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Message-ID: <20240617105311.1587489-8-a-bhatia1@ti.com>
Date: Mon, 17 Jun 2024 16:23:08 +0530
From: Aradhya Bhatia <a-bhatia1@...com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Tomi Valkeinen
<tomi.valkeinen@...asonboard.com>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman
<jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten
Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard
<mripard@...nel.org>, Jyri Sarha <jyri.sarha@....fi>,
Thomas Zimmermann
<tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Daniel Vetter
<daniel@...ll.ch>
CC: DRI Development List <dri-devel@...ts.freedesktop.org>,
Linux Kernel List
<linux-kernel@...r.kernel.org>,
Dominik Haller <d.haller@...tec.de>, Sam
Ravnborg <sam@...nborg.org>,
Thierry Reding <treding@...dia.com>,
Kieran
Bingham <kieran.bingham+renesas@...asonboard.com>,
Nishanth Menon
<nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
Praneeth Bajjuri
<praneeth@...com>, Udit Kumar <u-kumar1@...com>,
Devarsh Thakkar
<devarsht@...com>,
Jayesh Choudhary <j-choudhary@...com>, Jai Luthra
<j-luthra@...com>,
Aradhya Bhatia <a-bhatia1@...com>
Subject: [PATCH v3 07/10] drm/mipi-dsi: Add helper to find input format
Add a helper API that can be used by the DSI hosts to find the required
input bus format for the given output dsi pixel format.
Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
---
drivers/gpu/drm/drm_mipi_dsi.c | 37 ++++++++++++++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 1 +
2 files changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 795001bb7ff1..70ca6678fec2 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -36,6 +36,8 @@
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_print.h>
+#include <linux/media-bus-format.h>
+
#include <video/mipi_display.h>
/**
@@ -810,6 +812,41 @@ ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
}
EXPORT_SYMBOL(mipi_dsi_generic_read);
+/**
+ * drm_mipi_dsi_get_input_bus_fmt() - Get the required MEDIA_BUS_FMT_* based
+ * input pixel format for a given DSI output
+ * pixel format
+ * @dsi_format: pixel format that a DSI host needs to output
+ *
+ * Various DSI hosts can use this function during their
+ * &drm_bridge_funcs.atomic_get_input_bus_fmts operation to ascertain
+ * the MEDIA_BUS_FMT_* pixel format required as input.
+ *
+ * RETURNS:
+ * a 32-bit MEDIA_BUS_FMT_* value on success or 0 in case of failure.
+ */
+u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format)
+{
+ switch (dsi_format) {
+ case MIPI_DSI_FMT_RGB888:
+ return MEDIA_BUS_FMT_RGB888_1X24;
+
+ case MIPI_DSI_FMT_RGB666:
+ return MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
+
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ return MEDIA_BUS_FMT_RGB666_1X18;
+
+ case MIPI_DSI_FMT_RGB565:
+ return MEDIA_BUS_FMT_RGB565_1X16;
+
+ default:
+ /* Unsupported DSI Format */
+ return 0;
+ }
+}
+EXPORT_SYMBOL(drm_mipi_dsi_get_input_bus_fmt);
+
/**
* mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload
* @dsi: DSI peripheral device
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 82b1cc434ea3..12ed7f51fe69 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -258,6 +258,7 @@ ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
size_t size);
ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
size_t num_params, void *data, size_t size);
+u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format);
/**
* enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
--
2.34.1
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