Commit a56a6b81 authored by Lad Prabhakar's avatar Lad Prabhakar Committed by Biju Das
Browse files

drm: renesas: rz-du: mipi_dsi: Add feature flag for 16BPP support 



Introduce the `RZ_MIPI_DSI_FEATURE_16BPP` flag in `rzg2l_mipi_dsi_hw_info`
to indicate support for 16BPP pixel formats. The RZ/V2H(P) SoC supports
16BPP, whereas this feature is missing on the RZ/G2L SoC.

Update the `mipi_dsi_host_attach()` function to check this flag before
allowing 16BPP formats. If the SoC does not support 16BPP, return an error
to prevent incorrect format selection.

This change enables finer-grained format support control for different
SoC variants.

Co-developed-by: default avatarFabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: default avatarFabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: default avatarLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250609225630.502888-8-prabhakar.mahadev-lad.rj@bp.renesas.com
parent 7c3fecdd

drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c

+11 −0
Original line number Diff line number Diff line
@@ -34,6 +34,8 @@ 


#define RZG2L_DCS_BUF_SIZE	128 /* Maximum DCS buffer size in external memory. */



#define RZ_MIPI_DSI_FEATURE_16BPP	BIT(0)



struct rzg2l_mipi_dsi;



struct rzg2l_mipi_dsi_hw_info {
@@ -43,6 +45,7 @@ struct rzg2l_mipi_dsi_hw_info { 
	u32 link_reg_offset;

	unsigned long min_dclk;

	unsigned long max_dclk;

	u8 features;

};



struct rzg2l_mipi_dsi {
@@ -672,8 +675,16 @@ static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host, 


	switch (mipi_dsi_pixel_format_to_bpp(device->format)) {

	case 24:

		break;

	case 18:

		break;

	case 16:

		if (!(dsi->info->features & RZ_MIPI_DSI_FEATURE_16BPP)) {

			dev_err(dsi->dev, "Unsupported format 0x%04x\n",

				device->format);

			return -EINVAL;

		}

		break;

	default:

		dev_err(dsi->dev, "Unsupported format 0x%04x\n", device->format);

		return -EINVAL;