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author | Sean Paul <seanpaul@chromium.org> | 2017-07-17 11:43:05 -0400 |
---|---|---|
committer | Sean Paul <seanpaul@chromium.org> | 2017-07-17 11:56:07 -0400 |
commit | ef434a0c2ce765ad33026375db7d23aebd5e9532 (patch) | |
tree | 4bdac59f0bac3a6508741e6bd62da6e770fc3bc1 /drivers/gpu/drm/i915/intel_dp_aux_backlight.c | |
parent | dma-buf/fence: Avoid use of uninitialised timestamp (diff) | |
parent | drm/vc4: Fix VBLANK handling in crtc->enable() path (diff) | |
download | linux-dev-ef434a0c2ce765ad33026375db7d23aebd5e9532.tar.xz linux-dev-ef434a0c2ce765ad33026375db7d23aebd5e9532.zip |
Merge branch 'drm-misc-next-fixes' into drm-misc-fixes
Pick up
1ed134e6526b drm/vc4: Fix VBLANK handling in crtc->enable() path
From drm-misc-next-fixes, it was applied after the last pull request
was sent from that branch. We'll send it through drm-fixes instead.
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp_aux_backlight.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 60 |
1 files changed, 43 insertions, 17 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c index 6532e226db29..228ca06d9f0b 100644 --- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c @@ -28,6 +28,10 @@ static void set_aux_backlight_enable(struct intel_dp *intel_dp, bool enable) { uint8_t reg_val = 0; + /* Early return when display use other mechanism to enable backlight. */ + if (!(intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP)) + return; + if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER, ®_val) < 0) { DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n", @@ -74,8 +78,9 @@ static uint32_t intel_dp_aux_get_backlight(struct intel_connector *connector) * 8-bit or 16 bit value (MSB and LSB) */ static void -intel_dp_aux_set_backlight(struct intel_connector *connector, u32 level) +intel_dp_aux_set_backlight(const struct drm_connector_state *conn_state, u32 level) { + struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base); uint8_t vals[2] = { 0x0 }; @@ -93,24 +98,48 @@ intel_dp_aux_set_backlight(struct intel_connector *connector, u32 level) } } -static void intel_dp_aux_enable_backlight(struct intel_connector *connector) +static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) { + struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base); uint8_t dpcd_buf = 0; + uint8_t edp_backlight_mode = 0; - set_aux_backlight_enable(intel_dp, true); + if (drm_dp_dpcd_readb(&intel_dp->aux, + DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) != 1) { + DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n", + DP_EDP_BACKLIGHT_MODE_SET_REGISTER); + return; + } + + edp_backlight_mode = dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK; + + switch (edp_backlight_mode) { + case DP_EDP_BACKLIGHT_CONTROL_MODE_PWM: + case DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET: + case DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT: + dpcd_buf &= ~DP_EDP_BACKLIGHT_CONTROL_MODE_MASK; + dpcd_buf |= DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD; + if (drm_dp_dpcd_writeb(&intel_dp->aux, + DP_EDP_BACKLIGHT_MODE_SET_REGISTER, dpcd_buf) < 0) { + DRM_DEBUG_KMS("Failed to write aux backlight mode\n"); + } + break; + + /* Do nothing when it is already DPCD mode */ + case DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD: + default: + break; + } - if ((drm_dp_dpcd_readb(&intel_dp->aux, - DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) == 1) && - ((dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK) == - DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET)) - drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, - (dpcd_buf | DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD)); + set_aux_backlight_enable(intel_dp, true); + intel_dp_aux_set_backlight(conn_state, connector->panel.backlight.level); } -static void intel_dp_aux_disable_backlight(struct intel_connector *connector) +static void intel_dp_aux_disable_backlight(const struct drm_connector_state *old_conn_state) { - set_aux_backlight_enable(enc_to_intel_dp(&connector->encoder->base), false); + set_aux_backlight_enable(enc_to_intel_dp(old_conn_state->best_encoder), false); } static int intel_dp_aux_setup_backlight(struct intel_connector *connector, @@ -119,8 +148,6 @@ static int intel_dp_aux_setup_backlight(struct intel_connector *connector, struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base); struct intel_panel *panel = &connector->panel; - intel_dp_aux_enable_backlight(connector); - if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT) panel->backlight.max = 0xFFFF; else @@ -139,13 +166,12 @@ intel_dp_aux_display_control_capable(struct intel_connector *connector) { struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base); - /* Check the eDP Display control capabilities registers to determine if + /* Check the eDP Display control capabilities registers to determine if * the panel can support backlight control over the aux channel */ if (intel_dp->edp_dpcd[1] & DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP && - (intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) && - !((intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_PIN_ENABLE_CAP) || - (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP))) { + (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP) && + !(intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP)) { DRM_DEBUG_KMS("AUX Backlight Control Supported!\n"); return true; } |