drm/msm/mdp5: use drm_plane_state for pixel blend mode

Use drm_plane_state's 'pixel_blend_mode' field rather than using
'premultiplied' field to mdp5_plane_state.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210525131316.3117809-4-dmitry.baryshkov@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c

@@ -301,7 +301,8 @@ static void blend_setup(struct drm_crtc *crtc)
 
 		DBG("Stage %d fg_alpha %x bg_alpha %x", i, fg_alpha, bg_alpha);
 
-		if (format->alpha_enable && pstates[i]->premultiplied) {
+		if (format->alpha_enable &&
+		    pstates[i]->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI) {
 			blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
 				MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
 			if (fg_alpha != 0xff) {
@@ -312,7 +313,8 @@ static void blend_setup(struct drm_crtc *crtc)
 			} else {
 				blend_op |= MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA;
 			}
-		} else if (format->alpha_enable) {
+		} else if (format->alpha_enable &&
+			   pstates[i]->base.pixel_blend_mode == DRM_MODE_BLEND_COVERAGE) {
 			blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_PIXEL) |
 				MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
 			if (fg_alpha != 0xff) {

drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h

@@ -99,7 +99,6 @@ struct mdp5_plane_state {
 	struct mdp5_hw_pipe *r_hwpipe;	/* right hwpipe */
 
 	/* aligned with property */
-	uint8_t premultiplied;
 	uint8_t zpos;
 
 	/* assigned by crtc blender */

drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c

@@ -166,7 +166,7 @@ mdp5_plane_atomic_print_state(struct drm_printer *p,
 		drm_printf(p, "\tright-hwpipe=%s\n",
 			   pstate->r_hwpipe ? pstate->r_hwpipe->name :
 					      "(null)");
-	drm_printf(p, "\tpremultiplied=%u\n", pstate->premultiplied);
+	drm_printf(p, "\tblend_mode=%u\n", pstate->base.pixel_blend_mode);
 	drm_printf(p, "\tzpos=%u\n", pstate->zpos);
 	drm_printf(p, "\talpha=%u\n", pstate->base.alpha);
 	drm_printf(p, "\tstage=%s\n", stage2name(pstate->stage));
@@ -182,9 +182,6 @@ static void mdp5_plane_reset(struct drm_plane *plane)
 	kfree(to_mdp5_plane_state(plane->state));
 	mdp5_state = kzalloc(sizeof(*mdp5_state), GFP_KERNEL);
 
-	/* assign default blend parameters */
-	mdp5_state->premultiplied = 0;
-
 	if (plane->type == DRM_PLANE_TYPE_PRIMARY)
 		mdp5_state->zpos = STAGE_BASE;
 	else