[PATCH v4 3/3] drm/display: split DSC helpers from DP helpers

[Dmitry Baryshkov]

Currently the DRM DSC functions are selected by the
DRM_DISPLAY_DP_HELPER Kconfig symbol. This is not optimal, since the DSI
code (both panel and host drivers) end up selecting the seemingly
irrelevant DP helpers. Split the DSC code to be guarded by the separate
DRM_DISPLAY_DSC_HELPER Kconfig symbol.

Reviewed-by: Jessica Zhang <quic_jesszhan at quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/amd/amdgpu/Kconfig | 1 +
 drivers/gpu/drm/display/Kconfig    | 6 ++++++
 drivers/gpu/drm/display/Makefile   | 3 ++-
 drivers/gpu/drm/i915/Kconfig       | 1 +
 drivers/gpu/drm/msm/Kconfig        | 1 +
 drivers/gpu/drm/panel/Kconfig      | 6 +++---
 6 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig
index 4232ab27f990..5933ca8c6b96 100644
--- a/drivers/gpu/drm/amd/amdgpu/Kconfig
+++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
@@ -6,6 +6,7 @@ config DRM_AMDGPU
 	depends on !UML
 	select FW_LOADER
 	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_DISPLAY_HDMI_HELPER
 	select DRM_DISPLAY_HDCP_HELPER
 	select DRM_DISPLAY_HELPER
diff --git a/drivers/gpu/drm/display/Kconfig b/drivers/gpu/drm/display/Kconfig
index 864a6488bfdf..f524cf95dec3 100644
--- a/drivers/gpu/drm/display/Kconfig
+++ b/drivers/gpu/drm/display/Kconfig
@@ -59,6 +59,12 @@ config DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 
 	  If in doubt, say "N".
 
+config DRM_DISPLAY_DSC_HELPER
+	bool
+	depends on DRM_DISPLAY_HELPER
+	help
+	  DRM display helpers for VESA DSC (used by DSI and DisplayPort).
+
 config DRM_DISPLAY_HDCP_HELPER
 	bool
 	depends on DRM_DISPLAY_HELPER
diff --git a/drivers/gpu/drm/display/Makefile b/drivers/gpu/drm/display/Makefile
index 17d2cc73ff56..2ec71e15c3cb 100644
--- a/drivers/gpu/drm/display/Makefile
+++ b/drivers/gpu/drm/display/Makefile
@@ -6,7 +6,8 @@ drm_display_helper-y := drm_display_helper_mod.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += \
 	drm_dp_dual_mode_helper.o \
 	drm_dp_helper.o \
-	drm_dp_mst_topology.o \
+	drm_dp_mst_topology.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_DSC_HELPER) += \
 	drm_dsc_helper.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_TUNNEL) += \
 	drm_dp_tunnel.o
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 5932024f8f95..117b84260b1c 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -11,6 +11,7 @@ config DRM_I915
 	select SHMEM
 	select TMPFS
 	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_DISPLAY_HDCP_HELPER
 	select DRM_DISPLAY_HDMI_HELPER
 	select DRM_DISPLAY_HELPER
diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
index 1931ecf73e32..6dcd26180611 100644
--- a/drivers/gpu/drm/msm/Kconfig
+++ b/drivers/gpu/drm/msm/Kconfig
@@ -111,6 +111,7 @@ config DRM_MSM_DSI
 	depends on DRM_MSM
 	select DRM_PANEL
 	select DRM_MIPI_DSI
+	select DRM_DISPLAY_DSC_HELPER
 	default y
 	help
 	  Choose this option if you have a need for MIPI DSI connector
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 2ae0eb0638f3..3e3f63479544 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -340,7 +340,7 @@ config DRM_PANEL_LG_SW43408
 	depends on OF
 	depends on DRM_MIPI_DSI
 	depends on BACKLIGHT_CLASS_DEVICE
-	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_DISPLAY_HELPER
 	help
 	  Say Y here if you want to enable support for LG sw43408 panel.
@@ -549,7 +549,7 @@ config DRM_PANEL_RAYDIUM_RM692E5
 	depends on OF
 	depends on DRM_MIPI_DSI
 	depends on BACKLIGHT_CLASS_DEVICE
-	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_DISPLAY_HELPER
 	help
 	  Say Y here if you want to enable support for Raydium RM692E5-based
@@ -907,7 +907,7 @@ config DRM_PANEL_VISIONOX_R66451
 	depends on OF
 	depends on DRM_MIPI_DSI
 	depends on BACKLIGHT_CLASS_DEVICE
-	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_DISPLAY_HELPER
 	help
 	  Say Y here if you want to enable support for Visionox

-- 
2.39.2