198 lines
6.0 KiB
C
198 lines
6.0 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Deepak M <m.deepak at intel.com>
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*/
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#include <drm/drm_mipi_dsi.h>
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#include <video/mipi_display.h>
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#include "i915_drv.h"
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#include "intel_display_types.h"
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#include "intel_dsi.h"
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#include "intel_dsi_dcs_backlight.h"
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#define CONTROL_DISPLAY_BCTRL (1 << 5)
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#define CONTROL_DISPLAY_DD (1 << 3)
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#define CONTROL_DISPLAY_BL (1 << 2)
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#define POWER_SAVE_OFF (0 << 0)
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#define POWER_SAVE_LOW (1 << 0)
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#define POWER_SAVE_MEDIUM (2 << 0)
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#define POWER_SAVE_HIGH (3 << 0)
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#define POWER_SAVE_OUTDOOR_MODE (4 << 0)
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#define PANEL_PWM_MAX_VALUE 0xFF
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static u32 dcs_get_backlight(struct intel_connector *connector, enum pipe unused)
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{
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struct intel_encoder *encoder = intel_attached_encoder(connector);
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
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struct intel_panel *panel = &connector->panel;
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struct mipi_dsi_device *dsi_device;
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u8 data[2] = {};
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enum port port;
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size_t len = panel->backlight.max > U8_MAX ? 2 : 1;
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for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
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&data, len);
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break;
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}
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return (data[1] << 8) | data[0];
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}
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static void dcs_set_backlight(const struct drm_connector_state *conn_state, u32 level)
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{
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder));
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struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel;
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struct mipi_dsi_device *dsi_device;
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u8 data[2] = {};
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enum port port;
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size_t len = panel->backlight.max > U8_MAX ? 2 : 1;
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if (len == 1) {
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data[0] = level;
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} else {
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data[0] = level >> 8;
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data[1] = level;
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}
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for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
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&data, len);
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}
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}
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static void dcs_disable_backlight(const struct drm_connector_state *conn_state, u32 level)
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{
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder));
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struct mipi_dsi_device *dsi_device;
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enum port port;
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dcs_set_backlight(conn_state, 0);
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for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) {
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u8 cabc = POWER_SAVE_OFF;
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE,
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&cabc, sizeof(cabc));
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}
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for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
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u8 ctrl = 0;
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
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&ctrl, sizeof(ctrl));
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ctrl &= ~CONTROL_DISPLAY_BL;
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ctrl &= ~CONTROL_DISPLAY_DD;
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ctrl &= ~CONTROL_DISPLAY_BCTRL;
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mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
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&ctrl, sizeof(ctrl));
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}
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}
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static void dcs_enable_backlight(const struct intel_crtc_state *crtc_state,
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const struct drm_connector_state *conn_state, u32 level)
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{
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder));
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struct mipi_dsi_device *dsi_device;
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enum port port;
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for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
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u8 ctrl = 0;
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
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&ctrl, sizeof(ctrl));
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ctrl |= CONTROL_DISPLAY_BL;
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ctrl |= CONTROL_DISPLAY_DD;
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ctrl |= CONTROL_DISPLAY_BCTRL;
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mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
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&ctrl, sizeof(ctrl));
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}
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for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) {
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u8 cabc = POWER_SAVE_MEDIUM;
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dsi_device = intel_dsi->dsi_hosts[port]->device;
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mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE,
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&cabc, sizeof(cabc));
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}
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dcs_set_backlight(conn_state, level);
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}
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static int dcs_setup_backlight(struct intel_connector *connector,
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enum pipe unused)
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{
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struct drm_device *dev = connector->base.dev;
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct intel_panel *panel = &connector->panel;
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if (dev_priv->vbt.backlight.brightness_precision_bits > 8)
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panel->backlight.max = (1 << dev_priv->vbt.backlight.brightness_precision_bits) - 1;
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else
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panel->backlight.max = PANEL_PWM_MAX_VALUE;
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panel->backlight.level = panel->backlight.max;
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return 0;
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}
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static const struct intel_panel_bl_funcs dcs_bl_funcs = {
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.setup = dcs_setup_backlight,
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.enable = dcs_enable_backlight,
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.disable = dcs_disable_backlight,
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.set = dcs_set_backlight,
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.get = dcs_get_backlight,
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};
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int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector)
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{
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struct drm_device *dev = intel_connector->base.dev;
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct intel_encoder *encoder = intel_attached_encoder(intel_connector);
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struct intel_panel *panel = &intel_connector->panel;
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if (dev_priv->vbt.backlight.type != INTEL_BACKLIGHT_DSI_DCS)
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return -ENODEV;
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if (drm_WARN_ON(dev, encoder->type != INTEL_OUTPUT_DSI))
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return -EINVAL;
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panel->backlight.funcs = &dcs_bl_funcs;
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return 0;
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}
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