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drm/i915/skl: Support for edp low_vswing param in vbt 

v2: Adding VBT version check for low_vswing field, and correcting parsing

v3: (Damien)
 - Restrain the scope of the 'vswing' variable
 - Use the more idiomatic "ev_priv->vbt.edp_low_vswing = vswing == 0;"
  instead of if (foo) var = true; else var = false;
 - Shorten edp_vswing_premph_setting to edp_vswing_premph to fit in 80 chars
 - Add the version from which the edp_vswing_premph field is valid in the
  struct definition

Reviewed-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v2)
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sonika Jindal 2015-02-25 10:29:11 +05:30 committed by Daniel Vetter
parent ba0635ffb7
commit 9a57f5bb71
3 changed files with 9 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1466,6 +1466,7 @@ struct intel_vbt_data {
bool edp_initialized;
bool edp_support;
int edp_bpp;
bool edp_low_vswing;
struct edp_power_seq edp_pps;
struct {

7
drivers/gpu/drm/i915/intel_bios.c
View File

@ -662,6 +662,13 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
edp_link_params->vswing);
break;
}
if (bdb->version >= 173) {
uint8_t vswing;
vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
dev_priv->vbt.edp_low_vswing = vswing == 0;
}
}
static void

1
drivers/gpu/drm/i915/intel_bios.h
View File

@ -554,6 +554,7 @@ struct bdb_edp {
/* ith bit indicates enabled/disabled for (i+1)th panel */
u16 edp_s3d_feature;
u16 edp_t3_optimization;
u64 edp_vswing_preemph; /* v173 */
} __packed;
struct psr_table {