mirror of https://gitee.com/openkylin/linux.git
drm: Add Grain Media GM12U320 driver v2
Add a modesetting driver for Grain Media GM12U320 based devices (primarily Acer C120 projector, but there may be compatible devices). This is based on the fb driver from Viacheslav Nurmekhamitov: https://github.com/slavrn/gm12u320 This driver uses drm_simple_display_pipe to deal with all the atomic stuff, gem_shmem_helper functions for buffer management and drm_fbdev_generic_setup for fbdev emulation, so that leaves the driver itself with only the actual code for talking to the gm12u320 chip, leading to a nice simple and clean driver. Changes in v2: -Add drm-misc tree to MAINTAINERS -Drop mode_config.preferred_depth = 24 / fix fbdev support Reviewed-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190721132525.10396-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
parent
73415b4ea5
commit
e4f86e4371
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@ -5015,6 +5015,12 @@ S: Maintained
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F: drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
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F: Documentation/devicetree/bindings/display/panel/feiyang,fy07024di26a30d.txt
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DRM DRIVER FOR GRAIN MEDIA GM12U320 PROJECTORS
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M: Hans de Goede <hdegoede@redhat.com>
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T: git git://anongit.freedesktop.org/drm/drm-misc
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S: Maintained
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F: drivers/gpu/drm/gm12u320/
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DRM DRIVER FOR ILITEK ILI9225 PANELS
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M: David Lechner <david@lechnology.com>
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S: Maintained
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@ -354,6 +354,8 @@ source "drivers/gpu/drm/aspeed/Kconfig"
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source "drivers/gpu/drm/mcde/Kconfig"
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source "drivers/gpu/drm/gm12u320/Kconfig"
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# Keep legacy drivers last
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menuconfig DRM_LEGACY
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@ -120,3 +120,4 @@ obj-$(CONFIG_DRM_LIMA) += lima/
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obj-$(CONFIG_DRM_PANFROST) += panfrost/
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obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
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obj-$(CONFIG_DRM_MCDE) += mcde/
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obj-$(CONFIG_DRM_GM12U320) += gm12u320/
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@ -0,0 +1,9 @@
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# SPDX-License-Identifier: GPL-2.0+
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config DRM_GM12U320
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tristate "GM12U320 driver for USB projectors"
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depends on DRM && USB
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select DRM_KMS_HELPER
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select DRM_GEM_SHMEM_HELPER
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help
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This is a KMS driver for projectors which use the GM12U320 chipset
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for video transfer over USB2/3, such as the Acer C120 mini projector.
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@ -0,0 +1,2 @@
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# SPDX-License-Identifier: GPL-2.0+
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obj-$(CONFIG_DRM_GM12U320) += gm12u320.o
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@ -0,0 +1,814 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2019 Hans de Goede <hdegoede@redhat.com>
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*/
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#include <linux/dma-buf.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_atomic_state_helper.h>
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#include <drm/drm_connector.h>
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#include <drm/drm_damage_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_file.h>
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#include <drm/drm_format_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_ioctl.h>
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#include <drm/drm_modeset_helper_vtables.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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#include <drm/drm_vblank.h>
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static bool eco_mode;
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module_param(eco_mode, bool, 0644);
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MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)");
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#define DRIVER_NAME "gm12u320"
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#define DRIVER_DESC "Grain Media GM12U320 USB projector display"
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#define DRIVER_DATE "2019"
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#define DRIVER_MAJOR 1
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 1
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/*
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* The DLP has an actual width of 854 pixels, but that is not a multiple
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* of 8, breaking things left and right, so we export a width of 848.
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*/
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#define GM12U320_USER_WIDTH 848
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#define GM12U320_REAL_WIDTH 854
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#define GM12U320_HEIGHT 480
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#define GM12U320_BLOCK_COUNT 20
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#define MISC_RCV_EPT 1
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#define DATA_RCV_EPT 2
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#define DATA_SND_EPT 3
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#define MISC_SND_EPT 4
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#define DATA_BLOCK_HEADER_SIZE 84
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#define DATA_BLOCK_CONTENT_SIZE 64512
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#define DATA_BLOCK_FOOTER_SIZE 20
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#define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \
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DATA_BLOCK_CONTENT_SIZE + \
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DATA_BLOCK_FOOTER_SIZE)
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#define DATA_LAST_BLOCK_CONTENT_SIZE 4032
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#define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \
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DATA_LAST_BLOCK_CONTENT_SIZE + \
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DATA_BLOCK_FOOTER_SIZE)
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#define CMD_SIZE 31
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#define READ_STATUS_SIZE 13
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#define MISC_VALUE_SIZE 4
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#define CMD_TIMEOUT msecs_to_jiffies(200)
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#define DATA_TIMEOUT msecs_to_jiffies(1000)
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#define IDLE_TIMEOUT msecs_to_jiffies(2000)
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#define FIRST_FRAME_TIMEOUT msecs_to_jiffies(2000)
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#define MISC_REQ_GET_SET_ECO_A 0xff
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#define MISC_REQ_GET_SET_ECO_B 0x35
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/* Windows driver does once every second, with arg d = 1, other args 0 */
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#define MISC_REQ_UNKNOWN1_A 0xff
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#define MISC_REQ_UNKNOWN1_B 0x38
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/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */
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#define MISC_REQ_UNKNOWN2_A 0xa5
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#define MISC_REQ_UNKNOWN2_B 0x00
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struct gm12u320_device {
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struct drm_device dev;
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struct drm_simple_display_pipe pipe;
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struct drm_connector conn;
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struct usb_device *udev;
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unsigned char *cmd_buf;
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unsigned char *data_buf[GM12U320_BLOCK_COUNT];
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bool pipe_enabled;
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struct {
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bool run;
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struct workqueue_struct *workq;
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struct work_struct work;
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wait_queue_head_t waitq;
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struct mutex lock;
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struct drm_framebuffer *fb;
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struct drm_rect rect;
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} fb_update;
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};
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static const char cmd_data[CMD_SIZE] = {
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0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
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0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff,
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0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static const char cmd_draw[CMD_SIZE] = {
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0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe,
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0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,
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0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static const char cmd_misc[CMD_SIZE] = {
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0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
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0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd,
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0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00,
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0x01, 0x00, 0x00, 0xdb
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};
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static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00,
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0x01, 0x00, 0x00, 0xd7
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};
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static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = {
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0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x00, 0x00, 0x4f
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};
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static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
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{
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int i, block_size;
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const char *hdr;
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gm12u320->cmd_buf = kmalloc(CMD_SIZE, GFP_KERNEL);
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if (!gm12u320->cmd_buf)
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return -ENOMEM;
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for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {
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if (i == GM12U320_BLOCK_COUNT - 1) {
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block_size = DATA_LAST_BLOCK_SIZE;
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hdr = data_last_block_header;
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} else {
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block_size = DATA_BLOCK_SIZE;
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hdr = data_block_header;
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}
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gm12u320->data_buf[i] = kzalloc(block_size, GFP_KERNEL);
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if (!gm12u320->data_buf[i])
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return -ENOMEM;
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memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE);
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memcpy(gm12u320->data_buf[i] +
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(block_size - DATA_BLOCK_FOOTER_SIZE),
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data_block_footer, DATA_BLOCK_FOOTER_SIZE);
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}
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gm12u320->fb_update.workq = create_singlethread_workqueue(DRIVER_NAME);
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if (!gm12u320->fb_update.workq)
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return -ENOMEM;
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return 0;
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}
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static void gm12u320_usb_free(struct gm12u320_device *gm12u320)
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{
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int i;
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if (gm12u320->fb_update.workq)
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destroy_workqueue(gm12u320->fb_update.workq);
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for (i = 0; i < GM12U320_BLOCK_COUNT; i++)
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kfree(gm12u320->data_buf[i]);
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kfree(gm12u320->cmd_buf);
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}
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static int gm12u320_misc_request(struct gm12u320_device *gm12u320,
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u8 req_a, u8 req_b,
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u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d)
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{
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int ret, len;
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memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE);
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gm12u320->cmd_buf[20] = req_a;
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gm12u320->cmd_buf[21] = req_b;
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gm12u320->cmd_buf[22] = arg_a;
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gm12u320->cmd_buf[23] = arg_b;
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gm12u320->cmd_buf[24] = arg_c;
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gm12u320->cmd_buf[25] = arg_d;
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/* Send request */
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ret = usb_bulk_msg(gm12u320->udev,
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usb_sndbulkpipe(gm12u320->udev, MISC_SND_EPT),
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gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
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if (ret || len != CMD_SIZE) {
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dev_err(&gm12u320->udev->dev, "Misc. req. error %d\n", ret);
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return -EIO;
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}
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/* Read value */
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ret = usb_bulk_msg(gm12u320->udev,
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usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
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gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,
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DATA_TIMEOUT);
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if (ret || len != MISC_VALUE_SIZE) {
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dev_err(&gm12u320->udev->dev, "Misc. value error %d\n", ret);
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return -EIO;
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}
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/* cmd_buf[0] now contains the read value, which we don't use */
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/* Read status */
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ret = usb_bulk_msg(gm12u320->udev,
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usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
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gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
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CMD_TIMEOUT);
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if (ret || len != READ_STATUS_SIZE) {
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dev_err(&gm12u320->udev->dev, "Misc. status error %d\n", ret);
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return -EIO;
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}
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return 0;
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}
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static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
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{
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while (len--) {
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*dst++ = *src++;
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*dst++ = *src++;
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*dst++ = *src++;
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src++;
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}
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}
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static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
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{
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int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
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struct drm_framebuffer *fb;
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void *vaddr;
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u8 *src;
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mutex_lock(&gm12u320->fb_update.lock);
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if (!gm12u320->fb_update.fb)
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goto unlock;
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fb = gm12u320->fb_update.fb;
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x1 = gm12u320->fb_update.rect.x1;
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x2 = gm12u320->fb_update.rect.x2;
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y1 = gm12u320->fb_update.rect.y1;
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y2 = gm12u320->fb_update.rect.y2;
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vaddr = drm_gem_shmem_vmap(fb->obj[0]);
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if (IS_ERR(vaddr)) {
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DRM_ERROR("failed to vmap fb: %ld\n", PTR_ERR(vaddr));
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goto put_fb;
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}
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if (fb->obj[0]->import_attach) {
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ret = dma_buf_begin_cpu_access(
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fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
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if (ret) {
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DRM_ERROR("dma_buf_begin_cpu_access err: %d\n", ret);
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goto vunmap;
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}
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}
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src = vaddr + y1 * fb->pitches[0] + x1 * 4;
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x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
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x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
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for (; y1 < y2; y1++) {
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remain = 0;
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len = (x2 - x1) * 3;
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dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;
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block = dst_offset / DATA_BLOCK_CONTENT_SIZE;
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dst_offset %= DATA_BLOCK_CONTENT_SIZE;
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if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {
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remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;
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len = DATA_BLOCK_CONTENT_SIZE - dst_offset;
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}
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dst_offset += DATA_BLOCK_HEADER_SIZE;
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len /= 3;
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gm12u320_32bpp_to_24bpp_packed(
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gm12u320->data_buf[block] + dst_offset,
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src, len);
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if (remain) {
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block++;
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dst_offset = DATA_BLOCK_HEADER_SIZE;
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gm12u320_32bpp_to_24bpp_packed(
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gm12u320->data_buf[block] + dst_offset,
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src + len * 4, remain / 3);
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}
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src += fb->pitches[0];
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}
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if (fb->obj[0]->import_attach) {
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ret = dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf,
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DMA_FROM_DEVICE);
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if (ret)
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DRM_ERROR("dma_buf_end_cpu_access err: %d\n", ret);
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}
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vunmap:
|
||||
drm_gem_shmem_vunmap(fb->obj[0], vaddr);
|
||||
put_fb:
|
||||
drm_framebuffer_put(fb);
|
||||
gm12u320->fb_update.fb = NULL;
|
||||
unlock:
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
}
|
||||
|
||||
static int gm12u320_fb_update_ready(struct gm12u320_device *gm12u320)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&gm12u320->fb_update.lock);
|
||||
ret = !gm12u320->fb_update.run || gm12u320->fb_update.fb != NULL;
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void gm12u320_fb_update_work(struct work_struct *work)
|
||||
{
|
||||
struct gm12u320_device *gm12u320 =
|
||||
container_of(work, struct gm12u320_device, fb_update.work);
|
||||
int draw_status_timeout = FIRST_FRAME_TIMEOUT;
|
||||
int block, block_size, len;
|
||||
int frame = 0;
|
||||
int ret = 0;
|
||||
|
||||
while (gm12u320->fb_update.run) {
|
||||
gm12u320_copy_fb_to_blocks(gm12u320);
|
||||
|
||||
for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {
|
||||
if (block == GM12U320_BLOCK_COUNT - 1)
|
||||
block_size = DATA_LAST_BLOCK_SIZE;
|
||||
else
|
||||
block_size = DATA_BLOCK_SIZE;
|
||||
|
||||
/* Send data command to device */
|
||||
memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);
|
||||
gm12u320->cmd_buf[8] = block_size & 0xff;
|
||||
gm12u320->cmd_buf[9] = block_size >> 8;
|
||||
gm12u320->cmd_buf[20] = 0xfc - block * 4;
|
||||
gm12u320->cmd_buf[21] = block | (frame << 7);
|
||||
|
||||
ret = usb_bulk_msg(gm12u320->udev,
|
||||
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
|
||||
gm12u320->cmd_buf, CMD_SIZE, &len,
|
||||
CMD_TIMEOUT);
|
||||
if (ret || len != CMD_SIZE)
|
||||
goto err;
|
||||
|
||||
/* Send data block to device */
|
||||
ret = usb_bulk_msg(gm12u320->udev,
|
||||
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
|
||||
gm12u320->data_buf[block], block_size,
|
||||
&len, DATA_TIMEOUT);
|
||||
if (ret || len != block_size)
|
||||
goto err;
|
||||
|
||||
/* Read status */
|
||||
ret = usb_bulk_msg(gm12u320->udev,
|
||||
usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
|
||||
gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
|
||||
CMD_TIMEOUT);
|
||||
if (ret || len != READ_STATUS_SIZE)
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* Send draw command to device */
|
||||
memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);
|
||||
ret = usb_bulk_msg(gm12u320->udev,
|
||||
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
|
||||
gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
|
||||
if (ret || len != CMD_SIZE)
|
||||
goto err;
|
||||
|
||||
/* Read status */
|
||||
ret = usb_bulk_msg(gm12u320->udev,
|
||||
usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
|
||||
gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
|
||||
draw_status_timeout);
|
||||
if (ret || len != READ_STATUS_SIZE)
|
||||
goto err;
|
||||
|
||||
draw_status_timeout = CMD_TIMEOUT;
|
||||
frame = !frame;
|
||||
|
||||
/*
|
||||
* We must draw a frame every 2s otherwise the projector
|
||||
* switches back to showing its logo.
|
||||
*/
|
||||
wait_event_timeout(gm12u320->fb_update.waitq,
|
||||
gm12u320_fb_update_ready(gm12u320),
|
||||
IDLE_TIMEOUT);
|
||||
}
|
||||
return;
|
||||
err:
|
||||
/* Do not log errors caused by module unload or device unplug */
|
||||
if (ret != -ECONNRESET && ret != -ESHUTDOWN)
|
||||
dev_err(&gm12u320->udev->dev, "Frame update error: %d\n", ret);
|
||||
}
|
||||
|
||||
static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
|
||||
struct drm_rect *dirty)
|
||||
{
|
||||
struct gm12u320_device *gm12u320 = fb->dev->dev_private;
|
||||
struct drm_framebuffer *old_fb = NULL;
|
||||
bool wakeup = false;
|
||||
|
||||
mutex_lock(&gm12u320->fb_update.lock);
|
||||
|
||||
if (gm12u320->fb_update.fb != fb) {
|
||||
old_fb = gm12u320->fb_update.fb;
|
||||
drm_framebuffer_get(fb);
|
||||
gm12u320->fb_update.fb = fb;
|
||||
gm12u320->fb_update.rect = *dirty;
|
||||
wakeup = true;
|
||||
} else {
|
||||
struct drm_rect *rect = &gm12u320->fb_update.rect;
|
||||
|
||||
rect->x1 = min(rect->x1, dirty->x1);
|
||||
rect->y1 = min(rect->y1, dirty->y1);
|
||||
rect->x2 = max(rect->x2, dirty->x2);
|
||||
rect->y2 = max(rect->y2, dirty->y2);
|
||||
}
|
||||
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
|
||||
if (wakeup)
|
||||
wake_up(&gm12u320->fb_update.waitq);
|
||||
|
||||
if (old_fb)
|
||||
drm_framebuffer_put(old_fb);
|
||||
}
|
||||
|
||||
static void gm12u320_start_fb_update(struct gm12u320_device *gm12u320)
|
||||
{
|
||||
mutex_lock(&gm12u320->fb_update.lock);
|
||||
gm12u320->fb_update.run = true;
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
|
||||
queue_work(gm12u320->fb_update.workq, &gm12u320->fb_update.work);
|
||||
}
|
||||
|
||||
static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
|
||||
{
|
||||
mutex_lock(&gm12u320->fb_update.lock);
|
||||
gm12u320->fb_update.run = false;
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
|
||||
wake_up(&gm12u320->fb_update.waitq);
|
||||
cancel_work_sync(&gm12u320->fb_update.work);
|
||||
|
||||
mutex_lock(&gm12u320->fb_update.lock);
|
||||
if (gm12u320->fb_update.fb) {
|
||||
drm_framebuffer_put(gm12u320->fb_update.fb);
|
||||
gm12u320->fb_update.fb = NULL;
|
||||
}
|
||||
mutex_unlock(&gm12u320->fb_update.lock);
|
||||
}
|
||||
|
||||
static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320)
|
||||
{
|
||||
return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A,
|
||||
MISC_REQ_GET_SET_ECO_B, 0x01 /* set */,
|
||||
eco_mode ? 0x01 : 0x00, 0x00, 0x01);
|
||||
}
|
||||
|
||||
/* ------------------------------------------------------------------ */
|
||||
/* gm12u320 connector */
|
||||
|
||||
/*
|
||||
* We use fake EDID info so that userspace know that it is dealing with
|
||||
* an Acer projector, rather then listing this as an "unknown" monitor.
|
||||
* Note this assumes this driver is only ever used with the Acer C120, if we
|
||||
* add support for other devices the vendor and model should be parameterized.
|
||||
*/
|
||||
static struct edid gm12u320_edid = {
|
||||
.header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 },
|
||||
.mfg_id = { 0x04, 0x72 }, /* "ACR" */
|
||||
.prod_code = { 0x20, 0xc1 }, /* C120h */
|
||||
.serial = 0xaa55aa55,
|
||||
.mfg_week = 1,
|
||||
.mfg_year = 16,
|
||||
.version = 1, /* EDID 1.3 */
|
||||
.revision = 3, /* EDID 1.3 */
|
||||
.input = 0x08, /* Analog input */
|
||||
.features = 0x0a, /* Pref timing in DTD 1 */
|
||||
.standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
|
||||
{ 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } },
|
||||
.detailed_timings = { {
|
||||
.pixel_clock = 3383,
|
||||
/* hactive = 848, hblank = 256 */
|
||||
.data.pixel_data.hactive_lo = 0x50,
|
||||
.data.pixel_data.hblank_lo = 0x00,
|
||||
.data.pixel_data.hactive_hblank_hi = 0x31,
|
||||
/* vactive = 480, vblank = 28 */
|
||||
.data.pixel_data.vactive_lo = 0xe0,
|
||||
.data.pixel_data.vblank_lo = 0x1c,
|
||||
.data.pixel_data.vactive_vblank_hi = 0x10,
|
||||
/* hsync offset 40 pw 128, vsync offset 1 pw 4 */
|
||||
.data.pixel_data.hsync_offset_lo = 0x28,
|
||||
.data.pixel_data.hsync_pulse_width_lo = 0x80,
|
||||
.data.pixel_data.vsync_offset_pulse_width_lo = 0x14,
|
||||
.data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00,
|
||||
/* Digital separate syncs, hsync+, vsync+ */
|
||||
.data.pixel_data.misc = 0x1e,
|
||||
}, {
|
||||
.pixel_clock = 0,
|
||||
.data.other_data.type = 0xfd, /* Monitor ranges */
|
||||
.data.other_data.data.range.min_vfreq = 59,
|
||||
.data.other_data.data.range.max_vfreq = 61,
|
||||
.data.other_data.data.range.min_hfreq_khz = 29,
|
||||
.data.other_data.data.range.max_hfreq_khz = 32,
|
||||
.data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */
|
||||
.data.other_data.data.range.flags = 0,
|
||||
.data.other_data.data.range.formula.cvt = {
|
||||
0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 },
|
||||
}, {
|
||||
.pixel_clock = 0,
|
||||
.data.other_data.type = 0xfc, /* Model string */
|
||||
.data.other_data.data.str.str = {
|
||||
'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n',
|
||||
' ', ' ', ' ' },
|
||||
}, {
|
||||
.pixel_clock = 0,
|
||||
.data.other_data.type = 0xfe, /* Unspecified text / padding */
|
||||
.data.other_data.data.str.str = {
|
||||
'\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
|
||||
' ', ' ', ' ' },
|
||||
} },
|
||||
.checksum = 0x13,
|
||||
};
|
||||
|
||||
static int gm12u320_conn_get_modes(struct drm_connector *connector)
|
||||
{
|
||||
drm_connector_update_edid_property(connector, &gm12u320_edid);
|
||||
return drm_add_edid_modes(connector, &gm12u320_edid);
|
||||
}
|
||||
|
||||
static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = {
|
||||
.get_modes = gm12u320_conn_get_modes,
|
||||
};
|
||||
|
||||
static const struct drm_connector_funcs gm12u320_conn_funcs = {
|
||||
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||
.destroy = drm_connector_cleanup,
|
||||
.reset = drm_atomic_helper_connector_reset,
|
||||
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
||||
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
||||
};
|
||||
|
||||
static int gm12u320_conn_init(struct gm12u320_device *gm12u320)
|
||||
{
|
||||
drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs);
|
||||
return drm_connector_init(&gm12u320->dev, &gm12u320->conn,
|
||||
&gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA);
|
||||
}
|
||||
|
||||
/* ------------------------------------------------------------------ */
|
||||
/* gm12u320 (simple) display pipe */
|
||||
|
||||
static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_crtc_state *crtc_state,
|
||||
struct drm_plane_state *plane_state)
|
||||
{
|
||||
struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
|
||||
struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
|
||||
|
||||
gm12u320_fb_mark_dirty(plane_state->fb, &rect);
|
||||
gm12u320_start_fb_update(gm12u320);
|
||||
gm12u320->pipe_enabled = true;
|
||||
}
|
||||
|
||||
static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
|
||||
{
|
||||
struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
|
||||
|
||||
gm12u320_stop_fb_update(gm12u320);
|
||||
gm12u320->pipe_enabled = false;
|
||||
}
|
||||
|
||||
static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_plane_state *old_state)
|
||||
{
|
||||
struct drm_plane_state *state = pipe->plane.state;
|
||||
struct drm_crtc *crtc = &pipe->crtc;
|
||||
struct drm_rect rect;
|
||||
|
||||
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
|
||||
gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
|
||||
|
||||
if (crtc->state->event) {
|
||||
spin_lock_irq(&crtc->dev->event_lock);
|
||||
drm_crtc_send_vblank_event(crtc, crtc->state->event);
|
||||
crtc->state->event = NULL;
|
||||
spin_unlock_irq(&crtc->dev->event_lock);
|
||||
}
|
||||
}
|
||||
|
||||
static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
|
||||
.enable = gm12u320_pipe_enable,
|
||||
.disable = gm12u320_pipe_disable,
|
||||
.update = gm12u320_pipe_update,
|
||||
};
|
||||
|
||||
static const uint32_t gm12u320_pipe_formats[] = {
|
||||
DRM_FORMAT_XRGB8888,
|
||||
};
|
||||
|
||||
static const uint64_t gm12u320_pipe_modifiers[] = {
|
||||
DRM_FORMAT_MOD_LINEAR,
|
||||
DRM_FORMAT_MOD_INVALID
|
||||
};
|
||||
|
||||
static void gm12u320_driver_release(struct drm_device *dev)
|
||||
{
|
||||
struct gm12u320_device *gm12u320 = dev->dev_private;
|
||||
|
||||
gm12u320_usb_free(gm12u320);
|
||||
drm_mode_config_cleanup(dev);
|
||||
drm_dev_fini(dev);
|
||||
kfree(gm12u320);
|
||||
}
|
||||
|
||||
DEFINE_DRM_GEM_SHMEM_FOPS(gm12u320_fops);
|
||||
|
||||
static struct drm_driver gm12u320_drm_driver = {
|
||||
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
|
||||
|
||||
.name = DRIVER_NAME,
|
||||
.desc = DRIVER_DESC,
|
||||
.date = DRIVER_DATE,
|
||||
.major = DRIVER_MAJOR,
|
||||
.minor = DRIVER_MINOR,
|
||||
|
||||
.release = gm12u320_driver_release,
|
||||
.fops = &gm12u320_fops,
|
||||
DRM_GEM_SHMEM_DRIVER_OPS,
|
||||
};
|
||||
|
||||
static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = {
|
||||
.fb_create = drm_gem_fb_create_with_dirty,
|
||||
.atomic_check = drm_atomic_helper_check,
|
||||
.atomic_commit = drm_atomic_helper_commit,
|
||||
};
|
||||
|
||||
static int gm12u320_usb_probe(struct usb_interface *interface,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct gm12u320_device *gm12u320;
|
||||
struct drm_device *dev;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* The gm12u320 presents itself to the system as 2 usb mass-storage
|
||||
* interfaces, we only care about / need the first one.
|
||||
*/
|
||||
if (interface->cur_altsetting->desc.bInterfaceNumber != 0)
|
||||
return -ENODEV;
|
||||
|
||||
gm12u320 = kzalloc(sizeof(*gm12u320), GFP_KERNEL);
|
||||
if (gm12u320 == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
gm12u320->udev = interface_to_usbdev(interface);
|
||||
INIT_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);
|
||||
mutex_init(&gm12u320->fb_update.lock);
|
||||
init_waitqueue_head(&gm12u320->fb_update.waitq);
|
||||
|
||||
dev = &gm12u320->dev;
|
||||
ret = drm_dev_init(dev, &gm12u320_drm_driver, &interface->dev);
|
||||
if (ret) {
|
||||
kfree(gm12u320);
|
||||
return ret;
|
||||
}
|
||||
dev->dev_private = gm12u320;
|
||||
|
||||
drm_mode_config_init(dev);
|
||||
dev->mode_config.min_width = GM12U320_USER_WIDTH;
|
||||
dev->mode_config.max_width = GM12U320_USER_WIDTH;
|
||||
dev->mode_config.min_height = GM12U320_HEIGHT;
|
||||
dev->mode_config.max_height = GM12U320_HEIGHT;
|
||||
dev->mode_config.funcs = &gm12u320_mode_config_funcs;
|
||||
|
||||
ret = gm12u320_usb_alloc(gm12u320);
|
||||
if (ret)
|
||||
goto err_put;
|
||||
|
||||
ret = gm12u320_set_ecomode(gm12u320);
|
||||
if (ret)
|
||||
goto err_put;
|
||||
|
||||
ret = gm12u320_conn_init(gm12u320);
|
||||
if (ret)
|
||||
goto err_put;
|
||||
|
||||
ret = drm_simple_display_pipe_init(&gm12u320->dev,
|
||||
&gm12u320->pipe,
|
||||
&gm12u320_pipe_funcs,
|
||||
gm12u320_pipe_formats,
|
||||
ARRAY_SIZE(gm12u320_pipe_formats),
|
||||
gm12u320_pipe_modifiers,
|
||||
&gm12u320->conn);
|
||||
if (ret)
|
||||
goto err_put;
|
||||
|
||||
drm_mode_config_reset(dev);
|
||||
|
||||
usb_set_intfdata(interface, dev);
|
||||
ret = drm_dev_register(dev, 0);
|
||||
if (ret)
|
||||
goto err_put;
|
||||
|
||||
drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);
|
||||
|
||||
return 0;
|
||||
|
||||
err_put:
|
||||
drm_dev_put(dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void gm12u320_usb_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
struct drm_device *dev = usb_get_intfdata(interface);
|
||||
struct gm12u320_device *gm12u320 = dev->dev_private;
|
||||
|
||||
gm12u320_stop_fb_update(gm12u320);
|
||||
drm_dev_unplug(dev);
|
||||
drm_dev_put(dev);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int gm12u320_suspend(struct usb_interface *interface,
|
||||
pm_message_t message)
|
||||
{
|
||||
struct drm_device *dev = usb_get_intfdata(interface);
|
||||
struct gm12u320_device *gm12u320 = dev->dev_private;
|
||||
|
||||
if (gm12u320->pipe_enabled)
|
||||
gm12u320_stop_fb_update(gm12u320);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gm12u320_resume(struct usb_interface *interface)
|
||||
{
|
||||
struct drm_device *dev = usb_get_intfdata(interface);
|
||||
struct gm12u320_device *gm12u320 = dev->dev_private;
|
||||
|
||||
gm12u320_set_ecomode(gm12u320);
|
||||
if (gm12u320->pipe_enabled)
|
||||
gm12u320_start_fb_update(gm12u320);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static const struct usb_device_id id_table[] = {
|
||||
{ USB_DEVICE(0x1de1, 0xc102) },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(usb, id_table);
|
||||
|
||||
static struct usb_driver gm12u320_usb_driver = {
|
||||
.name = "gm12u320",
|
||||
.probe = gm12u320_usb_probe,
|
||||
.disconnect = gm12u320_usb_disconnect,
|
||||
.id_table = id_table,
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = gm12u320_suspend,
|
||||
.resume = gm12u320_resume,
|
||||
.reset_resume = gm12u320_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
module_usb_driver(gm12u320_usb_driver);
|
||||
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue