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linux_dsm_epyc7002/drivers/gpu/drm/panel/panel-elida-kd35t133.c
Ville Syrjälä 0425662fdf drm: Nuke mode->vrefresh 
Get rid of mode->vrefresh and just calculate it on demand. Saves
a bit of space and avoids the cached value getting out of sync
with reality.

Mostly done with cocci, with the following manual fixups:
- Remove the now empty loop in drm_helper_probe_single_connector_modes()
- Fix __MODE() macro in ch7006_mode.c
- Fix DRM_MODE_ARG() macro in drm_modes.h
- Remove leftover comment from samsung_s6d16d0_mode
- Drop the TODO

@@
@@
struct drm_display_mode {
	...
-	int vrefresh;
	...
};

@@
identifier N;
expression E;
@@
struct drm_display_mode N = {
-	.vrefresh = E
};

@@
identifier N;
expression E;
@@
struct drm_display_mode N[...] = {
...,
{
-	.vrefresh = E
}
,...
};

@@
expression E;
@@
{
	DRM_MODE(...),
-	.vrefresh = E,
}

@@
identifier M, R;
@@
int drm_mode_vrefresh(const struct drm_display_mode *M)
{
  ...
- if (M->vrefresh > 0)
- 	R = M->vrefresh;
- else
  if (...) {
  ...
  }
  ...
}

@@
struct drm_display_mode *p;
expression E;
@@
(
- p->vrefresh = E;
|
- p->vrefresh
+ drm_mode_vrefresh(p)
)

@@
struct drm_display_mode s;
expression E;
@@
(
- s.vrefresh = E;
|
- s.vrefresh
+ drm_mode_vrefresh(&s)
)

@@
expression E;
@@
- drm_mode_vrefresh(E) ? drm_mode_vrefresh(E) : drm_mode_vrefresh(E)
+ drm_mode_vrefresh(E)

@find_substruct@
identifier X;
identifier S;
@@
struct X {
...
	struct drm_display_mode S;
...
};

@@
identifier find_substruct.S;
expression E;
identifier I;
@@
{
.S = {
-	.vrefresh = E
}
}

@@
identifier find_substruct.S;
identifier find_substruct.X;
expression E;
identifier I;
@@
struct X I[...] = {
...,
.S = {
-	.vrefresh = E
}
,...
};

v2: Drop TODO
v3: Rebase
v4: Rebase

Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jerry Han <hanxu5@huaqin.corp-partner.google.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Stefan Mavrodiev <stefan@olimex.com>
Cc: Robert Chiras <robert.chiras@nxp.com>
Cc: "Guido Günther" <agx@sigxcpu.org>
Cc: Purism Kernel Team <kernel@puri.sm>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: linux-amlogic@lists.infradead.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200428171940.19552-4-ville.syrjala@linux.intel.com
2020-05-27 14:31:42 +03:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Elida kd35t133 5.5" MIPI-DSI panel driver
* Copyright (C) 2020 Theobroma Systems Design und Consulting GmbH
*
* based on
*
* Rockteck jh057n00900 5.5" MIPI-DSI panel driver
* Copyright (C) Purism SPC 2019
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <video/display_timing.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
/* Manufacturer specific Commands send via DSI */
#define KD35T133_CMD_INTERFACEMODECTRL 0xb0
#define KD35T133_CMD_FRAMERATECTRL 0xb1
#define KD35T133_CMD_DISPLAYINVERSIONCTRL 0xb4
#define KD35T133_CMD_DISPLAYFUNCTIONCTRL 0xb6
#define KD35T133_CMD_POWERCONTROL1 0xc0
#define KD35T133_CMD_POWERCONTROL2 0xc1
#define KD35T133_CMD_VCOMCONTROL 0xc5
#define KD35T133_CMD_POSITIVEGAMMA 0xe0
#define KD35T133_CMD_NEGATIVEGAMMA 0xe1
#define KD35T133_CMD_SETIMAGEFUNCTION 0xe9
#define KD35T133_CMD_ADJUSTCONTROL3 0xf7
struct kd35t133 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vdd;
struct regulator *iovcc;
bool prepared;
};
static inline struct kd35t133 *panel_to_kd35t133(struct drm_panel *panel)
{
return container_of(panel, struct kd35t133, panel);
}
#define dsi_dcs_write_seq(dsi, cmd, seq...) do { \
static const u8 d[] = { seq }; \
int ret; \
ret = mipi_dsi_dcs_write(dsi, cmd, d, ARRAY_SIZE(d)); \
if (ret < 0) \
return ret; \
} while (0)
static int kd35t133_init_sequence(struct kd35t133 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
struct device *dev = ctx->dev;
/*
* Init sequence was supplied by the panel vendor with minimal
* documentation.
*/
dsi_dcs_write_seq(dsi, KD35T133_CMD_POSITIVEGAMMA,
0x00, 0x13, 0x18, 0x04, 0x0f, 0x06, 0x3a, 0x56,
0x4d, 0x03, 0x0a, 0x06, 0x30, 0x3e, 0x0f);
dsi_dcs_write_seq(dsi, KD35T133_CMD_NEGATIVEGAMMA,
0x00, 0x13, 0x18, 0x01, 0x11, 0x06, 0x38, 0x34,
0x4d, 0x06, 0x0d, 0x0b, 0x31, 0x37, 0x0f);
dsi_dcs_write_seq(dsi, KD35T133_CMD_POWERCONTROL1, 0x18, 0x17);
dsi_dcs_write_seq(dsi, KD35T133_CMD_POWERCONTROL2, 0x41);
dsi_dcs_write_seq(dsi, KD35T133_CMD_VCOMCONTROL, 0x00, 0x1a, 0x80);
dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x48);
dsi_dcs_write_seq(dsi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
dsi_dcs_write_seq(dsi, KD35T133_CMD_INTERFACEMODECTRL, 0x00);
dsi_dcs_write_seq(dsi, KD35T133_CMD_FRAMERATECTRL, 0xa0);
dsi_dcs_write_seq(dsi, KD35T133_CMD_DISPLAYINVERSIONCTRL, 0x02);
dsi_dcs_write_seq(dsi, KD35T133_CMD_DISPLAYFUNCTIONCTRL,
0x20, 0x02);
dsi_dcs_write_seq(dsi, KD35T133_CMD_SETIMAGEFUNCTION, 0x00);
dsi_dcs_write_seq(dsi, KD35T133_CMD_ADJUSTCONTROL3,
0xa9, 0x51, 0x2c, 0x82);
mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_INVERT_MODE, NULL, 0);
DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n");
return 0;
}
static int kd35t133_unprepare(struct drm_panel *panel)
{
struct kd35t133 *ctx = panel_to_kd35t133(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (!ctx->prepared)
return 0;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
DRM_DEV_ERROR(ctx->dev, "failed to set display off: %d\n",
ret);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "failed to enter sleep mode: %d\n",
ret);
return ret;
}
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vdd);
ctx->prepared = false;
return 0;
}
static int kd35t133_prepare(struct drm_panel *panel)
{
struct kd35t133 *ctx = panel_to_kd35t133(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (ctx->prepared)
return 0;
DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n");
ret = regulator_enable(ctx->vdd);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev,
"Failed to enable vdd supply: %d\n", ret);
return ret;
}
ret = regulator_enable(ctx->iovcc);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev,
"Failed to enable iovcc supply: %d\n", ret);
goto disable_vdd;
}
msleep(20);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(10, 20);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(20);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
goto disable_iovcc;
}
msleep(250);
ret = kd35t133_init_sequence(ctx);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n",
ret);
goto disable_iovcc;
}
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Failed to set display on: %d\n", ret);
goto disable_iovcc;
}
msleep(50);
ctx->prepared = true;
return 0;
disable_iovcc:
regulator_disable(ctx->iovcc);
disable_vdd:
regulator_disable(ctx->vdd);
return ret;
}
static const struct drm_display_mode default_mode = {
.hdisplay = 320,
.hsync_start = 320 + 130,
.hsync_end = 320 + 130 + 4,
.htotal = 320 + 130 + 4 + 130,
.vdisplay = 480,
.vsync_start = 480 + 2,
.vsync_end = 480 + 2 + 1,
.vtotal = 480 + 2 + 1 + 2,
.clock = 17000,
.width_mm = 42,
.height_mm = 82,
};
static int kd35t133_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct kd35t133 *ctx = panel_to_kd35t133(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
DRM_DEV_ERROR(ctx->dev, "Failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
drm_mode_vrefresh(&default_mode));
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs kd35t133_funcs = {
.unprepare = kd35t133_unprepare,
.prepare = kd35t133_prepare,
.get_modes = kd35t133_get_modes,
};
static int kd35t133_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct kd35t133 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
DRM_DEV_ERROR(dev, "cannot get reset gpio\n");
return PTR_ERR(ctx->reset_gpio);
}
ctx->vdd = devm_regulator_get(dev, "vdd");
if (IS_ERR(ctx->vdd)) {
ret = PTR_ERR(ctx->vdd);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to request vdd regulator: %d\n",
ret);
return ret;
}
ctx->iovcc = devm_regulator_get(dev, "iovcc");
if (IS_ERR(ctx->iovcc)) {
ret = PTR_ERR(ctx->iovcc);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to request iovcc regulator: %d\n",
ret);
return ret;
}
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 1;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;
drm_panel_init(&ctx->panel, &dsi->dev, &kd35t133_funcs,
DRM_MODE_CONNECTOR_DSI);
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "mipi_dsi_attach failed: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void kd35t133_shutdown(struct mipi_dsi_device *dsi)
{
struct kd35t133 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = drm_panel_unprepare(&ctx->panel);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n",
ret);
ret = drm_panel_disable(&ctx->panel);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n",
ret);
}
static int kd35t133_remove(struct mipi_dsi_device *dsi)
{
struct kd35t133 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
kd35t133_shutdown(dsi);
ret = mipi_dsi_detach(dsi);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to detach from DSI host: %d\n",
ret);
drm_panel_remove(&ctx->panel);
return 0;
}
static const struct of_device_id kd35t133_of_match[] = {
{ .compatible = "elida,kd35t133" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, kd35t133_of_match);
static struct mipi_dsi_driver kd35t133_driver = {
.driver = {
.name = "panel-elida-kd35t133",
.of_match_table = kd35t133_of_match,
},
.probe = kd35t133_probe,
.remove = kd35t133_remove,
.shutdown = kd35t133_shutdown,
};
module_mipi_dsi_driver(kd35t133_driver);
MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
MODULE_DESCRIPTION("DRM driver for Elida kd35t133 MIPI DSI panel");
MODULE_LICENSE("GPL v2");
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