[media] v4l: ti-vpe: make vpe driver load scaler coefficients

Make the driver allocate dma buffers to store horizontal and scaler coeffs.
Use the scaler library api to choose and copy scaler coefficients to a
the above buffers based on the scaling ratio. Since the SC block comes after
the de-interlacer, make sure that the source height is doubled if de-interlacer
was used.

These buffers now need to be used by VPDMA to load the coefficients into the
SRAM within SC.

In device_run, add configuration descriptors which have payloads pointing to
the scaler coefficients in memory. Use the members in sc_data handle to prevent
addition of these descriptors if there isn't a need to re-load coefficients into
SC. This comes helps unnecessary re-loading of the coefficients when we switch
back and forth between vpe contexts.

Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 46 insertions, 1 deletions

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index ecb85f9ae3ab..50d6d0e696e7 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -356,6 +356,8 @@ struct vpe_ctx {
         void                    *mv_buf[2];             /* virtual addrs of motion vector bufs */
         size_t                  mv_buf_size;            /* current motion vector buffer size */
         struct vpdma_buf        mmr_adb;                /* shadow reg addr/data block */
+        struct vpdma_buf        sc_coeff_h;             /* h coeff buffer */
+        struct vpdma_buf        sc_coeff_v;             /* v coeff buffer */
         struct vpdma_desc_list  desc_list;              /* DMA descriptor list */
 
         bool                    deinterlacing;          /* using de-interlacer */
@@ -765,6 +767,10 @@ static int set_srcdst_params(struct vpe_ctx *ctx)
         struct vpe_q_data *s_q_data =  &ctx->q_data[Q_DATA_SRC];
         struct vpe_q_data *d_q_data =  &ctx->q_data[Q_DATA_DST];
         struct vpe_mmr_adb *mmr_adb = ctx->mmr_adb.addr;
+        unsigned int src_w = s_q_data->c_rect.width;
+        unsigned int src_h = s_q_data->c_rect.height;
+        unsigned int dst_w = d_q_data->c_rect.width;
+        unsigned int dst_h = d_q_data->c_rect.height;
         size_t mv_buf_size;
         int ret;
 
@@ -777,7 +783,6 @@ static int set_srcdst_params(struct vpe_ctx *ctx)
                 const struct vpdma_data_format *mv =
                         &vpdma_misc_fmts[VPDMA_DATA_FMT_MV];
 
-                ctx->deinterlacing = 1;
                 /*
                  * we make sure that the source image has a 16 byte aligned
                  * stride, we need to do the same for the motion vector buffer
@@ -788,6 +793,9 @@ static int set_srcdst_params(struct vpe_ctx *ctx)
                 bytes_per_line = ALIGN((s_q_data->width * mv->depth) >> 3,
                                         VPDMA_STRIDE_ALIGN);
                 mv_buf_size = bytes_per_line * s_q_data->height;
+
+                ctx->deinterlacing = 1;
+                src_h <<= 1;
         } else {
                 ctx->deinterlacing = 0;
                 mv_buf_size = 0;
@@ -802,6 +810,8 @@ static int set_srcdst_params(struct vpe_ctx *ctx)
         set_cfg_and_line_modes(ctx);
         set_dei_regs(ctx);
         set_csc_coeff_bypass(ctx);
+        sc_set_hs_coeffs(ctx->dev->sc, ctx->sc_coeff_h.addr, src_w, dst_w);
+        sc_set_vs_coeffs(ctx->dev->sc, ctx->sc_coeff_v.addr, src_h, dst_h);
         sc_set_regs_bypass(ctx->dev->sc, &mmr_adb->sc_regs[0]);
 
         return 0;
@@ -1035,6 +1045,7 @@ static void disable_irqs(struct vpe_ctx *ctx)
 static void device_run(void *priv)
 {
         struct vpe_ctx *ctx = priv;
+        struct sc_data *sc = ctx->dev->sc;
         struct vpe_q_data *d_q_data = &ctx->q_data[Q_DATA_DST];
 
         if (ctx->deinterlacing && ctx->src_vbs[2] == NULL) {
@@ -1057,6 +1068,26 @@ static void device_run(void *priv)
                 ctx->load_mmrs = false;
         }
 
+        if (sc->loaded_coeff_h != ctx->sc_coeff_h.dma_addr ||
+                        sc->load_coeff_h) {
+                vpdma_map_desc_buf(ctx->dev->vpdma, &ctx->sc_coeff_h);
+                vpdma_add_cfd_block(&ctx->desc_list, CFD_SC_CLIENT,
+                        &ctx->sc_coeff_h, 0);
+
+                sc->loaded_coeff_h = ctx->sc_coeff_h.dma_addr;
+                sc->load_coeff_h = false;
+        }
+
+        if (sc->loaded_coeff_v != ctx->sc_coeff_v.dma_addr ||
+                        sc->load_coeff_v) {
+                vpdma_map_desc_buf(ctx->dev->vpdma, &ctx->sc_coeff_v);
+                vpdma_add_cfd_block(&ctx->desc_list, CFD_SC_CLIENT,
+                        &ctx->sc_coeff_v, SC_COEF_SRAM_SIZE >> 4);
+
+                sc->loaded_coeff_v = ctx->sc_coeff_v.dma_addr;
+                sc->load_coeff_v = false;
+        }
+
         /* output data descriptors */
         if (ctx->deinterlacing)
                 add_out_dtd(ctx, VPE_PORT_MV_OUT);
@@ -1180,6 +1211,8 @@ static irqreturn_t vpe_irq(int irq_vpe, void *data)
 
         vpdma_unmap_desc_buf(dev->vpdma, &ctx->desc_list.buf);
         vpdma_unmap_desc_buf(dev->vpdma, &ctx->mmr_adb);
+        vpdma_unmap_desc_buf(dev->vpdma, &ctx->sc_coeff_h);
+        vpdma_unmap_desc_buf(dev->vpdma, &ctx->sc_coeff_v);
 
         vpdma_reset_desc_list(&ctx->desc_list);
 
@@ -1752,6 +1785,14 @@ static int vpe_open(struct file *file)
         if (ret != 0)
                 goto free_desc_list;
 
+        ret = vpdma_alloc_desc_buf(&ctx->sc_coeff_h, SC_COEF_SRAM_SIZE);
+        if (ret != 0)
+                goto free_mmr_adb;
+
+        ret = vpdma_alloc_desc_buf(&ctx->sc_coeff_v, SC_COEF_SRAM_SIZE);
+        if (ret != 0)
+                goto free_sc_h;
+
         init_adb_hdrs(ctx);
 
         v4l2_fh_init(&ctx->fh, video_devdata(file));
@@ -1820,6 +1861,10 @@ static int vpe_open(struct file *file)
 exit_fh:
         v4l2_ctrl_handler_free(hdl);
         v4l2_fh_exit(&ctx->fh);
+        vpdma_free_desc_buf(&ctx->sc_coeff_v);
+free_sc_h:
+        vpdma_free_desc_buf(&ctx->sc_coeff_h);
+free_mmr_adb:
         vpdma_free_desc_buf(&ctx->mmr_adb);
 free_desc_list:
         vpdma_free_desc_list(&ctx->desc_list);