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/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Deepak M <m.deepak at intel.com>
*/
#include <drm/drm_mipi_dsi.h>
#include <video/mipi_display.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "intel_dsi.h"
#include "intel_dsi_dcs_backlight.h"
#define CONTROL_DISPLAY_BCTRL (1 << 5)
#define CONTROL_DISPLAY_DD (1 << 3)
#define CONTROL_DISPLAY_BL (1 << 2)
#define POWER_SAVE_OFF (0 << 0)
#define POWER_SAVE_LOW (1 << 0)
#define POWER_SAVE_MEDIUM (2 << 0)
#define POWER_SAVE_HIGH (3 << 0)
#define POWER_SAVE_OUTDOOR_MODE (4 << 0)
#define PANEL_PWM_MAX_VALUE 0xFF
static u32 dcs_get_backlight(struct intel_connector *connector)
{
struct intel_encoder *encoder = connector->encoder;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct mipi_dsi_device *dsi_device;
u8 data = 0;
enum port port;
/* FIXME: Need to take care of 16 bit brightness level */
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
&data, sizeof(data));
break;
}
return data;
}
static void dcs_set_backlight(const struct drm_connector_state *conn_state, u32 level)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(conn_state->best_encoder);
struct mipi_dsi_device *dsi_device;
u8 data = level;
enum port port;
/* FIXME: Need to take care of 16 bit brightness level */
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
&data, sizeof(data));
}
}
static void dcs_disable_backlight(const struct drm_connector_state *conn_state)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(conn_state->best_encoder);
struct mipi_dsi_device *dsi_device;
enum port port;
dcs_set_backlight(conn_state, 0);
for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) {
u8 cabc = POWER_SAVE_OFF;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE,
&cabc, sizeof(cabc));
}
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
u8 ctrl = 0;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
ctrl &= ~CONTROL_DISPLAY_BL;
ctrl &= ~CONTROL_DISPLAY_DD;
ctrl &= ~CONTROL_DISPLAY_BCTRL;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
}
}
static void dcs_enable_backlight(const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(conn_state->best_encoder);
struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel;
struct mipi_dsi_device *dsi_device;
enum port port;
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
u8 ctrl = 0;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
ctrl |= CONTROL_DISPLAY_BL;
ctrl |= CONTROL_DISPLAY_DD;
ctrl |= CONTROL_DISPLAY_BCTRL;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
}
for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) {
u8 cabc = POWER_SAVE_MEDIUM;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE,
&cabc, sizeof(cabc));
}
dcs_set_backlight(conn_state, panel->backlight.level);
}
static int dcs_setup_backlight(struct intel_connector *connector,
enum pipe unused)
{
struct intel_panel *panel = &connector->panel;
panel->backlight.max = PANEL_PWM_MAX_VALUE;
panel->backlight.level = PANEL_PWM_MAX_VALUE;
return 0;
}
int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector)
{
struct drm_device *dev = intel_connector->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_encoder *encoder = intel_connector->encoder;
struct intel_panel *panel = &intel_connector->panel;
if (dev_priv->vbt.backlight.type != INTEL_BACKLIGHT_DSI_DCS)
return -ENODEV;
if (WARN_ON(encoder->type != INTEL_OUTPUT_DSI))
return -EINVAL;
panel->backlight.setup = dcs_setup_backlight;
panel->backlight.enable = dcs_enable_backlight;
panel->backlight.disable = dcs_disable_backlight;
panel->backlight.set = dcs_set_backlight;
panel->backlight.get = dcs_get_backlight;
return 0;
}
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