drm/sprd: add Unisoc's drm mipi dsi&dphy driver

Adds dsi host controller support for the Unisoc's display subsystem.
Adds dsi phy support for the Unisoc's display subsystem.
Only MIPI DSI Displays supported, DP/TV/HMDI will be support
in the feature.

v1:
  - Remove dphy and dsi graph binding, merge the dphy driver into the dsi.

v2:
  - Use drm_xxx to replace all DRM_XXX.
  - Use kzalloc to replace devm_kzalloc for sprd_dsi structure init.

v4:
  - Use drmm_helpers to allocate encoder.
  - Move allocate encoder and connector to bind function.

v5:
  - Drop the dsi ip file prefix.
  - Fix the checkpatch warnings.
  - Add Signed-off-by for dsi&dphy patch.
  - Use the mode_flags of mipi_dsi_device to setup crtc DPI and EDPI mode.

v6:
  - Redesign the way to access the dsi register.
  - Reduce the dsi_context member variables.

v7:
  - Fix codeing style issue by checkpatch.
  - Drop the pll registers structure define.
  - Use bridge API instead of drm panel API.
  - Register mipi_dsi_host on probe phase;
  - Remove some unused function.

v8:
  - Fix missing signed-off-by.
  - Move component_add to dsi_host.attach callback.

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211207142717.30296-7-kevin3.tang@gmail.com

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
index 1d10d09987cc..06a3414ee43a 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.c
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -25,6 +25,7 @@
 
 #include "sprd_drm.h"
 #include "sprd_dpu.h"
+#include "sprd_dsi.h"
 
 /* Global control registers */
 #define REG_DPU_CTRL	0x04
@@ -618,9 +619,21 @@ static void sprd_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
 	struct sprd_dpu *dpu = to_sprd_crtc(crtc);
 	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+	struct drm_encoder *encoder;
+	struct sprd_dsi *dsi;
 
 	drm_display_mode_to_videomode(mode, &dpu->ctx.vm);
 
+	drm_for_each_encoder_mask(encoder, crtc->dev,
+				  crtc->state->encoder_mask) {
+		dsi = encoder_to_dsi(encoder);
+
+		if (dsi->slave->mode_flags & MIPI_DSI_MODE_VIDEO)
+			dpu->ctx.if_type = SPRD_DPU_IF_DPI;
+		else
+			dpu->ctx.if_type = SPRD_DPU_IF_EDPI;
+	}
+
 	sprd_dpi_init(dpu);
 }