On Fri, 28 Jul 2023 at 04:26, Paloma Arellano
<quic_parellan@xxxxxxxxxxx> wrote:
Enable display compression (DSC v1.2) and CMD mode for 1080x2400
Visionox
VTDR6130 AMOLED DSI panel. In addition, this patch will set the default
to command mode with DSC enabled.
Note: This patch has only been validated DSC over command mode as DSC
over
video mode has never been validated for the MSM driver before.
Depends on: "Add prepare_prev_first flag to Visionox VTDR6130" [1]
Changes since v1:
- Changed from email address
[1] https://patchwork.freedesktop.org/series/121337/
Suggested-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
Signed-off-by: Paloma Arellano <quic_parellan@xxxxxxxxxxx>
---
.../gpu/drm/panel/panel-visionox-vtdr6130.c | 77 ++++++++++++++++++-
1 file changed, 73 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
index e1363e128e7e..5658d39a3a6b 100644
--- a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
+++ b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
@@ -9,6 +9,7 @@
#include <linux/of.h>
#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
@@ -20,7 +21,8 @@ struct visionox_vtdr6130 {
struct mipi_dsi_device *dsi;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[3];
- bool prepared;
+ bool prepared, enabled;
+ bool video_mode;
};
static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct
drm_panel *panel)
@@ -50,12 +52,18 @@ static int visionox_vtdr6130_on(struct
visionox_vtdr6130 *ctx)
if (ret)
return ret;
+ mipi_dsi_dcs_write_seq(dsi, 0x03, 0x01);
mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
0x20);
mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
0x00, 0x00);
mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09);
mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01);
mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00);
- mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
+
+ if (ctx->video_mode)
+ mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
+ else
+ mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x02);
+
mipi_dsi_dcs_write_seq(dsi, 0x70,
0x12, 0x00, 0x00, 0xab, 0x30, 0x80,
0x09, 0x60, 0x04,
0x38, 0x00, 0x28, 0x02, 0x1c, 0x02,
0x1c, 0x02, 0x00,
@@ -214,6 +222,42 @@ static const struct drm_display_mode
visionox_vtdr6130_mode = {
.height_mm = 157,
};
+static int visionox_vtdr6130_enable(struct drm_panel *panel)
+{
+ struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct drm_dsc_picture_parameter_set pps;
+ int ret;
+
+ if (ctx->enabled)
+ return 0;
+
+ if (!dsi->dsc) {
+ dev_err(&dsi->dev, "DSC not attached to DSI\n");
+ return -ENODEV;
+ }
The error message is misleading. Also, if you don't want to enable DSC
for the video mode, this will break.
+
+ drm_dsc_pps_payload_pack(&pps, dsi->dsc);
+ ret = mipi_dsi_picture_parameter_set(dsi, &pps);
+ if (ret) {
+ dev_err(&dsi->dev, "Failed to set PPS\n");
+ return ret;
+ }
+
+ ctx->enabled = true;
Do we need this refcount just for PPS upload? What will happen if PPS
is uploaded several times?
+
+ return 0;
+}
+
+static int visionox_vtdr6130_disable(struct drm_panel *panel)
+{
+ struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
+
+ ctx->enabled = false;
+
+ return 0;
+}
+
static int visionox_vtdr6130_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
@@ -237,6 +281,8 @@ static const struct drm_panel_funcs
visionox_vtdr6130_panel_funcs = {
.prepare = visionox_vtdr6130_prepare,
.unprepare = visionox_vtdr6130_unprepare,
.get_modes = visionox_vtdr6130_get_modes,
+ .enable = visionox_vtdr6130_enable,
+ .disable = visionox_vtdr6130_disable,
};
static int visionox_vtdr6130_bl_update_status(struct
backlight_device *bl)
@@ -269,11 +315,31 @@ static int visionox_vtdr6130_probe(struct
mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct visionox_vtdr6130 *ctx;
+ struct drm_dsc_config *dsc;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
+
+ ctx->video_mode = of_property_read_bool(dev->of_node,
"enforce-video-mode");
Please also add a DT bindings patch.
+
+ dsc = devm_kzalloc(dev, sizeof(*dsc), GFP_KERNEL);
+ if (!dsc)
+ return -ENOMEM;
You can add struct drm_dsc_config to struct visionox_vtdr6130 instead
of allocating it.
+
+ /* Set DSC params */
+ dsc->dsc_version_major = 0x1;
+ dsc->dsc_version_minor = 0x2;
+
+ dsc->slice_height = 40;
+ dsc->slice_width = 540;
+ dsc->slice_count = 2;
+ dsc->bits_per_component = 8;
+ dsc->bits_per_pixel = 8 << 4;
+ dsc->block_pred_enable = true;
+
+ dsi->dsc = dsc;
Only in command mode?
