drm/msm/mdp4: add YUV format support

The patch add support for YUV frame format
for MDP4 platform.

Signed-off-by: Beeresh Gopal <gbeeresh@codeaurora.org>
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 95 insertions, 9 deletions

diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
index 1e5ebe83647d..cde25009203a 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
@@ -17,6 +17,8 @@
 
 #include "mdp4_kms.h"
 
+#define DOWN_SCALE_MAX  8
+#define UP_SCALE_MAX    8
 
 struct mdp4_plane {
         struct drm_plane base;
@@ -136,10 +138,6 @@ static void mdp4_plane_set_scanout(struct drm_plane *plane,
         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
         struct mdp4_kms *mdp4_kms = get_kms(plane);
         enum mdp4_pipe pipe = mdp4_plane->pipe;
-        uint32_t iova = msm_framebuffer_iova(fb, mdp4_kms->id, 0);
-
-        DBG("%s: set_scanout: %08x (%u)", mdp4_plane->name,
-                        iova, fb->pitches[0]);
 
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_A(pipe),
                         MDP4_PIPE_SRC_STRIDE_A_P0(fb->pitches[0]) |
@@ -149,11 +147,45 @@ static void mdp4_plane_set_scanout(struct drm_plane *plane,
                         MDP4_PIPE_SRC_STRIDE_B_P2(fb->pitches[2]) |
                         MDP4_PIPE_SRC_STRIDE_B_P3(fb->pitches[3]));
 
-        mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP0_BASE(pipe), iova);
+        mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP0_BASE(pipe),
+                        msm_framebuffer_iova(fb, mdp4_kms->id, 0));
+        mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP1_BASE(pipe),
+                        msm_framebuffer_iova(fb, mdp4_kms->id, 1));
+        mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP2_BASE(pipe),
+                        msm_framebuffer_iova(fb, mdp4_kms->id, 2));
+        mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP3_BASE(pipe),
+                        msm_framebuffer_iova(fb, mdp4_kms->id, 3));
 
         plane->fb = fb;
 }
 
+static void mdp4_write_csc_config(struct mdp4_kms *mdp4_kms,
+                enum mdp4_pipe pipe, struct csc_cfg *csc)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(csc->matrix); i++) {
+                mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_MV(pipe, i),
+                                csc->matrix[i]);
+        }
+
+        for (i = 0; i < ARRAY_SIZE(csc->post_bias) ; i++) {
+                mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_PRE_BV(pipe, i),
+                                csc->pre_bias[i]);
+
+                mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_POST_BV(pipe, i),
+                                csc->post_bias[i]);
+        }
+
+        for (i = 0; i < ARRAY_SIZE(csc->post_clamp) ; i++) {
+                mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_PRE_LV(pipe, i),
+                                csc->pre_clamp[i]);
+
+                mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_POST_LV(pipe, i),
+                                csc->post_clamp[i]);
+        }
+}
+
 #define MDP4_VG_PHASE_STEP_DEFAULT      0x20000000
 
 static int mdp4_plane_mode_set(struct drm_plane *plane,
@@ -163,6 +195,7 @@ static int mdp4_plane_mode_set(struct drm_plane *plane,
                 uint32_t src_x, uint32_t src_y,
                 uint32_t src_w, uint32_t src_h)
 {
+        struct drm_device *dev = plane->dev;
         struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
         struct mdp4_kms *mdp4_kms = get_kms(plane);
         enum mdp4_pipe pipe = mdp4_plane->pipe;
@@ -186,14 +219,59 @@ static int mdp4_plane_mode_set(struct drm_plane *plane,
                         fb->base.id, src_x, src_y, src_w, src_h,
                         crtc->base.id, crtc_x, crtc_y, crtc_w, crtc_h);
 
+        format = to_mdp_format(msm_framebuffer_format(fb));
+
+        if (src_w > (crtc_w * DOWN_SCALE_MAX)) {
+                dev_err(dev->dev, "Width down scaling exceeds limits!\n");
+                return -ERANGE;
+        }
+
+        if (src_h > (crtc_h * DOWN_SCALE_MAX)) {
+                dev_err(dev->dev, "Height down scaling exceeds limits!\n");
+                return -ERANGE;
+        }
+
+        if (crtc_w > (src_w * UP_SCALE_MAX)) {
+                dev_err(dev->dev, "Width up scaling exceeds limits!\n");
+                return -ERANGE;
+        }
+
+        if (crtc_h > (src_h * UP_SCALE_MAX)) {
+                dev_err(dev->dev, "Height up scaling exceeds limits!\n");
+                return -ERANGE;
+        }
+
         if (src_w != crtc_w) {
+                uint32_t sel_unit = SCALE_FIR;
                 op_mode |= MDP4_PIPE_OP_MODE_SCALEX_EN;
-                /* TODO calc phasex_step */
+
+                if (MDP_FORMAT_IS_YUV(format)) {
+                        if (crtc_w > src_w)
+                                sel_unit = SCALE_PIXEL_RPT;
+                        else if (crtc_w <= (src_w / 4))
+                                sel_unit = SCALE_MN_PHASE;
+
+                        op_mode |= MDP4_PIPE_OP_MODE_SCALEX_UNIT_SEL(sel_unit);
+                        phasex_step = mult_frac(MDP4_VG_PHASE_STEP_DEFAULT,
+                                        src_w, crtc_w);
+                }
         }
 
         if (src_h != crtc_h) {
+                uint32_t sel_unit = SCALE_FIR;
                 op_mode |= MDP4_PIPE_OP_MODE_SCALEY_EN;
-                /* TODO calc phasey_step */
+
+                if (MDP_FORMAT_IS_YUV(format)) {
+
+                        if (crtc_h > src_h)
+                                sel_unit = SCALE_PIXEL_RPT;
+                        else if (crtc_h <= (src_h / 4))
+                                sel_unit = SCALE_MN_PHASE;
+
+                        op_mode |= MDP4_PIPE_OP_MODE_SCALEY_UNIT_SEL(sel_unit);
+                        phasey_step = mult_frac(MDP4_VG_PHASE_STEP_DEFAULT,
+                                        src_h, crtc_h);
+                }
         }
 
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_SIZE(pipe),
@@ -214,8 +292,6 @@ static int mdp4_plane_mode_set(struct drm_plane *plane,
 
         mdp4_plane_set_scanout(plane, fb);
 
-        format = to_mdp_format(msm_framebuffer_format(fb));
-
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_FORMAT(pipe),
                         MDP4_PIPE_SRC_FORMAT_A_BPC(format->bpc_a) |
                         MDP4_PIPE_SRC_FORMAT_R_BPC(format->bpc_r) |
@@ -224,6 +300,8 @@ static int mdp4_plane_mode_set(struct drm_plane *plane,
                         COND(format->alpha_enable, MDP4_PIPE_SRC_FORMAT_ALPHA_ENABLE) |
                         MDP4_PIPE_SRC_FORMAT_CPP(format->cpp - 1) |
                         MDP4_PIPE_SRC_FORMAT_UNPACK_COUNT(format->unpack_count - 1) |
+                        MDP4_PIPE_SRC_FORMAT_FETCH_PLANES(format->fetch_type) |
+                        MDP4_PIPE_SRC_FORMAT_CHROMA_SAMP(format->chroma_sample) |
                         COND(format->unpack_tight, MDP4_PIPE_SRC_FORMAT_UNPACK_TIGHT));
 
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_UNPACK(pipe),
@@ -232,6 +310,14 @@ static int mdp4_plane_mode_set(struct drm_plane *plane,
                         MDP4_PIPE_SRC_UNPACK_ELEM2(format->unpack[2]) |
                         MDP4_PIPE_SRC_UNPACK_ELEM3(format->unpack[3]));
 
+        if (MDP_FORMAT_IS_YUV(format)) {
+                struct csc_cfg *csc = mdp_get_default_csc_cfg(CSC_YUV2RGB);
+
+                op_mode |= MDP4_PIPE_OP_MODE_SRC_YCBCR;
+                op_mode |= MDP4_PIPE_OP_MODE_CSC_EN;
+                mdp4_write_csc_config(mdp4_kms, pipe, csc);
+        }
+
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(pipe), op_mode);
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEX_STEP(pipe), phasex_step);
         mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEY_STEP(pipe), phasey_step);