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path: root/drivers/gpu/drm/tinydrm/mipi-dbi.c
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Diffstat (limited to 'drivers/gpu/drm/tinydrm/mipi-dbi.c')
-rw-r--r--drivers/gpu/drm/tinydrm/mipi-dbi.c153
1 files changed, 78 insertions, 75 deletions
diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index 37a73b4c0f85..93b9b3ac5568 100644
--- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
+++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
@@ -100,17 +100,17 @@ static const u8 mipi_dbi_dcs_read_commands[] = {
0, /* sentinel */
};
-static bool mipi_dbi_command_is_read(struct mipi_dbi *mipi, u8 cmd)
+static bool mipi_dbi_command_is_read(struct mipi_dbi *dbi, u8 cmd)
{
unsigned int i;
- if (!mipi->read_commands)
+ if (!dbi->read_commands)
return false;
for (i = 0; i < 0xff; i++) {
- if (!mipi->read_commands[i])
+ if (!dbi->read_commands[i])
return false;
- if (cmd == mipi->read_commands[i])
+ if (cmd == dbi->read_commands[i])
return true;
}
@@ -119,7 +119,7 @@ static bool mipi_dbi_command_is_read(struct mipi_dbi *mipi, u8 cmd)
/**
* mipi_dbi_command_read - MIPI DCS read command
- * @mipi: MIPI structure
+ * @dbi: MIPI DBI structure
* @cmd: Command
* @val: Value read
*
@@ -128,21 +128,21 @@ static bool mipi_dbi_command_is_read(struct mipi_dbi *mipi, u8 cmd)
* Returns:
* Zero on success, negative error code on failure.
*/
-int mipi_dbi_command_read(struct mipi_dbi *mipi, u8 cmd, u8 *val)
+int mipi_dbi_command_read(struct mipi_dbi *dbi, u8 cmd, u8 *val)
{
- if (!mipi->read_commands)
+ if (!dbi->read_commands)
return -EACCES;
- if (!mipi_dbi_command_is_read(mipi, cmd))
+ if (!mipi_dbi_command_is_read(dbi, cmd))
return -EINVAL;
- return mipi_dbi_command_buf(mipi, cmd, val, 1);
+ return mipi_dbi_command_buf(dbi, cmd, val, 1);
}
EXPORT_SYMBOL(mipi_dbi_command_read);
/**
* mipi_dbi_command_buf - MIPI DCS command with parameter(s) in an array
- * @mipi: MIPI structure
+ * @dbi: MIPI DBI structure
* @cmd: Command
* @data: Parameter buffer
* @len: Buffer length
@@ -150,7 +150,7 @@ EXPORT_SYMBOL(mipi_dbi_command_read);
* Returns:
* Zero on success, negative error code on failure.
*/
-int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len)
+int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len)
{
u8 *cmdbuf;
int ret;
@@ -160,9 +160,9 @@ int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len)
if (!cmdbuf)
return -ENOMEM;
- mutex_lock(&mipi->cmdlock);
- ret = mipi->command(mipi, cmdbuf, data, len);
- mutex_unlock(&mipi->cmdlock);
+ mutex_lock(&dbi->cmdlock);
+ ret = dbi->command(dbi, cmdbuf, data, len);
+ mutex_unlock(&dbi->cmdlock);
kfree(cmdbuf);
@@ -171,7 +171,7 @@ int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len)
EXPORT_SYMBOL(mipi_dbi_command_buf);
/* This should only be used by mipi_dbi_command() */
-int mipi_dbi_command_stackbuf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len)
+int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len)
{
u8 *buf;
int ret;
@@ -180,7 +180,7 @@ int mipi_dbi_command_stackbuf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t le
if (!buf)
return -ENOMEM;
- ret = mipi_dbi_command_buf(mipi, cmd, buf, len);
+ ret = mipi_dbi_command_buf(dbi, cmd, buf, len);
kfree(buf);
@@ -244,7 +244,8 @@ static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
struct mipi_dbi *mipi = drm_to_mipi_dbi(fb->dev);
unsigned int height = rect->y2 - rect->y1;
unsigned int width = rect->x2 - rect->x1;
- bool swap = mipi->swap_bytes;
+ struct mipi_dbi *dbi = mipi;
+ bool swap = dbi->swap_bytes;
int idx, ret = 0;
bool full;
void *tr;
@@ -259,7 +260,7 @@ static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
- if (!mipi->dc || !full || swap ||
+ if (!dbi->dc || !full || swap ||
fb->format->format == DRM_FORMAT_XRGB8888) {
tr = mipi->tx_buf;
ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, rect, swap);
@@ -269,14 +270,14 @@ static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
tr = cma_obj->vaddr;
}
- mipi_dbi_command(mipi, MIPI_DCS_SET_COLUMN_ADDRESS,
+ mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
(rect->x1 >> 8) & 0xff, rect->x1 & 0xff,
((rect->x2 - 1) >> 8) & 0xff, (rect->x2 - 1) & 0xff);
- mipi_dbi_command(mipi, MIPI_DCS_SET_PAGE_ADDRESS,
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
(rect->y1 >> 8) & 0xff, rect->y1 & 0xff,
((rect->y2 - 1) >> 8) & 0xff, (rect->y2 - 1) & 0xff);
- ret = mipi_dbi_command_buf(mipi, MIPI_DCS_WRITE_MEMORY_START, tr,
+ ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START, tr,
width * height * 2);
err_msg:
if (ret)
@@ -356,6 +357,7 @@ static void mipi_dbi_blank(struct mipi_dbi *mipi)
u16 height = drm->mode_config.min_height;
u16 width = drm->mode_config.min_width;
size_t len = width * height * 2;
+ struct mipi_dbi *dbi = mipi;
int idx;
if (!drm_dev_enter(drm, &idx))
@@ -363,11 +365,11 @@ static void mipi_dbi_blank(struct mipi_dbi *mipi)
memset(mipi->tx_buf, 0, len);
- mipi_dbi_command(mipi, MIPI_DCS_SET_COLUMN_ADDRESS, 0, 0,
+ mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, 0, 0,
(width >> 8) & 0xFF, (width - 1) & 0xFF);
- mipi_dbi_command(mipi, MIPI_DCS_SET_PAGE_ADDRESS, 0, 0,
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS, 0, 0,
(height >> 8) & 0xFF, (height - 1) & 0xFF);
- mipi_dbi_command_buf(mipi, MIPI_DCS_WRITE_MEMORY_START,
+ mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START,
(u8 *)mipi->tx_buf, len);
drm_dev_exit(idx);
@@ -596,25 +598,25 @@ EXPORT_SYMBOL(mipi_dbi_release);
/**
* mipi_dbi_hw_reset - Hardware reset of controller
- * @mipi: MIPI DBI structure
+ * @dbi: MIPI DBI structure
*
* Reset controller if the &mipi_dbi->reset gpio is set.
*/
-void mipi_dbi_hw_reset(struct mipi_dbi *mipi)
+void mipi_dbi_hw_reset(struct mipi_dbi *dbi)
{
- if (!mipi->reset)
+ if (!dbi->reset)
return;
- gpiod_set_value_cansleep(mipi->reset, 0);
+ gpiod_set_value_cansleep(dbi->reset, 0);
usleep_range(20, 1000);
- gpiod_set_value_cansleep(mipi->reset, 1);
+ gpiod_set_value_cansleep(dbi->reset, 1);
msleep(120);
}
EXPORT_SYMBOL(mipi_dbi_hw_reset);
/**
* mipi_dbi_display_is_on - Check if display is on
- * @mipi: MIPI DBI structure
+ * @dbi: MIPI DBI structure
*
* This function checks the Power Mode register (if readable) to see if
* display output is turned on. This can be used to see if the bootloader
@@ -624,11 +626,11 @@ EXPORT_SYMBOL(mipi_dbi_hw_reset);
* Returns:
* true if the display can be verified to be on, false otherwise.
*/
-bool mipi_dbi_display_is_on(struct mipi_dbi *mipi)
+bool mipi_dbi_display_is_on(struct mipi_dbi *dbi)
{
u8 val;
- if (mipi_dbi_command_read(mipi, MIPI_DCS_GET_POWER_MODE, &val))
+ if (mipi_dbi_command_read(dbi, MIPI_DCS_GET_POWER_MODE, &val))
return false;
val &= ~DCS_POWER_MODE_RESERVED_MASK;
@@ -647,6 +649,7 @@ EXPORT_SYMBOL(mipi_dbi_display_is_on);
static int mipi_dbi_poweron_reset_conditional(struct mipi_dbi *mipi, bool cond)
{
struct device *dev = mipi->drm.dev;
+ struct mipi_dbi *dbi = mipi;
int ret;
if (mipi->regulator) {
@@ -657,11 +660,11 @@ static int mipi_dbi_poweron_reset_conditional(struct mipi_dbi *mipi, bool cond)
}
}
- if (cond && mipi_dbi_display_is_on(mipi))
+ if (cond && mipi_dbi_display_is_on(dbi))
return 1;
- mipi_dbi_hw_reset(mipi);
- ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);
+ mipi_dbi_hw_reset(dbi);
+ ret = mipi_dbi_command(dbi, MIPI_DCS_SOFT_RESET);
if (ret) {
DRM_DEV_ERROR(dev, "Failed to send reset command (%d)\n", ret);
if (mipi->regulator)
@@ -674,7 +677,7 @@ static int mipi_dbi_poweron_reset_conditional(struct mipi_dbi *mipi, bool cond)
* per MIPI DSC spec should wait 5ms after soft reset. If we didn't,
* we assume worst case and wait 120ms.
*/
- if (mipi->reset)
+ if (dbi->reset)
usleep_range(5000, 20000);
else
msleep(120);
@@ -763,15 +766,15 @@ static bool mipi_dbi_machine_little_endian(void)
* 76543210
*/
-static int mipi_dbi_spi1e_transfer(struct mipi_dbi *mipi, int dc,
+static int mipi_dbi_spi1e_transfer(struct mipi_dbi *dbi, int dc,
const void *buf, size_t len,
unsigned int bpw)
{
bool swap_bytes = (bpw == 16 && mipi_dbi_machine_little_endian());
- size_t chunk, max_chunk = mipi->tx_buf9_len;
- struct spi_device *spi = mipi->spi;
+ size_t chunk, max_chunk = dbi->tx_buf9_len;
+ struct spi_device *spi = dbi->spi;
struct spi_transfer tr = {
- .tx_buf = mipi->tx_buf9,
+ .tx_buf = dbi->tx_buf9,
.bits_per_word = 8,
};
struct spi_message m;
@@ -791,7 +794,7 @@ static int mipi_dbi_spi1e_transfer(struct mipi_dbi *mipi, int dc,
return -EINVAL;
/* Command: pad no-op's (zeroes) at beginning of block */
- dst = mipi->tx_buf9;
+ dst = dbi->tx_buf9;
memset(dst, 0, 9);
dst[8] = *src;
tr.len = 9;
@@ -811,7 +814,7 @@ static int mipi_dbi_spi1e_transfer(struct mipi_dbi *mipi, int dc,
chunk = min(len, max_chunk);
len -= chunk;
- dst = mipi->tx_buf9;
+ dst = dbi->tx_buf9;
if (chunk < 8) {
u8 val, carry = 0;
@@ -881,11 +884,11 @@ static int mipi_dbi_spi1e_transfer(struct mipi_dbi *mipi, int dc,
return 0;
}
-static int mipi_dbi_spi1_transfer(struct mipi_dbi *mipi, int dc,
+static int mipi_dbi_spi1_transfer(struct mipi_dbi *dbi, int dc,
const void *buf, size_t len,
unsigned int bpw)
{
- struct spi_device *spi = mipi->spi;
+ struct spi_device *spi = dbi->spi;
struct spi_transfer tr = {
.bits_per_word = 9,
};
@@ -897,11 +900,11 @@ static int mipi_dbi_spi1_transfer(struct mipi_dbi *mipi, int dc,
int ret;
if (!spi_is_bpw_supported(spi, 9))
- return mipi_dbi_spi1e_transfer(mipi, dc, buf, len, bpw);
+ return mipi_dbi_spi1e_transfer(dbi, dc, buf, len, bpw);
tr.speed_hz = mipi_dbi_spi_cmd_max_speed(spi, len);
- max_chunk = mipi->tx_buf9_len;
- dst16 = mipi->tx_buf9;
+ max_chunk = dbi->tx_buf9_len;
+ dst16 = dbi->tx_buf9;
if (drm_debug & DRM_UT_DRIVER)
pr_debug("[drm:%s] dc=%d, max_chunk=%zu, transfers:\n",
@@ -944,30 +947,30 @@ static int mipi_dbi_spi1_transfer(struct mipi_dbi *mipi, int dc,
return 0;
}
-static int mipi_dbi_typec1_command(struct mipi_dbi *mipi, u8 *cmd,
+static int mipi_dbi_typec1_command(struct mipi_dbi *dbi, u8 *cmd,
u8 *parameters, size_t num)
{
unsigned int bpw = (*cmd == MIPI_DCS_WRITE_MEMORY_START) ? 16 : 8;
int ret;
- if (mipi_dbi_command_is_read(mipi, *cmd))
+ if (mipi_dbi_command_is_read(dbi, *cmd))
return -ENOTSUPP;
MIPI_DBI_DEBUG_COMMAND(*cmd, parameters, num);
- ret = mipi_dbi_spi1_transfer(mipi, 0, cmd, 1, 8);
+ ret = mipi_dbi_spi1_transfer(dbi, 0, cmd, 1, 8);
if (ret || !num)
return ret;
- return mipi_dbi_spi1_transfer(mipi, 1, parameters, num, bpw);
+ return mipi_dbi_spi1_transfer(dbi, 1, parameters, num, bpw);
}
/* MIPI DBI Type C Option 3 */
-static int mipi_dbi_typec3_command_read(struct mipi_dbi *mipi, u8 *cmd,
+static int mipi_dbi_typec3_command_read(struct mipi_dbi *dbi, u8 *cmd,
u8 *data, size_t len)
{
- struct spi_device *spi = mipi->spi;
+ struct spi_device *spi = dbi->spi;
u32 speed_hz = min_t(u32, MIPI_DBI_MAX_SPI_READ_SPEED,
spi->max_speed_hz / 2);
struct spi_transfer tr[2] = {
@@ -1004,7 +1007,7 @@ static int mipi_dbi_typec3_command_read(struct mipi_dbi *mipi, u8 *cmd,
return -ENOMEM;
tr[1].rx_buf = buf;
- gpiod_set_value_cansleep(mipi->dc, 0);
+ gpiod_set_value_cansleep(dbi->dc, 0);
spi_message_init_with_transfers(&m, tr, ARRAY_SIZE(tr));
ret = spi_sync(spi, &m);
@@ -1028,41 +1031,41 @@ err_free:
return ret;
}
-static int mipi_dbi_typec3_command(struct mipi_dbi *mipi, u8 *cmd,
+static int mipi_dbi_typec3_command(struct mipi_dbi *dbi, u8 *cmd,
u8 *par, size_t num)
{
- struct spi_device *spi = mipi->spi;
+ struct spi_device *spi = dbi->spi;
unsigned int bpw = 8;
u32 speed_hz;
int ret;
- if (mipi_dbi_command_is_read(mipi, *cmd))
- return mipi_dbi_typec3_command_read(mipi, cmd, par, num);
+ if (mipi_dbi_command_is_read(dbi, *cmd))
+ return mipi_dbi_typec3_command_read(dbi, cmd, par, num);
MIPI_DBI_DEBUG_COMMAND(*cmd, par, num);
- gpiod_set_value_cansleep(mipi->dc, 0);
+ gpiod_set_value_cansleep(dbi->dc, 0);
speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
if (ret || !num)
return ret;
- if (*cmd == MIPI_DCS_WRITE_MEMORY_START && !mipi->swap_bytes)
+ if (*cmd == MIPI_DCS_WRITE_MEMORY_START && !dbi->swap_bytes)
bpw = 16;
- gpiod_set_value_cansleep(mipi->dc, 1);
+ gpiod_set_value_cansleep(dbi->dc, 1);
speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
}
/**
- * mipi_dbi_spi_init - Initialize MIPI DBI SPI interfaced controller
+ * mipi_dbi_spi_init - Initialize MIPI DBI SPI interface
* @spi: SPI device
- * @mipi: &mipi_dbi structure to initialize
+ * @dbi: MIPI DBI structure to initialize
* @dc: D/C gpio (optional)
*
- * This function sets &mipi_dbi->command, enables &mipi->read_commands for the
+ * This function sets &mipi_dbi->command, enables &mipi_dbi->read_commands for the
* usual read commands. It should be followed by a call to mipi_dbi_init() or
* a driver-specific init.
*
@@ -1078,7 +1081,7 @@ static int mipi_dbi_typec3_command(struct mipi_dbi *mipi, u8 *cmd,
* Returns:
* Zero on success, negative error code on failure.
*/
-int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
+int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *dbi,
struct gpio_desc *dc)
{
struct device *dev = &spi->dev;
@@ -1102,23 +1105,23 @@ int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
}
}
- mipi->spi = spi;
- mipi->read_commands = mipi_dbi_dcs_read_commands;
+ dbi->spi = spi;
+ dbi->read_commands = mipi_dbi_dcs_read_commands;
if (dc) {
- mipi->command = mipi_dbi_typec3_command;
- mipi->dc = dc;
+ dbi->command = mipi_dbi_typec3_command;
+ dbi->dc = dc;
if (mipi_dbi_machine_little_endian() && !spi_is_bpw_supported(spi, 16))
- mipi->swap_bytes = true;
+ dbi->swap_bytes = true;
} else {
- mipi->command = mipi_dbi_typec1_command;
- mipi->tx_buf9_len = SZ_16K;
- mipi->tx_buf9 = devm_kmalloc(dev, mipi->tx_buf9_len, GFP_KERNEL);
- if (!mipi->tx_buf9)
+ dbi->command = mipi_dbi_typec1_command;
+ dbi->tx_buf9_len = SZ_16K;
+ dbi->tx_buf9 = devm_kmalloc(dev, dbi->tx_buf9_len, GFP_KERNEL);
+ if (!dbi->tx_buf9)
return -ENOMEM;
}
- mutex_init(&mipi->cmdlock);
+ mutex_init(&dbi->cmdlock);
DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000);
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-18 16:47:08 +0000