[PATCH] drm/panel: move some dsi commands from unprepare to disable

[Caleb Connolly <caleb.connolly@linaro.org>]

The commit 007ac0262b0d ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")
breaks panels which send DSI commands in their .unprepare callbacks.
Migrate to using .disable for that for some SDM845 panels.

Co-developed-by: Joel Selvaraj <joelselvaraj.oss@gmail.com>
Signed-off-by: Joel Selvaraj <joelselvaraj.oss@gmail.com>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
---
base-commit: 858fd168a95c5b9669aac8db6c14a9aeab446375

// Caleb (they/them)
---
 drivers/gpu/drm/panel/panel-ebbg-ft8719.c      | 18 +++++++-----------
 drivers/gpu/drm/panel/panel-novatek-nt36672a.c | 11 ++++++++++-
 drivers/gpu/drm/panel/panel-visionox-rm69299.c | 11 ++++++++++-
 3 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
index e85d63a176d0..b40a27558e7c 100644
--- a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
+++ b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
@@ -87,22 +87,22 @@ static int ebbg_ft8719_on(struct ebbg_ft8719 *ctx)
 	return 0;
 }
 
-static int ebbg_ft8719_off(struct ebbg_ft8719 *ctx)
+static int ebbg_ft8719_disable(struct drm_panel *panel)
 {
-	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
+	struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
+	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
-	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_off(dsi);
+	ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
 	if (ret < 0) {
 		dev_err(dev, "Failed to set display off: %d\n", ret);
 		return ret;
 	}
 	usleep_range(10000, 11000);
 
-	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+	ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
 	if (ret < 0) {
 		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
 		return ret;
@@ -137,13 +137,8 @@ static int ebbg_ft8719_prepare(struct drm_panel *panel)
 static int ebbg_ft8719_unprepare(struct drm_panel *panel)
 {
 	struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
-	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
-	ret = ebbg_ft8719_off(ctx);
-	if (ret < 0)
-		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
-
 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 
 	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
@@ -188,6 +183,7 @@ static int ebbg_ft8719_get_modes(struct drm_panel *panel,
 
 static const struct drm_panel_funcs ebbg_ft8719_panel_funcs = {
 	.prepare = ebbg_ft8719_prepare,
+	.disable = ebbg_ft8719_disable,
 	.unprepare = ebbg_ft8719_unprepare,
 	.get_modes = ebbg_ft8719_get_modes,
 };
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
index 73bcffa1e0c1..2e1a87001479 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
@@ -115,7 +115,7 @@ static int nt36672a_panel_power_off(struct drm_panel *panel)
 	return ret;
 }
 
-static int nt36672a_panel_unprepare(struct drm_panel *panel)
+static int nt36672a_panel_disable(struct drm_panel *panel)
 {
 	struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
 	int ret;
@@ -144,6 +144,14 @@ static int nt36672a_panel_unprepare(struct drm_panel *panel)
 	/* 0x3C = 60ms delay */
 	msleep(60);
 
+	return ret;
+}
+
+static int nt36672a_panel_unprepare(struct drm_panel *panel)
+{
+	struct nt36672a_panel *pinfo = to_nt36672a_panel(panel);
+	int ret;
+
 	ret = nt36672a_panel_power_off(panel);
 	if (ret < 0)
 		dev_err(panel->dev, "power_off failed ret = %d\n", ret);
@@ -255,6 +263,7 @@ static int nt36672a_panel_get_modes(struct drm_panel *panel,
 }
 
 static const struct drm_panel_funcs panel_funcs = {
+	.disable = nt36672a_panel_disable,
 	.unprepare = nt36672a_panel_unprepare,
 	.prepare = nt36672a_panel_prepare,
 	.get_modes = nt36672a_panel_get_modes,
diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
index ec228c269146..9dc17afbe540 100644
--- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -59,7 +59,7 @@ static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
 	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 }
 
-static int visionox_rm69299_unprepare(struct drm_panel *panel)
+static int visionox_rm69299_disable(struct drm_panel *panel)
 {
 	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
 	int ret;
@@ -78,6 +78,14 @@ static int visionox_rm69299_unprepare(struct drm_panel *panel)
 		dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);
 	}
 
+	return ret;
+}
+
+static int visionox_rm69299_unprepare(struct drm_panel *panel)
+{
+	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+	int ret;
+
 	ret = visionox_rm69299_power_off(ctx);
 
 	ctx->prepared = false;
@@ -184,6 +192,7 @@ static int visionox_rm69299_get_modes(struct drm_panel *panel,
 }
 
 static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
+	.disable = visionox_rm69299_disable,
 	.unprepare = visionox_rm69299_unprepare,
 	.prepare = visionox_rm69299_prepare,
 	.get_modes = visionox_rm69299_get_modes,