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drm/panel: ilitek-ili9881c: Explicitly set address mode, allow 180° rotation

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We can use horizontal and vertical flipping via the MIPI DCS address
mode to rotate the display by 180° using the device tree "rotation"
property. Since the tl050hdv35 panel has been defined as rotated,
we have to invert the bits there.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240626-drm-panel-ili9881c-rotation-v1-1-e0ff54173e32@pengutronix.de
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240626-drm-panel-ili9881c-rotation-v1-1-e0ff54173e32@pengutronix.de
This commit is contained in:
Philipp Zabel 2024-06-26 16:40:38 +02:00 committed by Neil Armstrong
parent 15bda06bc9
commit b64e7d59ba
1 changed files with 17 additions and 2 deletions
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19
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
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@ -42,6 +42,7 @@ struct ili9881c_desc {
const size_t init_length;
const struct drm_display_mode *mode;
const unsigned long mode_flags;
u8 default_address_mode;
};
struct ili9881c {
@ -53,6 +54,7 @@ struct ili9881c {
struct gpio_desc *reset;
enum drm_panel_orientation orientation;
u8 address_mode;
};
#define ILI9881C_SWITCH_PAGE_INSTR(_page) \
@ -815,8 +817,6 @@ static const struct ili9881c_instr tl050hdv35_init[] = {
ILI9881C_COMMAND_INSTR(0xd1, 0x4b),
ILI9881C_COMMAND_INSTR(0xd2, 0x60),
ILI9881C_COMMAND_INSTR(0xd3, 0x39),
ILI9881C_SWITCH_PAGE_INSTR(0),
ILI9881C_COMMAND_INSTR(0x36, 0x03),
};
static const struct ili9881c_instr w552946ab_init[] = {
@ -1299,6 +1299,14 @@ static int ili9881c_prepare(struct drm_panel *panel)
if (ret)
return ret;
if (ctx->address_mode) {
ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_ADDRESS_MODE,
&ctx->address_mode,
sizeof(ctx->address_mode));
if (ret < 0)
return ret;
}
ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret)
return ret;
@ -1521,6 +1529,12 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
return ret;
}
ctx->address_mode = ctx->desc->default_address_mode;
if (ctx->orientation == DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP) {
ctx->address_mode ^= 0x03;
ctx->orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;
}
ctx->panel.prepare_prev_first = true;
ret = drm_panel_of_backlight(&ctx->panel);
@ -1572,6 +1586,7 @@ static const struct ili9881c_desc tl050hdv35_desc = {
.mode = &tl050hdv35_default_mode,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_MODE_LPM,
.default_address_mode = 0x03,
};
static const struct ili9881c_desc w552946aba_desc = {