From bfd7ebdac3c303ea2ee1abd781ee3fda82321a92 Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Fri, 14 Nov 2014 08:52:30 -0800 Subject: [PATCH] drm/i915: Parse VBT PSR block. PSR (aka SRD) block is defined at VBT and currently being used. Mainly/At-least to configure the amount of idle_frames require to get back to PSR Entry. Signed-off-by: Rodrigo Vivi Reviewed-by: Durgadoss R Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.h | 16 +++++++++++ drivers/gpu/drm/i915/intel_bios.c | 45 +++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_bios.h | 22 ++++++++++++++- 3 files changed, 82 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index bb1892d72efe..c7f00a452f55 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1306,6 +1306,13 @@ enum drrs_support_type { SEAMLESS_DRRS_SUPPORT = 2 }; +enum psr_lines_to_wait { + PSR_0_LINES_TO_WAIT = 0, + PSR_1_LINE_TO_WAIT, + PSR_4_LINES_TO_WAIT, + PSR_8_LINES_TO_WAIT +}; + struct intel_vbt_data { struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */ struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */ @@ -1334,6 +1341,15 @@ struct intel_vbt_data { int edp_bpp; struct edp_power_seq edp_pps; + struct { + bool full_link; + bool require_aux_wakeup; + int idle_frames; + enum psr_lines_to_wait lines_to_wait; + int tp1_wakeup_time; + int tp2_tp3_wakeup_time; + } psr; + struct { u16 pwm_freq_hz; bool present; diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index a4bd90f36a03..3f178258d9f9 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -664,6 +664,50 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) } } +static void +parse_psr(struct drm_i915_private *dev_priv, struct bdb_header *bdb) +{ + struct bdb_psr *psr; + struct psr_table *psr_table; + + psr = find_section(bdb, BDB_PSR); + if (!psr) { + DRM_DEBUG_KMS("No PSR BDB found.\n"); + return; + } + + psr_table = &psr->psr_table[panel_type]; + + dev_priv->vbt.psr.full_link = psr_table->full_link; + dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup; + + /* Allowed VBT values goes from 0 to 15 */ + dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 : + psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames; + + switch (psr_table->lines_to_wait) { + case 0: + dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT; + break; + case 1: + dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT; + break; + case 2: + dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT; + break; + case 3: + dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT; + break; + default: + DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n", + psr_table->lines_to_wait); + break; + } + + dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time; + dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time; +} + static u8 *goto_next_sequence(u8 *data, int *size) { u16 len; @@ -1241,6 +1285,7 @@ intel_parse_bios(struct drm_device *dev) parse_device_mapping(dev_priv, bdb); parse_driver_features(dev_priv, bdb); parse_edp(dev_priv, bdb); + parse_psr(dev_priv, bdb); parse_mipi(dev_priv, bdb); parse_ddi_ports(dev_priv, bdb); diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h index 7603765c91fc..de01167d8a51 100644 --- a/drivers/gpu/drm/i915/intel_bios.h +++ b/drivers/gpu/drm/i915/intel_bios.h @@ -80,7 +80,7 @@ struct vbios_data { #define BDB_EXT_MMIO_REGS 6 #define BDB_SWF_IO 7 #define BDB_SWF_MMIO 8 -#define BDB_DOT_CLOCK_TABLE 9 +#define BDB_PSR 9 #define BDB_MODE_REMOVAL_TABLE 10 #define BDB_CHILD_DEVICE_TABLE 11 #define BDB_DRIVER_FEATURES 12 @@ -556,6 +556,26 @@ struct bdb_edp { u16 edp_t3_optimization; } __packed; +struct psr_table { + /* Feature bits */ + u8 full_link:1; + u8 require_aux_to_wakeup:1; + u8 feature_bits_rsvd:6; + + /* Wait times */ + u8 idle_frames:4; + u8 lines_to_wait:3; + u8 wait_times_rsvd:1; + + /* TP wake up time in multiple of 100 */ + u16 tp1_wakeup_time; + u16 tp2_tp3_wakeup_time; +} __packed; + +struct bdb_psr { + struct psr_table psr_table[16]; +} __packed; + void intel_setup_bios(struct drm_device *dev); int intel_parse_bios(struct drm_device *dev); -- 2.20.1