drm/tinydrm/mipi-dbi: Add mipi_dbi_init_with_formats()

The MIPI DBI standard support more pixel formats than what this helper
supports. Add an init function that lets the driver use different
format(s). This avoids open coding mipi_dbi_init() in st7586.

st7586 sets preferred_depth but this is not necessary since it only
supports one format.

v2: Forgot to remove the mipi->rotation assignment in st7586,
    mipi_dbi_init_with_formats() handles it.

Cc: David Lechner <david@lechnology.com>
Acked-by: David Lechner <david@lechnology.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190719155916.62465-11-noralf@tronnes.org

1 files changed, 6 insertions, 27 deletions

diff --git a/drivers/gpu/drm/tinydrm/st7586.c b/drivers/gpu/drm/tinydrm/st7586.c
index 7ae39004aa88..4046b0fc3f7a 100644
--- a/drivers/gpu/drm/tinydrm/st7586.c
+++ b/drivers/gpu/drm/tinydrm/st7586.c
@@ -24,7 +24,6 @@
 #include <drm/drm_rect.h>
 #include <drm/drm_vblank.h>
 #include <drm/tinydrm/mipi-dbi.h>
-#include <drm/tinydrm/tinydrm-helpers.h>
 
 /* controller-specific commands */
 #define ST7586_DISP_MODE_GRAY	0x38
@@ -283,12 +282,6 @@ static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
 	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
-static const struct drm_mode_config_funcs st7586_mode_config_funcs = {
-	.fb_create = drm_gem_fb_create_with_dirty,
-	.atomic_check = drm_atomic_helper_check,
-	.atomic_commit = drm_atomic_helper_commit,
-};
-
 static const struct drm_display_mode st7586_mode = {
 	DRM_SIMPLE_MODE(178, 128, 37, 27),
 };
@@ -342,15 +335,8 @@ static int st7586_probe(struct spi_device *spi)
 	}
 
 	drm_mode_config_init(drm);
-	drm->mode_config.preferred_depth = 32;
-	drm->mode_config.funcs = &st7586_mode_config_funcs;
-
-	mutex_init(&mipi->cmdlock);
 
 	bufsize = (st7586_mode.vdisplay + 2) / 3 * st7586_mode.hdisplay;
-	mipi->tx_buf = devm_kmalloc(dev, bufsize, GFP_KERNEL);
-	if (!mipi->tx_buf)
-		return -ENOMEM;
 
 	mipi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(mipi->reset)) {
@@ -365,7 +351,6 @@ static int st7586_probe(struct spi_device *spi)
 	}
 
 	device_property_read_u32(dev, "rotation", &rotation);
-	mipi->rotation = rotation;
 
 	ret = mipi_dbi_spi_init(spi, mipi, a0);
 	if (ret)
@@ -374,6 +359,12 @@ static int st7586_probe(struct spi_device *spi)
 	/* Cannot read from this controller via SPI */
 	mipi->read_commands = NULL;
 
+	ret = mipi_dbi_init_with_formats(mipi, &st7586_pipe_funcs,
+					 st7586_formats, ARRAY_SIZE(st7586_formats),
+					 &st7586_mode, rotation, bufsize);
+	if (ret)
+		return ret;
+
 	/*
 	 * we are using 8-bit data, so we are not actually swapping anything,
 	 * but setting mipi->swap_bytes makes mipi_dbi_typec3_command() do the
@@ -383,15 +374,6 @@ static int st7586_probe(struct spi_device *spi)
 	 */
 	mipi->swap_bytes = true;
 
-	ret = tinydrm_display_pipe_init(drm, &mipi->pipe, &st7586_pipe_funcs,
-					DRM_MODE_CONNECTOR_SPI,
-					st7586_formats, ARRAY_SIZE(st7586_formats),
-					&st7586_mode, rotation);
-	if (ret)
-		return ret;
-
-	drm_plane_enable_fb_damage_clips(&mipi->pipe.plane);
-
 	drm_mode_config_reset(drm);
 
 	ret = drm_dev_register(drm, 0);
@@ -400,9 +382,6 @@ static int st7586_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, drm);
 
-	DRM_DEBUG_KMS("preferred_depth=%u, rotation = %u\n",
-		      drm->mode_config.preferred_depth, rotation);
-
 	drm_fbdev_generic_setup(drm, 0);
 
 	return 0;