On Mi, 2024-06-26 at 16:40 +0200, Philipp Zabel wrote:
> 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@xxxxxxxxxxxxxx>
Gentle ping, this still cleanly applies on drm-misc-next.
> ---
> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> index 084c37fa7348..b4565ff1a0de 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> @@ -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;
> + }
> +
Is there anything wrong with the panel driver eating the bottom-up
panel orientation property by flipping scanout in the panel?
regards
Philipp
> 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 = {
>
