In order to enable Source Split in HW, we need to add/modify
a few LM register configurations:
- Configure the LM width to be half the mode width, so that
each LM manages one half of the scanout.
- Tell the 'right' LM that it is configured to be the 'right'
LM in source split mode.
- Since we now have 2 places where REG_MDP5_LM_BLEND_COLOR_OUT is
configured, do a read-update-store for the register instead of
directly writing a value to it.
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c | 39 ++++++++++++++++++++++++++------
1 file changed, 32 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
index 5bffef6ec9dc..4b3bc5fc1006 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
@@ -231,6 +231,7 @@ static void blend_setup(struct drm_crtc *crtc)
int i, plane_cnt = 0;
bool bg_alpha_enabled = false;
u32 mixer_op_mode = 0;
+ u32 val;
#define blender(stage) ((stage) - STAGE0)
hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
@@ -330,10 +331,14 @@ static void blend_setup(struct drm_crtc *crtc)
}
}
- mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(lm), mixer_op_mode);
- if (r_mixer)
+ val = mdp5_read(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(lm));
+ mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(lm),
+ val | mixer_op_mode);
+ if (r_mixer) {
+ val = mdp5_read(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(r_lm));
mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(r_lm),
- mixer_op_mode);
+ val | mixer_op_mode);
+ }
mdp5_ctl_blend(ctl, pipeline, stage, r_stage, plane_cnt,
ctl_blend_flags);
@@ -349,6 +354,7 @@ static void mdp5_crtc_mode_set_nofb(struct drm_crtc *crtc)
struct mdp5_hw_mixer *mixer = mdp5_cstate->pipeline.mixer;
struct mdp5_hw_mixer *r_mixer = mdp5_cstate->pipeline.r_mixer;
uint32_t lm = mixer->lm;
+ u32 mixer_width, val;
unsigned long flags;
struct drm_display_mode *mode;
@@ -366,14 +372,33 @@ static void mdp5_crtc_mode_set_nofb(struct drm_crtc *crtc)
mode->vsync_end, mode->vtotal,
mode->type, mode->flags);
+ mixer_width = mode->hdisplay;
+ if (r_mixer)
+ mixer_width /= 2;
+
spin_lock_irqsave(&mdp5_crtc->lm_lock, flags);
mdp5_write(mdp5_kms, REG_MDP5_LM_OUT_SIZE(lm),
- MDP5_LM_OUT_SIZE_WIDTH(mode->hdisplay) |
+ MDP5_LM_OUT_SIZE_WIDTH(mixer_width) |
MDP5_LM_OUT_SIZE_HEIGHT(mode->vdisplay));
- if (r_mixer)
- mdp5_write(mdp5_kms, REG_MDP5_LM_OUT_SIZE(r_mixer->lm),
- MDP5_LM_OUT_SIZE_WIDTH(mode->hdisplay) |
+
+ /* Assign mixer to LEFT side in source split mode */
+ val = mdp5_read(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(lm));
+ val &= ~MDP5_LM_BLEND_COLOR_OUT_SPLIT_LEFT_RIGHT;
+ mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(lm), val);
+
+ if (r_mixer) {
+ u32 r_lm = r_mixer->lm;
+
+ mdp5_write(mdp5_kms, REG_MDP5_LM_OUT_SIZE(r_lm),
+ MDP5_LM_OUT_SIZE_WIDTH(mixer_width) |
MDP5_LM_OUT_SIZE_HEIGHT(mode->vdisplay));
+
+ /* Assign mixer to RIGHT side in source split mode */
+ val = mdp5_read(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(r_lm));
+ val |= MDP5_LM_BLEND_COLOR_OUT_SPLIT_LEFT_RIGHT;
+ mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(r_lm), val);
+ }
+
spin_unlock_irqrestore(&mdp5_crtc->lm_lock, flags);
}
--
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