The SPI access to s6e63m0 is using the DBI protocol, so switch
to using the elaborate DBI protocol implementation in the DRM
DBI helper library.
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: Noralf Trønnes <noralf@xxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
drivers/gpu/drm/panel/Kconfig | 1 +
.../gpu/drm/panel/panel-samsung-s6e63m0-dsi.c | 10 ++-
.../gpu/drm/panel/panel-samsung-s6e63m0-spi.c | 85 ++++++++-----------
drivers/gpu/drm/panel/panel-samsung-s6e63m0.c | 41 ++-------
drivers/gpu/drm/panel/panel-samsung-s6e63m0.h | 33 ++++++-
5 files changed, 81 insertions(+), 89 deletions(-)
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 4894913936e9..324b932ac213 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -376,6 +376,7 @@ config DRM_PANEL_SAMSUNG_S6E63M0_SPI
depends on SPI
depends on DRM_PANEL_SAMSUNG_S6E63M0
default DRM_PANEL_SAMSUNG_S6E63M0
+ select DRM_MIPI_DBI
help
Say Y here if you want to be able to access the Samsung
S6E63M0 panel using SPI.
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
index 07a48f621289..e0b1a7e354f3 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
@@ -16,7 +16,8 @@
#define MCS_GLOBAL_PARAM 0xb0
#define S6E63M0_DSI_MAX_CHUNK 15 /* CMD + 15 bytes max */
-static int s6e63m0_dsi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
+static int s6e63m0_dsi_dcs_read(struct device *dev, void *trsp,
+ const u8 cmd, u8 *data)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
int ret;
@@ -32,7 +33,8 @@ static int s6e63m0_dsi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
return 0;
}
-static int s6e63m0_dsi_dcs_write(struct device *dev, const u8 *data, size_t len)
+static int s6e63m0_dsi_dcs_write(struct device *dev, void *trsp,
+ const u8 *data, size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
const u8 *seqp = data;
@@ -99,8 +101,8 @@ static int s6e63m0_dsi_probe(struct mipi_dsi_device *dsi)
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_BURST;
- ret = s6e63m0_probe(dev, s6e63m0_dsi_dcs_read, s6e63m0_dsi_dcs_write,
- true);
+ ret = s6e63m0_probe(dev, NULL, s6e63m0_dsi_dcs_read,
+ s6e63m0_dsi_dcs_write, true);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
index 326deb3177b6..293c18ee448a 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
@@ -5,62 +5,42 @@
#include <linux/spi/spi.h>
#include <linux/delay.h>
+#include <drm/drm_mipi_dbi.h>
#include <drm/drm_print.h>
#include "panel-samsung-s6e63m0.h"
-#define DATA_MASK 0x100
+static const u8 s6e63m0_dbi_read_commands[] = {
+ MCS_READ_ID1,
+ MCS_READ_ID2,
+ MCS_READ_ID3,
+ 0, /* sentinel */
+};
-static int s6e63m0_spi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
+static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
+ const u8 cmd, u8 *data)
{
- struct spi_device *spi = to_spi_device(dev);
- u16 buf[1];
- u16 rbuf[1];
+ struct mipi_dbi *dbi = trsp;
int ret;
- /* SPI buffers are always in CPU order */
- buf[0] = (u16)cmd;
- ret = spi_write_then_read(spi, buf, 2, rbuf, 2);
- dev_dbg(dev, "READ CMD: %04x RET: %04x\n", buf[0], rbuf[0]);
- if (!ret)
- /* These high 8 bits of the 9 contains the readout */
- *data = (rbuf[0] & 0x1ff) >> 1;
+ ret = mipi_dbi_command_read(dbi, cmd, data);
+ if (ret)
+ dev_err(dev, "error on DBI read command %02x\n", cmd);
+ else
+ dev_dbg(dev, "read DBI %02x\n", *data);
return ret;
}
-static int s6e63m0_spi_write_word(struct device *dev, u16 data)
-{
- struct spi_device *spi = to_spi_device(dev);
-
- /* SPI buffers are always in CPU order */
- return spi_write(spi, &data, 2);
-}
-
-static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
+static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
+ const u8 *data, size_t len)
{
- int ret = 0;
+ struct mipi_dbi *dbi = trsp;
+ int ret;
dev_dbg(dev, "SPI writing dcs seq: %*ph\n", (int)len, data);
- /*
- * This sends 9 bits with the first bit (bit 8) set to 0
- * This indicates that this is a command. Anything after the
- * command is data.
- */
- ret = s6e63m0_spi_write_word(dev, *data);
-
- while (!ret && --len) {
- ++data;
- /* This sends 9 bits with the first bit (bit 8) set to 1 */
- ret = s6e63m0_spi_write_word(dev, *data | DATA_MASK);
- }
-
- if (ret) {
- dev_err(dev, "SPI error %d writing dcs seq: %*ph\n", ret,
- (int)len, data);
- }
-
+ ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
usleep_range(300, 310);
return ret;
@@ -69,18 +49,23 @@ static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
static int s6e63m0_spi_probe(struct spi_device *spi)
{
struct device *dev = &spi->dev;
+ struct mipi_dbi *dbi;
int ret;
- spi->bits_per_word = 9;
- /* Preserve e.g. SPI_3WIRE setting */
- spi->mode |= SPI_MODE_3;
- ret = spi_setup(spi);
- if (ret < 0) {
- dev_err(dev, "spi setup failed.\n");
- return ret;
- }
- return s6e63m0_probe(dev, s6e63m0_spi_dcs_read, s6e63m0_spi_dcs_write,
- false);
+ dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
+ if (!dbi)
+ return -ENOMEM;
+
+ ret = mipi_dbi_spi_init(spi, dbi, NULL);
+ if (ret)
+ return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
+ /* Register our custom MCS read commands */
+ dbi->read_commands = s6e63m0_dbi_read_commands;
+
+ spi_set_drvdata(spi, dbi);
+
+ return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
+ s6e63m0_spi_dcs_write, false);
}
static int s6e63m0_spi_remove(struct spi_device *spi)
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
index 5e4d2e8aa7a7..3a8a772245c0 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
@@ -24,31 +24,6 @@
#include "panel-samsung-s6e63m0.h"
-/* Manufacturer Command Set */
-#define MCS_ELVSS_ON 0xb1
-#define MCS_TEMP_SWIRE 0xb2
-#define MCS_PENTILE_1 0xb3
-#define MCS_PENTILE_2 0xb4
-#define MCS_GAMMA_DELTA_Y_RED 0xb5
-#define MCS_GAMMA_DELTA_X_RED 0xb6
-#define MCS_GAMMA_DELTA_Y_GREEN 0xb7
-#define MCS_GAMMA_DELTA_X_GREEN 0xb8
-#define MCS_GAMMA_DELTA_Y_BLUE 0xb9
-#define MCS_GAMMA_DELTA_X_BLUE 0xba
-#define MCS_MIECTL1 0xc0
-#define MCS_BCMODE 0xc1
-#define MCS_ERROR_CHECK 0xd5
-#define MCS_READ_ID1 0xda
-#define MCS_READ_ID2 0xdb
-#define MCS_READ_ID3 0xdc
-#define MCS_LEVEL_2_KEY 0xf0
-#define MCS_MTP_KEY 0xf1
-#define MCS_DISCTL 0xf2
-#define MCS_SRCCTL 0xf6
-#define MCS_IFCTL 0xf7
-#define MCS_PANELCTL 0xf8
-#define MCS_PGAMMACTL 0xfa
-
#define S6E63M0_LCD_ID_VALUE_M2 0xA4
#define S6E63M0_LCD_ID_VALUE_SM2 0xB4
#define S6E63M0_LCD_ID_VALUE_SM2_1 0xB6
@@ -285,8 +260,9 @@ static u8 const s6e63m0_elvss_per_gamma[NUM_GAMMA_LEVELS] = {
struct s6e63m0 {
struct device *dev;
- int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val);
- int (*dcs_write)(struct device *dev, const u8 *data, size_t len);
+ void *transport_data;
+ int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val);
+ int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len);
struct drm_panel panel;
struct backlight_device *bl_dev;
u8 lcd_type;
@@ -342,7 +318,7 @@ static void s6e63m0_dcs_read(struct s6e63m0 *ctx, const u8 cmd, u8 *data)
if (ctx->error < 0)
return;
- ctx->error = ctx->dcs_read(ctx->dev, cmd, data);
+ ctx->error = ctx->dcs_read(ctx->dev, ctx->transport_data, cmd, data);
}
static void s6e63m0_dcs_write(struct s6e63m0 *ctx, const u8 *data, size_t len)
@@ -350,7 +326,7 @@ static void s6e63m0_dcs_write(struct s6e63m0 *ctx, const u8 *data, size_t len)
if (ctx->error < 0 || len == 0)
return;
- ctx->error = ctx->dcs_write(ctx->dev, data, len);
+ ctx->error = ctx->dcs_write(ctx->dev, ctx->transport_data, data, len);
}
#define s6e63m0_dcs_write_seq_static(ctx, seq ...) \
@@ -727,9 +703,9 @@ static irqreturn_t s6e63m0_esd_irq(int irq, void *data)
return IRQ_HANDLED;
}
-int s6e63m0_probe(struct device *dev,
- int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val),
- int (*dcs_write)(struct device *dev, const u8 *data, size_t len),
+int s6e63m0_probe(struct device *dev, void *trsp,
+ int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val),
+ int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len),
bool dsi_mode)
{
struct s6e63m0 *ctx;
@@ -741,6 +717,7 @@ int s6e63m0_probe(struct device *dev,
if (!ctx)
return -ENOMEM;
+ ctx->transport_data = trsp;
ctx->dsi_mode = dsi_mode;
ctx->dcs_read = dcs_read;
ctx->dcs_write = dcs_write;
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
index c669fec91763..306605ed1117 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
@@ -3,9 +3,36 @@
#ifndef _PANEL_SAMSUNG_S6E63M0_H
#define _PANEL_SAMSUNG_S6E63M0_H
-int s6e63m0_probe(struct device *dev,
- int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val),
- int (*dcs_write)(struct device *dev, const u8 *data,
+/* Manufacturer Command Set */
+#define MCS_ELVSS_ON 0xb1
+#define MCS_TEMP_SWIRE 0xb2
+#define MCS_PENTILE_1 0xb3
+#define MCS_PENTILE_2 0xb4
+#define MCS_GAMMA_DELTA_Y_RED 0xb5
+#define MCS_GAMMA_DELTA_X_RED 0xb6
+#define MCS_GAMMA_DELTA_Y_GREEN 0xb7
+#define MCS_GAMMA_DELTA_X_GREEN 0xb8
+#define MCS_GAMMA_DELTA_Y_BLUE 0xb9
+#define MCS_GAMMA_DELTA_X_BLUE 0xba
+#define MCS_MIECTL1 0xc0
+#define MCS_BCMODE 0xc1
+#define MCS_ERROR_CHECK 0xd5
+#define MCS_READ_ID1 0xda
+#define MCS_READ_ID2 0xdb
+#define MCS_READ_ID3 0xdc
+#define MCS_LEVEL_2_KEY 0xf0
+#define MCS_MTP_KEY 0xf1
+#define MCS_DISCTL 0xf2
+#define MCS_SRCCTL 0xf6
+#define MCS_IFCTL 0xf7
+#define MCS_PANELCTL 0xf8
+#define MCS_PGAMMACTL 0xfa
+
+int s6e63m0_probe(struct device *dev, void *trsp,
+ int (*dcs_read)(struct device *dev, void *trsp,
+ const u8 cmd, u8 *val),
+ int (*dcs_write)(struct device *dev, void *trsp,
+ const u8 *data,
size_t len),
bool dsi_mode);
int s6e63m0_remove(struct device *dev);
--
2.31.1
