drm: Add acquire ctx to ->gamma_set hook

Atomic helpers really want this instead of the hacked-up legacy
backoff trick, which unfortunately prevents drivers from using their
own private drm_modeset_locks.

Aside: There's a few atomic drivers (nv50, vc4, soon vmwgfx) which
don't yet use the new atomic color mgmt/gamma table stuff. Would be
nice if they could switch over and just hook up
drm_atomic_helper_legacy_gamma_set() instead.

Cc: Dave Airlie <[e-mail]>
Cc: Alex Deucher <[e-mail]>
Cc: Christian König <[e-mail]>
Cc: Gerd Hoffmann <[e-mail]>
Cc: Ben Skeggs <[e-mail]>
Cc: Sinclair Yeh <[e-mail]>
Cc: Thomas Hellstrom <[e-mail]>
Cc: Eric Anholt <[e-mail]>
Reviewed-by: Maarten Lankhorst <[e-mail]>
Acked-by: Alex Deucher <[e-mail]>
Reviewed-by: Sinclair Yeh <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

···
 }
 
 static int dce_v10_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				    u16 *blue, uint32_t size)
+				    u16 *blue, uint32_t size,
+				    struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	int i;

drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

···
 }
 
 static int dce_v11_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				    u16 *blue, uint32_t size)
+				    u16 *blue, uint32_t size,
+				    struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	int i;

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

···
 }
 
 static int dce_v6_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				   u16 *blue, uint32_t size)
+				   u16 *blue, uint32_t size,
+				   struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	int i;

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

···
 }
 
 static int dce_v8_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				   u16 *blue, uint32_t size)
+				   u16 *blue, uint32_t size,
+				   struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	int i;

drivers/gpu/drm/amd/amdgpu/dce_virtual.c

···
 }
 
 static int dce_virtual_crtc_gamma_set(struct drm_crtc *crtc, u16 *red,
-				      u16 *green, u16 *blue, uint32_t size)
+				      u16 *green, u16 *blue, uint32_t size,
+				      struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	int i;

drivers/gpu/drm/ast/ast_mode.c

···
 }
 
 static int ast_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-			      u16 *blue, uint32_t size)
+			      u16 *blue, uint32_t size,
+			      struct drm_modeset_acquire_ctx *ctx)
 {
 	struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 	int i;

drivers/gpu/drm/cirrus/cirrus_mode.c

···
  * but it's a requirement that we provide the function
  */
 static int cirrus_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				 u16 *blue, uint32_t size)
+				 u16 *blue, uint32_t size,
+				 struct drm_modeset_acquire_ctx *ctx)
 {
 	struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc);
 	int i;

drivers/gpu/drm/drm_atomic_helper.c

···
  * @green: green correction table
  * @blue: green correction table
  * @size: size of the tables
+ * @ctx: lock acquire context
  *
  * Implements support for legacy gamma correction table for drivers
  * that support color management through the DEGAMMA_LUT/GAMMA_LUT
···
  */
 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
 				       u16 *red, u16 *green, u16 *blue,
-				       uint32_t size)
+				       uint32_t size,
+				       struct drm_modeset_acquire_ctx *ctx)
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_mode_config *config = &dev->mode_config;

drivers/gpu/drm/drm_color_mgmt.c

···
 		goto out;
 	}
 
-	ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
+	ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base,
+				     crtc->gamma_size, &ctx);
 
 out:
 	if (ret == -EDEADLK) {

drivers/gpu/drm/drm_fb_helper.c

···
 	g_base = r_base + crtc->gamma_size;
 	b_base = g_base + crtc->gamma_size;
 
-	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
+	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base,
+			       crtc->gamma_size, NULL);
 }
 
 /**

drivers/gpu/drm/gma500/gma_display.c

···
 }
 
 int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
-		       u32 size)
+		       u32 size,
+		       struct drm_modeset_acquire_ctx *ctx)
 {
 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 	int i;

drivers/gpu/drm/gma500/gma_display.h

···
 extern int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y);
 extern void gma_crtc_load_lut(struct drm_crtc *crtc);
 extern int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-			      u16 *blue, u32 size);
+			      u16 *blue, u32 size,
+			      struct drm_modeset_acquire_ctx *ctx);
 extern void gma_crtc_dpms(struct drm_crtc *crtc, int mode);
 extern void gma_crtc_prepare(struct drm_crtc *crtc);
 extern void gma_crtc_commit(struct drm_crtc *crtc);

drivers/gpu/drm/mgag200/mgag200_mode.c

···
  * but it's a requirement that we provide the function
  */
 static int mga_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-			      u16 *blue, uint32_t size)
+			      u16 *blue, uint32_t size,
+			      struct drm_modeset_acquire_ctx *ctx)
 {
 	struct mga_crtc *mga_crtc = to_mga_crtc(crtc);
 	int i;

drivers/gpu/drm/nouveau/dispnv04/crtc.c

···
 
 static int
 nv_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
-		  uint32_t size)
+		  uint32_t size,
+		  struct drm_modeset_acquire_ctx *ctx)
 {
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 	int i;

drivers/gpu/drm/nouveau/nv50_display.c

···
 
 static int
 nv50_head_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
-		    uint32_t size)
+		    uint32_t size,
+		    struct drm_modeset_acquire_ctx *ctx)
 {
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 	u32 i;

drivers/gpu/drm/radeon/radeon_display.c

···
 }
 
 static int radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
-				 u16 *blue, uint32_t size)
+				 u16 *blue, uint32_t size,
+				 struct drm_modeset_acquire_ctx *ctx)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	int i;

drivers/gpu/drm/vc4/vc4_crtc.c

···
 
 static int
 vc4_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
-		   uint32_t size)
+		   uint32_t size,
+		   struct drm_modeset_acquire_ctx *ctx)
 {
 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
 	u32 i;

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

···
 
 int vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
 			  u16 *r, u16 *g, u16 *b,
-			  uint32_t size)
+			  uint32_t size,
+			  struct drm_modeset_acquire_ctx *ctx)
 {
 	struct vmw_private *dev_priv = vmw_priv(crtc->dev);
 	int i;

drivers/gpu/drm/vmwgfx/vmwgfx_kms.h

···
 void vmw_du_crtc_restore(struct drm_crtc *crtc);
 int vmw_du_crtc_gamma_set(struct drm_crtc *crtc,
 			   u16 *r, u16 *g, u16 *b,
-			   uint32_t size);
+			   uint32_t size,
+			   struct drm_modeset_acquire_ctx *ctx);
 int vmw_du_crtc_cursor_set2(struct drm_crtc *crtc, struct drm_file *file_priv,
 			    uint32_t handle, uint32_t width, uint32_t height,
 			    int32_t hot_x, int32_t hot_y);

include/drm/drm_atomic_helper.h

···
 					  struct drm_connector_state *state);
 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
 				       u16 *red, u16 *green, u16 *blue,
-				       uint32_t size);
+				       uint32_t size,
+				       struct drm_modeset_acquire_ctx *ctx);
 
 /**
  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC

include/drm/drm_crtc.h

···
 	 * hooks.
 	 */
 	int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
-			 uint32_t size);
+			 uint32_t size,
+			 struct drm_modeset_acquire_ctx *ctx);
 
 	/**
 	 * @destroy: