[Intel-gfx] [PATCH 2/3] drm/i915: Add DCS control for Panel PWM
Jani Nikula
jani.nikula at intel.com
Tue May 17 14:01:52 UTC 2016
On Tue, 26 Apr 2016, "Adebisi, YetundeX" <yetundex.adebisi at intel.com> wrote:
>> -----Original Message-----
>> From: Nikula, Jani
>> Sent: Tuesday, April 26, 2016 2:14 PM
>> To: intel-gfx at lists.freedesktop.org
>> Cc: Nikula, Jani; Vetter, Daniel; Adebisi, YetundeX; Deepak, M
>> Subject: [PATCH 2/3] drm/i915: Add DCS control for Panel PWM
>>
>> If the source of the backlight PWM is from the
>> panel then the PWM can be controlled by DCS
>> command, this patch adds the support to
>> enable/disbale panel PWM, control backlight level
>> etc...
>>
>> v2: Moving the CABC bkl functions to new file.(Jani)
>>
>> v3: Rebase
>>
>> v4: Rebase
>>
>> v5: Use mipi_dsi_dcs_write() instead of mipi_dsi_dcs_write_buffer() (Jani)
>> Move DCS macro`s to include/video/mipi_display.h (Jani)
>>
>> v6: Rename the file to intel_dsi_panel_pwm.c
>> Removing the CABC operations
>>
>> v7 by Jani: renames, rebases, etc.
>>
>> v8 by Jani: s/INTEL_BACKLIGHT_CABC/INTEL_BACKLIGHT_DSI_DCS/
>>
>> v9 by Jani: rename init function to intel_dsi_dcs_init_backlight_funcs
>>
>> Cc: Jani Nikula <jani.nikula at intel.com>
>> Cc: Daniel Vetter <daniel.vetter at intel.com>
>> Cc: Yetunde Adebisi <yetundex.adebisi at intel.com>
>> Signed-off-by: Deepak M <m.deepak at intel.com>
>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>
> Reviewed-by: Yetunde Adebisi <yetundex.adebisi at intel.com>
Pushed both to drm-intel-next-queued, thanks for the review.
BR,
Jani.
>> ---
>> drivers/gpu/drm/i915/Makefile | 1 +
>> drivers/gpu/drm/i915/intel_drv.h | 2 +
>> drivers/gpu/drm/i915/intel_dsi.c | 19 ++-
>> drivers/gpu/drm/i915/intel_dsi.h | 3 +
>> drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c | 157
>> +++++++++++++++++++++++++
>> drivers/gpu/drm/i915/intel_panel.c | 4 +
>> 6 files changed, 184 insertions(+), 2 deletions(-)
>> create mode 100644 drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
>>
>> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
>> index 723c50251127..b5ec800f953e 100644
>> --- a/drivers/gpu/drm/i915/Makefile
>> +++ b/drivers/gpu/drm/i915/Makefile
>> @@ -86,6 +86,7 @@ i915-y += dvo_ch7017.o \
>> intel_dp_mst.o \
>> intel_dp.o \
>> intel_dsi.o \
>> + intel_dsi_dcs_backlight.o \
>> intel_dsi_panel_vbt.o \
>> intel_dsi_pll.o \
>> intel_dvo.o \
>> diff --git a/drivers/gpu/drm/i915/intel_drv.h
>> b/drivers/gpu/drm/i915/intel_drv.h
>> index cb89a35a6755..d65dfbb8cf7d 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -1346,6 +1346,8 @@ void intel_dp_mst_encoder_cleanup(struct
>> intel_digital_port *intel_dig_port);
>> /* intel_dsi.c */
>> void intel_dsi_init(struct drm_device *dev);
>>
>> +/* intel_dsi_dcs_backlight.c */
>> +int intel_dsi_dcs_init_backlight_funcs(struct intel_connector
>> *intel_connector);
>>
>> /* intel_dvo.c */
>> void intel_dvo_init(struct drm_device *dev);
>> diff --git a/drivers/gpu/drm/i915/intel_dsi.c
>> b/drivers/gpu/drm/i915/intel_dsi.c
>> index 2b22bb9bb86f..2209f9fe6c4b 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi.c
>> +++ b/drivers/gpu/drm/i915/intel_dsi.c
>> @@ -1364,10 +1364,25 @@ void intel_dsi_init(struct drm_device *dev)
>> else
>> intel_encoder->crtc_mask = BIT(PIPE_B);
>>
>> - if (dev_priv->vbt.dsi.config->dual_link)
>> + if (dev_priv->vbt.dsi.config->dual_link) {
>> intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
>> - else
>> +
>> + switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
>> + case DL_DCS_PORT_A:
>> + intel_dsi->dcs_backlight_ports = BIT(PORT_A);
>> + break;
>> + case DL_DCS_PORT_C:
>> + intel_dsi->dcs_backlight_ports = BIT(PORT_C);
>> + break;
>> + default:
>> + case DL_DCS_PORT_A_AND_C:
>> + intel_dsi->dcs_backlight_ports = BIT(PORT_A) |
>> BIT(PORT_C);
>> + break;
>> + }
>> + } else {
>> intel_dsi->ports = BIT(port);
>> + intel_dsi->dcs_backlight_ports = BIT(port);
>> + }
>>
>> /* Create a DSI host (and a device) for each port. */
>> for_each_dsi_port(port, intel_dsi->ports) {
>> diff --git a/drivers/gpu/drm/i915/intel_dsi.h
>> b/drivers/gpu/drm/i915/intel_dsi.h
>> index 61a6957fc6c2..b00fb3fbb0b1 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi.h
>> +++ b/drivers/gpu/drm/i915/intel_dsi.h
>> @@ -78,6 +78,9 @@ struct intel_dsi {
>>
>> u8 escape_clk_div;
>> u8 dual_link;
>> +
>> + u16 dcs_backlight_ports;
>> +
>> u8 pixel_overlap;
>> u32 port_bits;
>> u32 bw_timer;
>> diff --git a/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
>> b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
>> new file mode 100644
>> index 000000000000..7f9bbffa7f8c
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
>> @@ -0,0 +1,157 @@
>> +/*
>> + * 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 "intel_drv.h"
>> +#include "intel_dsi.h"
>> +#include "i915_drv.h"
>> +#include <video/mipi_display.h>
>> +#include <drm/drm_mipi_dsi.h>
>> +
>> +#define CONTROL_DISPLAY_BCTRL (1 << 5)
>> +#define CONTROL_DISPLAY_DD (1 << 3)
>> +#define CONTROL_DISPLAY_BL (1 << 2)
>> +
>> +#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;
>> + 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(struct intel_connector *connector, u32 level)
>> +{
>> + 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 = 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(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;
>> + enum port port;
>> +
>> + dcs_set_backlight(connector, 0);
>> +
>> + 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(struct intel_connector *connector)
>> +{
>> + struct intel_encoder *encoder = connector->encoder;
>> + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
>> + struct intel_panel *panel = &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));
>> + }
>> +
>> + dcs_set_backlight(connector, 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 = dev->dev_private;
>> + 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;
>> +}
>> diff --git a/drivers/gpu/drm/i915/intel_panel.c
>> b/drivers/gpu/drm/i915/intel_panel.c
>> index 828f0fcaaaf8..efaee7a7f933 100644
>> --- a/drivers/gpu/drm/i915/intel_panel.c
>> +++ b/drivers/gpu/drm/i915/intel_panel.c
>> @@ -1722,6 +1722,10 @@ intel_panel_init_backlight_funcs(struct
>> intel_panel *panel)
>> intel_dp_aux_init_backlight_funcs(connector) == 0)
>> return;
>>
>> + if (connector->base.connector_type ==
>> DRM_MODE_CONNECTOR_DSI &&
>> + intel_dsi_dcs_init_backlight_funcs(connector) == 0)
>> + return;
>> +
>> if (IS_BROXTON(dev_priv)) {
>> panel->backlight.setup = bxt_setup_backlight;
>> panel->backlight.enable = bxt_enable_backlight;
>> --
>> 2.1.4
>
--
Jani Nikula, Intel Open Source Technology Center
More information about the Intel-gfx
mailing list