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drm/i915: Parse max link rate from the eDP BDB block

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The eDP BDB block has gained yet another max link rate field.
Let's parse it and consult it during the source rate filtering.

v2: *20 instead of *2 to get the correct units (Jani)

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220602205723.11341-1-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä
2022-06-02 23:57:23 +03:00
parent f06d1d66d5
commit 24b8b74eb2
4 changed files with 27 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/intel_bios.c
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@@ -1460,6 +1460,10 @@ parse_edp(struct drm_i915_private *i915,
panel->vbt.edp.drrs_msa_timing_delay =
(edp->sdrrs_msa_timing_delay >> (panel_type * 2)) & 3;
if (i915->vbt.version >= 244)
panel->vbt.edp.max_link_rate =
edp->edp_max_port_link_rate[panel_type] * 20;
}
static void

1
drivers/gpu/drm/i915/display/intel_display_types.h
View File

@@ -300,6 +300,7 @@ struct intel_vbt_panel_data {
enum drrs_type drrs_type;
struct {
int max_link_rate;
int rate;
int lanes;
int preemphasis;

23
drivers/gpu/drm/i915/display/intel_dp.c
View File

@@ -407,6 +407,26 @@ static int ehl_max_source_rate(struct intel_dp *intel_dp)
return 810000;
}
static int vbt_max_link_rate(struct intel_dp *intel_dp)
{
struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
int max_rate;
max_rate = intel_bios_dp_max_link_rate(encoder);
if (intel_dp_is_edp(intel_dp)) {
struct intel_connector *connector = intel_dp->attached_connector;
int edp_max_rate = connector->panel.vbt.edp.max_link_rate;
if (max_rate && edp_max_rate)
max_rate = min(max_rate, edp_max_rate);
else if (edp_max_rate)
max_rate = edp_max_rate;
}
return max_rate;
}
static void
intel_dp_set_source_rates(struct intel_dp *intel_dp)
{
@@ -428,7 +448,6 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp)
162000, 270000
};
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct intel_encoder *encoder = &dig_port->base;
struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
const int *source_rates;
int size, max_rate = 0, vbt_max_rate;
@@ -464,7 +483,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp)
size = ARRAY_SIZE(g4x_rates);
}
vbt_max_rate = intel_bios_dp_max_link_rate(encoder);
vbt_max_rate = vbt_max_link_rate(intel_dp);
if (max_rate && vbt_max_rate)
max_rate = min(max_rate, vbt_max_rate);
else if (vbt_max_rate)

1
drivers/gpu/drm/i915/display/intel_vbt_defs.h
View File

@@ -697,6 +697,7 @@ struct bdb_edp {
u16 apical_enable; /* 203 */
struct edp_apical_params apical_params[16]; /* 203 */
u16 edp_fast_link_training_rate[16]; /* 224 */
u16 edp_max_port_link_rate[16]; /* 244 */
} __packed;
/*