[PATCH v9 7/8] drm: atmel-hlcdc: add support for DSI output formats

Manikandan Muralidharan
2024-03-01T05:27:07Z

Add support for the following DPI mode if the encoder type
is DSI as per the XLCDC IP datasheet:
- 16BPPCFG1
- 16BPPCFG2
- 16BPPCFG3
- 18BPPCFG1
- 18BPPCFG2
- 24BPP

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
[durai.manickamkr@microchip.com: update output format using is_xlcdc flag]
Signed-off-by: Durai Manickam KR <durai.manickamkr@microchip.com>
---
.../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 70 +++++++++++++++++--
1 file changed, 64 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index fdd3a6bc0f79..0f7ffb3ced20 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -301,11 +301,60 @@ static void atmel_hlcdc_crtc_atomic_enable(struct drm_crtc *c,

}

-#define ATMEL_HLCDC_RGB444_OUTPUT BIT(0)
-#define ATMEL_HLCDC_RGB565_OUTPUT BIT(1)
-#define ATMEL_HLCDC_RGB666_OUTPUT BIT(2)
-#define ATMEL_HLCDC_RGB888_OUTPUT BIT(3)
-#define ATMEL_HLCDC_OUTPUT_MODE_MASK GENMASK(3, 0)
+#define ATMEL_HLCDC_RGB444_OUTPUT BIT(0)
+#define ATMEL_HLCDC_RGB565_OUTPUT BIT(1)
+#define ATMEL_HLCDC_RGB666_OUTPUT BIT(2)
+#define ATMEL_HLCDC_RGB888_OUTPUT BIT(3)
+#define ATMEL_HLCDC_DPI_RGB565C1_OUTPUT BIT(4)
+#define ATMEL_HLCDC_DPI_RGB565C2_OUTPUT BIT(5)
+#define ATMEL_HLCDC_DPI_RGB565C3_OUTPUT BIT(6)
+#define ATMEL_HLCDC_DPI_RGB666C1_OUTPUT BIT(7)
+#define ATMEL_HLCDC_DPI_RGB666C2_OUTPUT BIT(8)
+#define ATMEL_HLCDC_DPI_RGB888_OUTPUT BIT(9)
+#define ATMEL_HLCDC_OUTPUT_MODE_MASK GENMASK(3, 0)
+#define ATMEL_XLCDC_OUTPUT_MODE_MASK GENMASK(9, 0)
+
+static int atmel_xlcdc_connector_output_dsi(struct drm_encoder *encoder,
+ struct drm_display_info *info)
+{
+ int j;
+ unsigned int supported_fmts = 0;
+
+ switch (atmel_hlcdc_encoder_get_bus_fmt(encoder)) {
+ case 0:
+ break;
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ return ATMEL_HLCDC_DPI_RGB565C1_OUTPUT;
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ return ATMEL_HLCDC_DPI_RGB666C1_OUTPUT;
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ return ATMEL_HLCDC_DPI_RGB666C2_OUTPUT;
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ return ATMEL_HLCDC_DPI_RGB888_OUTPUT;
+ default:
+ return -EINVAL;
+ }
+
+ for (j = 0; j < info->num_bus_formats; j++) {
+ switch (info->bus_formats[j]) {
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ supported_fmts |= ATMEL_HLCDC_DPI_RGB565C1_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ supported_fmts |= ATMEL_HLCDC_DPI_RGB666C1_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ supported_fmts |= ATMEL_HLCDC_DPI_RGB666C2_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ supported_fmts |= ATMEL_HLCDC_DPI_RGB888_OUTPUT;
+ break;
+ default:
+ break;
+ }
+ }
+ return supported_fmts;
+}

static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)
{
@@ -318,6 +367,13 @@ static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)
encoder = state->best_encoder;
if (!encoder)
encoder = connector->encoder;
+ /*
+ * atmel-hlcdc to support DSI formats with DSI video pipeline
+ * when DRM_MODE_ENCODER_DSI type is set by
+ * connector driver component.
+ */
+ if (encoder->encoder_type == DRM_MODE_ENCODER_DSI)
+ return atmel_xlcdc_connector_output_dsi(encoder, info);

switch (atmel_hlcdc_encoder_get_bus_fmt(encoder)) {
case 0:
@@ -358,7 +414,7 @@ static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)

static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
{
- unsigned int output_fmts = ATMEL_HLCDC_OUTPUT_MODE_MASK;
+ unsigned int output_fmts;
struct atmel_hlcdc_crtc_state *hstate;
struct drm_connector_state *cstate;
struct drm_connector *connector;
@@ -366,6 +422,8 @@ static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
int i;

crtc = drm_crtc_to_atmel_hlcdc_crtc(state->crtc);
+ output_fmts = crtc->dc->desc->is_xlcdc ? ATMEL_XLCDC_OUTPUT_MODE_MASK :
+ ATMEL_HLCDC_OUTPUT_MODE_MASK;

for_each_new_connector_in_state(state->state, connector, cstate, i) {
unsigned int supported_fmts = 0;
--
2.25.1