[PATCH v2 2/2] drm/ssd130x: Add support for the SSD133x OLED controller family
Javier Martinez Canillas
javierm at redhat.com
Mon Dec 18 13:20:36 UTC 2023
The Solomon SSD133x controllers (such as the SSD1331) are used by RGB dot
matrix OLED panels, add a modesetting pipeline to support the chip family.
The SSD133x controllers support 256 (8-bit) and 65k (16-bit) color depths
but only the former is implemented for now. This is because the 256 color
depth format matches a fourcc code already present in DRM (RGB8), but the
65k pixel format does not match the existing RG16 fourcc code format.
Instead of a R:G:B 5:6:5, the controller expects the 16-bit pixels to be
R:G:B 6:5:6, and so a new fourcc needs to be added to support this format.
Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
---
(no changes since v1)
drivers/gpu/drm/solomon/ssd130x-i2c.c | 5 +
drivers/gpu/drm/solomon/ssd130x-spi.c | 7 +
drivers/gpu/drm/solomon/ssd130x.c | 370 ++++++++++++++++++++++++++
drivers/gpu/drm/solomon/ssd130x.h | 5 +-
4 files changed, 386 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/solomon/ssd130x-i2c.c b/drivers/gpu/drm/solomon/ssd130x-i2c.c
index f2ccab9c06d9..a047dbec4e48 100644
--- a/drivers/gpu/drm/solomon/ssd130x-i2c.c
+++ b/drivers/gpu/drm/solomon/ssd130x-i2c.c
@@ -105,6 +105,11 @@ static const struct of_device_id ssd130x_of_match[] = {
.compatible = "solomon,ssd1327",
.data = &ssd130x_variants[SSD1327_ID],
},
+ /* ssd133x family */
+ {
+ .compatible = "solomon,ssd1331",
+ .data = &ssd130x_variants[SSD1331_ID],
+ },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ssd130x_of_match);
diff --git a/drivers/gpu/drm/solomon/ssd130x-spi.c b/drivers/gpu/drm/solomon/ssd130x-spi.c
index 84e035a7ab3f..84bfde31d172 100644
--- a/drivers/gpu/drm/solomon/ssd130x-spi.c
+++ b/drivers/gpu/drm/solomon/ssd130x-spi.c
@@ -142,6 +142,11 @@ static const struct of_device_id ssd130x_of_match[] = {
.compatible = "solomon,ssd1327",
.data = &ssd130x_variants[SSD1327_ID],
},
+ /* ssd133x family */
+ {
+ .compatible = "solomon,ssd1331",
+ .data = &ssd130x_variants[SSD1331_ID],
+ },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ssd130x_of_match);
@@ -166,6 +171,8 @@ static const struct spi_device_id ssd130x_spi_table[] = {
{ "ssd1322", SSD1322_ID },
{ "ssd1325", SSD1325_ID },
{ "ssd1327", SSD1327_ID },
+ /* ssd133x family */
+ { "ssd1331", SSD1331_ID },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(spi, ssd130x_spi_table);
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
index bef293922b98..447d0c7c88c6 100644
--- a/drivers/gpu/drm/solomon/ssd130x.c
+++ b/drivers/gpu/drm/solomon/ssd130x.c
@@ -119,6 +119,26 @@
#define SSD130X_SET_VCOMH_VOLTAGE 0xbe
#define SSD132X_SET_FUNCTION_SELECT_B 0xd5
+/* ssd133x commands */
+#define SSD133X_SET_COL_RANGE 0x15
+#define SSD133X_SET_ROW_RANGE 0x75
+#define SSD133X_CONTRAST_A 0x81
+#define SSD133X_CONTRAST_B 0x82
+#define SSD133X_CONTRAST_C 0x83
+#define SSD133X_SET_MASTER_CURRENT 0x87
+#define SSD132X_SET_PRECHARGE_A 0x8a
+#define SSD132X_SET_PRECHARGE_B 0x8b
+#define SSD132X_SET_PRECHARGE_C 0x8c
+#define SSD133X_SET_DISPLAY_START 0xa1
+#define SSD133X_SET_DISPLAY_OFFSET 0xa2
+#define SSD133X_SET_DISPLAY_NORMAL 0xa4
+#define SSD133X_SET_MASTER_CONFIG 0xad
+#define SSD133X_POWER_SAVE_MODE 0xb0
+#define SSD133X_PHASES_PERIOD 0xb1
+#define SSD133X_SET_CLOCK_FREQ 0xb3
+#define SSD133X_SET_PRECHARGE_VOLTAGE 0xbb
+#define SSD133X_SET_VCOMH_VOLTAGE 0xbe
+
#define MAX_CONTRAST 255
const struct ssd130x_deviceinfo ssd130x_variants[] = {
@@ -180,6 +200,12 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
.default_width = 128,
.default_height = 128,
.family_id = SSD132X_FAMILY,
+ },
+ /* ssd133x family */
+ [SSD1331_ID] = {
+ .default_width = 96,
+ .default_height = 64,
+ .family_id = SSD133X_FAMILY,
}
};
EXPORT_SYMBOL_NS_GPL(ssd130x_variants, DRM_SSD130X);
@@ -589,6 +615,117 @@ static int ssd132x_init(struct ssd130x_device *ssd130x)
return 0;
}
+static int ssd133x_init(struct ssd130x_device *ssd130x)
+{
+ int ret;
+
+ /* Set color A contrast */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_A, 0x91);
+ if (ret < 0)
+ return ret;
+
+ /* Set color B contrast */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_B, 0x50);
+ if (ret < 0)
+ return ret;
+
+ /* Set color C contrast */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_C, 0x7d);
+ if (ret < 0)
+ return ret;
+
+ /* Set master current */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_MASTER_CURRENT, 0x06);
+ if (ret < 0)
+ return ret;
+
+ /* Set column start and end */
+ ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_COL_RANGE, 0x00, ssd130x->width - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Set row start and end */
+ ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_ROW_RANGE, 0x00, ssd130x->height - 1);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Horizontal Address Increment
+ * Normal order SA,SB,SC (e.g. RGB)
+ * COM Split Odd Even
+ * 256 color format
+ */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD13XX_SET_SEG_REMAP, 0x20);
+ if (ret < 0)
+ return ret;
+
+ /* Set display start and offset */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_DISPLAY_START, 0x00);
+ if (ret < 0)
+ return ret;
+
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_DISPLAY_OFFSET, 0x00);
+ if (ret < 0)
+ return ret;
+
+ /* Set display mode normal */
+ ret = ssd130x_write_cmd(ssd130x, 1, SSD133X_SET_DISPLAY_NORMAL);
+ if (ret < 0)
+ return ret;
+
+ /* Set multiplex ratio value */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD13XX_SET_MULTIPLEX_RATIO, ssd130x->height - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Set master configuration */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_MASTER_CONFIG, 0x8e);
+ if (ret < 0)
+ return ret;
+
+ /* Set power mode */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_POWER_SAVE_MODE, 0x0b);
+ if (ret < 0)
+ return ret;
+
+ /* Set Phase 1 and 2 period */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_PHASES_PERIOD, 0x31);
+ if (ret < 0)
+ return ret;
+
+ /* Set clock divider */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_CLOCK_FREQ, 0xf0);
+ if (ret < 0)
+ return ret;
+
+ /* Set pre-charge A */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_A, 0x64);
+ if (ret < 0)
+ return ret;
+
+ /* Set pre-charge B */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_B, 0x78);
+ if (ret < 0)
+ return ret;
+
+ /* Set pre-charge C */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_C, 0x64);
+ if (ret < 0)
+ return ret;
+
+ /* Set pre-charge level */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_PRECHARGE_VOLTAGE, 0x3a);
+ if (ret < 0)
+ return ret;
+
+ /* Set VCOMH voltage */
+ ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_VCOMH_VOLTAGE, 0x3e);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
static int ssd130x_update_rect(struct ssd130x_device *ssd130x,
struct drm_rect *rect, u8 *buf,
u8 *data_array)
@@ -753,6 +890,47 @@ static int ssd132x_update_rect(struct ssd130x_device *ssd130x,
return ret;
}
+static int ssd133x_update_rect(struct ssd130x_device *ssd130x,
+ struct drm_rect *rect, u8 *data_array,
+ unsigned int pitch)
+{
+ unsigned int x = rect->x1;
+ unsigned int y = rect->y1;
+ unsigned int columns = drm_rect_width(rect);
+ unsigned int rows = drm_rect_height(rect);
+ int ret;
+
+ /*
+ * The screen is divided in Segment and Common outputs, where
+ * COM0 to COM[N - 1] are the rows and SEG0 to SEG[M - 1] are
+ * the columns.
+ *
+ * Each Segment has a 8-bit pixel and each Common output has a
+ * row of pixels. When using the (default) horizontal address
+ * increment mode, each byte of data sent to the controller has
+ * a Segment (e.g: SEG0).
+ *
+ * When using the 256 color depth format, each pixel contains 3
+ * sub-pixels for color A, B and C. These have 3 bit, 3 bit and
+ * 2 bits respectively.
+ */
+
+ /* Set column start and end */
+ ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_COL_RANGE, x, columns - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Set row start and end */
+ ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_ROW_RANGE, y, rows - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Write out update in one go since horizontal addressing mode is used */
+ ret = ssd130x_write_data(ssd130x, data_array, pitch * rows);
+
+ return ret;
+}
+
static void ssd130x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
{
unsigned int pages = DIV_ROUND_UP(ssd130x->height, SSD130X_PAGE_HEIGHT);
@@ -805,6 +983,22 @@ static void ssd132x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
ssd130x_write_data(ssd130x, data_array, columns * height);
}
+static void ssd133x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
+{
+ const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+ unsigned int pitch;
+
+ if (!fi)
+ return;
+
+ pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width);
+
+ memset(data_array, 0, pitch * ssd130x->height);
+
+ /* Write out update in one go since horizontal addressing mode is used */
+ ssd130x_write_data(ssd130x, data_array, pitch * ssd130x->height);
+}
+
static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb,
const struct iosys_map *vmap,
struct drm_rect *rect,
@@ -866,6 +1060,36 @@ static int ssd132x_fb_blit_rect(struct drm_framebuffer *fb,
return ret;
}
+static int ssd133x_fb_blit_rect(struct drm_framebuffer *fb,
+ const struct iosys_map *vmap,
+ struct drm_rect *rect, u8 *data_array,
+ struct drm_format_conv_state *fmtcnv_state)
+{
+ struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev);
+ const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+ unsigned int dst_pitch;
+ struct iosys_map dst;
+ int ret = 0;
+
+ if (!fi)
+ return -EINVAL;
+
+ dst_pitch = drm_format_info_min_pitch(fi, 0, drm_rect_width(rect));
+
+ ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+ if (ret)
+ return ret;
+
+ iosys_map_set_vaddr(&dst, data_array);
+ drm_fb_xrgb8888_to_rgb332(&dst, &dst_pitch, vmap, fb, rect, fmtcnv_state);
+
+ drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
+
+ ssd133x_update_rect(ssd130x, rect, data_array, dst_pitch);
+
+ return ret;
+}
+
static int ssd130x_primary_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
@@ -964,6 +1188,29 @@ static int ssd132x_primary_plane_atomic_check(struct drm_plane *plane,
return 0;
}
+static int ssd133x_primary_plane_atomic_check(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_crtc *crtc = plane_state->crtc;
+ struct drm_crtc_state *crtc_state = NULL;
+ int ret;
+
+ if (crtc)
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+ ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state,
+ DRM_PLANE_NO_SCALING,
+ DRM_PLANE_NO_SCALING,
+ false, false);
+ if (ret)
+ return ret;
+ else if (!plane_state->visible)
+ return 0;
+
+ return 0;
+}
+
static void ssd130x_primary_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
@@ -1034,6 +1281,39 @@ static void ssd132x_primary_plane_atomic_update(struct drm_plane *plane,
drm_dev_exit(idx);
}
+static void ssd133x_primary_plane_atomic_update(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+ struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
+ struct ssd130x_crtc_state *ssd130x_crtc_state = to_ssd130x_crtc_state(crtc_state);
+ struct drm_framebuffer *fb = plane_state->fb;
+ struct drm_atomic_helper_damage_iter iter;
+ struct drm_device *drm = plane->dev;
+ struct drm_rect dst_clip;
+ struct drm_rect damage;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
+ drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+ drm_atomic_for_each_plane_damage(&iter, &damage) {
+ dst_clip = plane_state->dst;
+
+ if (!drm_rect_intersect(&dst_clip, &damage))
+ continue;
+
+ ssd133x_fb_blit_rect(fb, &shadow_plane_state->data[0], &dst_clip,
+ ssd130x_crtc_state->data_array,
+ &shadow_plane_state->fmtcnv_state);
+ }
+
+ drm_dev_exit(idx);
+}
+
static void ssd130x_primary_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
@@ -1082,6 +1362,30 @@ static void ssd132x_primary_plane_atomic_disable(struct drm_plane *plane,
drm_dev_exit(idx);
}
+static void ssd133x_primary_plane_atomic_disable(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *drm = plane->dev;
+ struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+ struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_crtc_state *crtc_state;
+ struct ssd130x_crtc_state *ssd130x_crtc_state;
+ int idx;
+
+ if (!plane_state->crtc)
+ return;
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
+ ssd130x_crtc_state = to_ssd130x_crtc_state(crtc_state);
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
+ ssd133x_clear_screen(ssd130x, ssd130x_crtc_state->data_array);
+
+ drm_dev_exit(idx);
+}
+
/* Called during init to allocate the plane's atomic state. */
static void ssd130x_primary_plane_reset(struct drm_plane *plane)
{
@@ -1144,6 +1448,12 @@ static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs[]
.atomic_check = ssd132x_primary_plane_atomic_check,
.atomic_update = ssd132x_primary_plane_atomic_update,
.atomic_disable = ssd132x_primary_plane_atomic_disable,
+ },
+ [SSD133X_FAMILY] = {
+ DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+ .atomic_check = ssd133x_primary_plane_atomic_check,
+ .atomic_update = ssd133x_primary_plane_atomic_update,
+ .atomic_disable = ssd133x_primary_plane_atomic_disable,
}
};
@@ -1214,6 +1524,33 @@ static int ssd132x_crtc_atomic_check(struct drm_crtc *crtc,
return 0;
}
+static int ssd133x_crtc_atomic_check(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *drm = crtc->dev;
+ struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ struct ssd130x_crtc_state *ssd130x_state = to_ssd130x_crtc_state(crtc_state);
+ const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+ unsigned int pitch;
+ int ret;
+
+ if (!fi)
+ return -EINVAL;
+
+ ret = drm_crtc_helper_atomic_check(crtc, state);
+ if (ret)
+ return ret;
+
+ pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width);
+
+ ssd130x_state->data_array = kmalloc(pitch * ssd130x->height, GFP_KERNEL);
+ if (!ssd130x_state->data_array)
+ return -ENOMEM;
+
+ return 0;
+}
+
/* Called during init to allocate the CRTC's atomic state. */
static void ssd130x_crtc_reset(struct drm_crtc *crtc)
{
@@ -1275,6 +1612,10 @@ static const struct drm_crtc_helper_funcs ssd130x_crtc_helper_funcs[] = {
.mode_valid = ssd130x_crtc_mode_valid,
.atomic_check = ssd132x_crtc_atomic_check,
},
+ [SSD133X_FAMILY] = {
+ .mode_valid = ssd130x_crtc_mode_valid,
+ .atomic_check = ssd133x_crtc_atomic_check,
+ },
};
static const struct drm_crtc_funcs ssd130x_crtc_funcs = {
@@ -1337,6 +1678,31 @@ static void ssd132x_encoder_atomic_enable(struct drm_encoder *encoder,
ssd130x_power_off(ssd130x);
}
+static void ssd133x_encoder_atomic_enable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *drm = encoder->dev;
+ struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+ int ret;
+
+ ret = ssd130x_power_on(ssd130x);
+ if (ret)
+ return;
+
+ ret = ssd133x_init(ssd130x);
+ if (ret)
+ goto power_off;
+
+ ssd130x_write_cmd(ssd130x, 1, SSD13XX_DISPLAY_ON);
+
+ backlight_enable(ssd130x->bl_dev);
+
+ return;
+
+power_off:
+ ssd130x_power_off(ssd130x);
+}
+
static void ssd130x_encoder_atomic_disable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
@@ -1358,6 +1724,10 @@ static const struct drm_encoder_helper_funcs ssd130x_encoder_helper_funcs[] = {
[SSD132X_FAMILY] = {
.atomic_enable = ssd132x_encoder_atomic_enable,
.atomic_disable = ssd130x_encoder_atomic_disable,
+ },
+ [SSD133X_FAMILY] = {
+ .atomic_enable = ssd133x_encoder_atomic_enable,
+ .atomic_disable = ssd130x_encoder_atomic_disable,
}
};
diff --git a/drivers/gpu/drm/solomon/ssd130x.h b/drivers/gpu/drm/solomon/ssd130x.h
index 075c5c3ee75a..a4554018bb2a 100644
--- a/drivers/gpu/drm/solomon/ssd130x.h
+++ b/drivers/gpu/drm/solomon/ssd130x.h
@@ -25,7 +25,8 @@
enum ssd130x_family_ids {
SSD130X_FAMILY,
- SSD132X_FAMILY
+ SSD132X_FAMILY,
+ SSD133X_FAMILY
};
enum ssd130x_variants {
@@ -39,6 +40,8 @@ enum ssd130x_variants {
SSD1322_ID,
SSD1325_ID,
SSD1327_ID,
+ /* ssd133x family */
+ SSD1331_ID,
NR_SSD130X_VARIANTS
};
--
2.43.0
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