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| author | Suraj Kandpal <suraj.kandpal@intel.com> | 2024-05-07 09:34:07 +0530 |
|---|---|---|
| committer | Uma Shankar <uma.shankar@intel.com> | 2024-05-13 16:02:30 +0530 |
| commit | 84ceb14076592abd08d06d403ebe18aa60d5d505 (patch) | |
| tree | abe23cca7b6ff0485e330875b0265e525a3438c5 | |
| parent | b0944c983d274ac485f44f1b0d3a31a52fc3f6e2 (diff) | |
| download | linux-84ceb14076592abd08d06d403ebe18aa60d5d505.tar.gz linux-84ceb14076592abd08d06d403ebe18aa60d5d505.tar.bz2 linux-84ceb14076592abd08d06d403ebe18aa60d5d505.zip | |
drm/i915/dp: Write panel override luminance values
Write panel override luminance values which helps the TCON decide
if tone mapping needs to be enabled or not.
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240507040407.1056061-8-suraj.kandpal@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index da42f6704930..8ce60d53dcde 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -374,6 +374,29 @@ static const char *dpcd_vs_pwm_str(bool aux) return aux ? "DPCD" : "PWM"; } +static void +intel_dp_aux_write_panel_luminance_override(struct intel_connector *connector) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + int ret; + u8 buf[4] = {}; + + buf[0] = panel->backlight.min & 0xFF; + buf[1] = (panel->backlight.min & 0xFF00) >> 8; + buf[2] = panel->backlight.max & 0xFF; + buf[3] = (panel->backlight.max & 0xFF00) >> 8; + + ret = drm_dp_dpcd_write(&intel_dp->aux, + INTEL_EDP_HDR_PANEL_LUMINANCE_OVERRIDE, + buf, sizeof(buf)); + if (ret < 0) + drm_dbg_kms(&i915->drm, + "Panel Luminance DPCD reg write failed, err:-%d\n", + ret); +} + static int intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pipe) { @@ -405,6 +428,8 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi panel->backlight.min = 0; } + intel_dp_aux_write_panel_luminance_override(connector); + drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX HDR interface for backlight control (range %d..%d)\n", connector->base.base.id, connector->base.name, panel->backlight.min, panel->backlight.max); |