY0 set of registers rather than the
> BUDDY1/BUDDY2 sets used by TGL.
>
> Bspec: 49218
> Cc: Aditya Swarup <aditya.swa...@intel.com>
> Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
> ---
> .../drm/i915/display/intel_display_power.c | 44 +++++++++++--------
> drivers/gpu/drm/i915/i915_reg.h | 14 ++++--
> 2 files changed, 35 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c
> b/drivers/gpu/drm/i915/display/intel_display_power.c
> index 72312b67b57a..2c1ce50b572b 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> @@ -5254,7 +5254,7 @@ static void tgl_bw_buddy_init(struct drm_i915_private
> *dev_priv)
> enum intel_dram_type type = dev_priv->dram_info.type;
> u8 num_channels = dev_priv->dram_info.num_channels;
> const struct buddy_page_mask *table;
> - int i;
> + int config, min_buddy, max_buddy, i;
>
> if (IS_TGL_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_B0))
> /* Wa_1409767108: tgl */
> @@ -5262,29 +5262,35 @@ static void tgl_bw_buddy_init(struct drm_i915_private
> *dev_priv)
> else
> table = tgl_buddy_page_masks;
>
> - for (i = 0; table[i].page_mask != 0; i++)
> - if (table[i].num_channels == num_channels &&
> - table[i].type == type)
> + if (IS_ROCKETLAKE(dev_priv)) {
> + min_buddy = max_buddy = 0;
> + } else {
> + min_buddy = 1;
> + max_buddy = 2;
> + }
> +
> + for (config = 0; table[config].page_mask != 0; config++)
> + if (table[config].num_channels == num_channels &&
> + table[config].type == type)
> break;
>
> - if (table[i].page_mask == 0) {
> + if (table[config].page_mask == 0) {
> drm_dbg(&dev_priv->drm,
> "Unknown memory configuration; disabling address buddy
> logic.\n");
> - intel_de_write(dev_priv, BW_BUDDY1_CTL, BW_BUDDY_DISABLE);
> - intel_de_write(dev_priv, BW_BUDDY2_CTL, BW_BUDDY_DISABLE);
> + for (i = min_buddy; i <= max_buddy; i++)
> + intel_de_write(dev_priv, BW_BUDDY_CTL(i),
> + BW_BUDDY_DISABLE);
> } else {
> - intel_de_write(dev_priv, BW_BUDDY1_PAGE_MASK,
> - table[i].page_mask);
> - intel_de_write(dev_priv, BW_BUDDY2_PAGE_MASK,
> - table[i].page_mask);
> -
> - /* Wa_22010178259:tgl */
> - intel_de_rmw(dev_priv, BW_BUDDY1_CTL,
> - BW_BUDDY_TLB_REQ_TIMER_MASK,
> - REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8));
> - intel_de_rmw(dev_priv, BW_BUDDY2_CTL,
> - BW_BUDDY_TLB_REQ_TIMER_MASK,
> - REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8));
> + for (i = min_buddy; i <= max_buddy; i++) {
> + intel_de_write(dev_priv, BW_BUDDY_PAGE_MASK(i),
> + table[config].page_mask);
> +
> + /* Wa_22010178259:tgl,rkl */
> + intel_de_rmw(dev_priv, BW_BUDDY_CTL(i),
> + BW_BUDDY_TLB_REQ_TIMER_MASK,
> + REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK,
> + 0x8));
We should be using REG_FIELD_PREP() in i915_reg.h to declare
TLB_REQ_TIMER value and then use the value here.
> + }
> }
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 578cfe11cbb9..3e79cefc510a 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7837,13 +7837,19 @@ enum {
> #define WAIT_FOR_PCH_RESET_ACK (1 << 1)
> #define WAIT_FOR_PCH_FLR_ACK (1 << 0)
>
> -#define BW_BUDDY1_CTL _MMIO(0x45140)
> -#define BW_BUDDY2_CTL _MMIO(0x45150)
> +#define _BW_BUDDY0_CTL 0x45130
> +#define _BW_BUDDY1_CTL 0x45140
> +#define BW_BUDDY_CTL(x) _MMIO(_PICK_EVEN(x, \
> + _BW_BUDDY0_CTL, \
> + _BW_BUDDY1_CTL))
> #define BW_BUDDY_DISABLE REG_BIT(31)
> #define BW_BUDDY_TLB_REQ_TIMER_MASK REG_GENMASK(21, 16)
>
> -#define BW_BUDDY1_PAGE_MASK _MMIO(0x45144)
> -#define BW_BUDDY2_PAGE_MASK _MMIO(0x45154)
> +#define _BW_BUDDY0_PAGE_MASK 0x45134
> +#define _BW_BUDDY1_PAGE_MASK 0x45144
> +#define BW_BUDDY_PAGE_MASK(x) _MMIO(_PICK_EVEN(x, \
> + _BW_BUDDY0_PAGE_MASK, \
> + _BW_BUDDY1_PAGE_MASK))
>
> #define HSW_NDE_RSTWRN_OPT _MMIO(0x46408)
> #define RESET_PCH_HANDSHAKE_ENABLE (1 << 4)
> --
> 2.24.1
>
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