Skip to content

Fix fb driver #2

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
gdyuldin wants to merge 2 commits into
base: R1CBU
Choose a base branch
from
Open

Fix fb driver #2

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
12bcd3d
Remove eth0 from interfaces
gdyuldin May 2, 2024
9316e30
Changes in patch
gdyuldin May 14, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
53 changes: 37 additions & 16 deletions br2_external/board/X6100/linux/lcd.patch
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,21 @@ diff -Naur orig/drivers/gpu/drm/panel/panel-jinglitai-jlt4013a.c my/drivers/gpu/
+};
+MODULE_DEVICE_TABLE(of, jlt4013a_of_match);
+
+static const struct drm_display_mode jlt4013a_default_display_mode = {
+ .clock = 27500,
+ .hdisplay = 480, /* x */
+ .hsync_start = 480 + 38, /* x + ri */
+ .hsync_end = 480 + 38 + 12, /* x + ri + hs */
+ .htotal = 480 + 38 + 12 + 12, /* x + ri + hs + le */
+ .vdisplay = 800, /* y */
+ .vsync_start = 800 + 18, /* y + lo */
+ .vsync_end = 800 + 18 + 8, /* y + lo + vs */
+ .vtotal = 800 + 18 + 8 + 17, /* y + lo + vs + up */
+ .width_mm = 52,
+ .height_mm = 86,
+};
+
+
+struct jlt4013a {
+ struct drm_panel panel;
+ struct spi_device *spi;
Expand All @@ -115,13 +130,17 @@ diff -Naur orig/drivers/gpu/drm/panel/panel-jinglitai-jlt4013a.c my/drivers/gpu/
+
+static int st7701s_write_command(struct jlt4013a *ctx, u8 cmd)
+{
+ pr_info("Jinglitai JLT4013A: Writing SPI command with value %x\n", cmd);
+
+ gpiod_set_value(ctx->dcx, 0);
+
+ return st7701s_spi_write(ctx, cmd);
+}
+
+static int st7701s_write_data(struct jlt4013a *ctx, u8 cmd)
+{
+ pr_info("Jinglitai JLT4013A: Writing SPI data with value %x\n", cmd);
+
+ gpiod_set_value(ctx->dcx, 1);
+
+ return st7701s_spi_write(ctx, cmd);
Expand Down Expand Up @@ -172,13 +191,26 @@ diff -Naur orig/drivers/gpu/drm/panel/panel-jinglitai-jlt4013a.c my/drivers/gpu/
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x10));
+
+ ST7701S_TRY(ret, st7701s_write_command(ctx, ST7701S_PORCTRL));
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x11));
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x02));
+ ST7701S_TRY(ret, st7701s_write_data(ctx,
+ jlt4013a_default_display_mode.vtotal
+ - jlt4013a_default_display_mode.vsync_end)); // mode.vtotal - mode.vsync_end
+ ST7701S_TRY(ret, st7701s_write_data(ctx,
+ jlt4013a_default_display_mode.vsync_start
+ - jlt4013a_default_display_mode.vdisplay)); // mode.vsync_start - mode.vdisplay
+
+ ST7701S_TRY(ret, st7701s_write_command(ctx, ST7701S_INVSET));
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x31));
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x03));
+
+ ST7701S_TRY(ret, st7701s_write_command(ctx, 0xC3));
+ ST7701S_TRY(ret, st7701s_write_data(ctx, 0x02)); // DataPolarity: negative (The data is input on the negative edge of DOTCLK)
+ ST7701S_TRY(ret, st7701s_write_data(ctx,
+ jlt4013a_default_display_mode.htotal
+ - jlt4013a_default_display_mode.hsync_end)); // HBP = mode.htotal - mode.hsync_end
+ ST7701S_TRY(ret, st7701s_write_data(ctx,
+ jlt4013a_default_display_mode.vsync_start
+ - jlt4013a_default_display_mode.vdisplay)); // VBP = mode.vsync_start - mode.vdisplay
+
+ /* Something strange */
+
+ ST7701S_TRY(ret, st7701s_write_command(ctx, 0xCC));
Expand Down Expand Up @@ -412,24 +444,13 @@ diff -Naur orig/drivers/gpu/drm/panel/panel-jinglitai-jlt4013a.c my/drivers/gpu/
+ return ret;
+}
+
+static const struct drm_display_mode jlt4013a_default_display_mode = {
+ .clock = 27500, /* pclk_khz */
+ .hdisplay = 480, /* x */
+ .hsync_start = 480 + 38, /* x + ri */
+ .hsync_end = 480 + 38 + 12, /* x + ri + hs */
+ .htotal = 480 + 38 + 12 + 12, /* x + ri + hs + le */
+ .vdisplay = 800, /* y */
+ .vsync_start = 800 + 18, /* y + lo */
+ .vsync_end = 800 + 18 + 8, /* y + lo + vs */
+ .vtotal = 800 + 18 + 18 + 4, /* y + lo + vs + up */
+ .width_mm = 52,
+ .height_mm = 86,
+};
+
+static int jlt4013a_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ static const u32 bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE;
+
+
+ struct drm_display_mode *mode = drm_mode_duplicate(
+ connector->dev, &jlt4013a_default_display_mode);
Expand All @@ -446,7 +467,7 @@ diff -Naur orig/drivers/gpu/drm/panel/panel-jinglitai-jlt4013a.c my/drivers/gpu/
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+ connector->display_info.bpc = 8;
+ connector->display_info.bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
+ connector->display_info.bus_flags = bus_flags;
+
+ drm_mode_probed_add(connector, mode);
+
Expand Down
2 changes: 2 additions & 0 deletions br2_external/board/X6100/linux/rootfs-overlay/etc/network/interfaces
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
auto lo
iface lo inet loopback