OMAPDSS/OMAP_VOUT: Fix incorrect OMAP3-alpha compatibility setting

On OMAP3, in order to enable alpha blending for LCD and TV managers, we needed
to set LCDALPHABLENDERENABLE/TVALPHABLENDERENABLE bits in DISPC_CONFIG. On
OMAP4, alpha blending is always enabled by default, if the above bits are set,
we switch to an OMAP3 compatibility mode where the zorder values in the pipeline
attribute registers are ignored and a fixed priority is configured.

Rename the manager_info member "alpha_enabled" to "partial_alpha_enabled" for
more clarity. Introduce two dss_features FEAT_ALPHA_FIXED_ZORDER and
FEAT_ALPHA_FREE_ZORDER which represent OMAP3-alpha compatibility mode and OMAP4
alpha mode respectively. Introduce an overlay cap for ZORDER. The DSS2 user is
expected to check for the ZORDER cap, if an overlay doesn't have this cap, the
user is expected to set the parameter partial_alpha_enabled. If the overlay has
ZORDER cap, the DSS2 user can assume that alpha blending is already enabled.

Don't support OMAP3 compatibility mode for now. Trying to read/write to
alpha_blending_enabled sysfs attribute issues a warning for OMAP4 and does not
set the LCDALPHABLENDERENABLE/TVALPHABLENDERENABLE bits.

Change alpha_enabled to partial_alpha_enabled in the omap_vout driver. Use
overlay cap "OMAP_DSS_OVL_CAP_GLOBAL_ALPHA" to check if overlay supports alpha
blending or not. Replace this with checks for VIDEO1 pipeline.

Cc: linux-media@vger.kernel.org
Cc: Lajos Molnar <molnar@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Acked-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/drivers/media/video/omap/omap_vout.c b/drivers/media/video/omap/omap_vout.c
index e2f4780c00a06d928a222ae0d326ade0f1bb31d2..ec4a31f577a213da36db038ff38f2241b160367d 100644 (file)
--- a/drivers/media/video/omap/omap_vout.c
+++ b/drivers/media/video/omap/omap_vout.c
@@ -1164,12 +1164,17 @@ static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh,
 {
        int ret = 0;
        struct omap_vout_device *vout = fh;
+       struct omap_overlay *ovl;
+       struct omapvideo_info *ovid;
        struct v4l2_window *win = &f->fmt.win;
 
+       ovid = &vout->vid_info;
+       ovl = ovid->overlays[0];
+
        ret = omap_vout_try_window(&vout->fbuf, win);
 
        if (!ret) {
-               if (vout->vid == OMAP_VIDEO1)
+               if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
                        win->global_alpha = 255;
                else
                        win->global_alpha = f->fmt.win.global_alpha;
@@ -1193,8 +1198,8 @@ static int vidioc_s_fmt_vid_overlay(struct file *file, void *fh,
 
        ret = omap_vout_new_window(&vout->crop, &vout->win, &vout->fbuf, win);
        if (!ret) {
-               /* Video1 plane does not support global alpha */
-               if (ovl->id == OMAP_DSS_VIDEO1)
+               /* Video1 plane does not support global alpha on OMAP3 */
+               if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
                        vout->win.global_alpha = 255;
                else
                        vout->win.global_alpha = f->fmt.win.global_alpha;
@@ -1787,7 +1792,9 @@ static int vidioc_s_fbuf(struct file *file, void *fh,
        if (ovl->manager && ovl->manager->get_manager_info &&
                        ovl->manager->set_manager_info) {
                ovl->manager->get_manager_info(ovl->manager, &info);
-               info.alpha_enabled = enable;
+               /* enable this only if there is no zorder cap */
+               if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
+                       info.partial_alpha_enabled = enable;
                if (ovl->manager->set_manager_info(ovl->manager, &info))
                        return -EINVAL;
        }
@@ -1819,7 +1826,7 @@ static int vidioc_g_fbuf(struct file *file, void *fh,
        }
        if (ovl->manager && ovl->manager->get_manager_info) {
                ovl->manager->get_manager_info(ovl->manager, &info);
-               if (info.alpha_enabled)
+               if (info.partial_alpha_enabled)
                        a->flags |= V4L2_FBUF_FLAG_LOCAL_ALPHA;
        }
 

diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 5e6849e224c22e07c479a4c52bcb58ae63d274b0..e0639d328c5b3154b11b9ad0b9fffa055f34fcd7 100644 (file)
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -179,7 +179,8 @@ static void dispc_save_context(void)
        SR(CONTROL);
        SR(CONFIG);
        SR(LINE_NUMBER);
-       if (dss_has_feature(FEAT_GLOBAL_ALPHA))
+       if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
+                       dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
                SR(GLOBAL_ALPHA);
        if (dss_has_feature(FEAT_MGR_LCD2)) {
                SR(CONTROL2);
@@ -293,7 +294,8 @@ static void dispc_restore_context(void)
        /*RR(CONTROL);*/
        RR(CONFIG);
        RR(LINE_NUMBER);
-       if (dss_has_feature(FEAT_GLOBAL_ALPHA))
+       if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
+                       dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
                RR(GLOBAL_ALPHA);
        if (dss_has_feature(FEAT_MGR_LCD2))
                RR(CONFIG2);
@@ -2159,38 +2161,35 @@ void dispc_mgr_enable_trans_key(enum omap_channel ch, bool enable)
        else /* OMAP_DSS_CHANNEL_LCD2 */
                REG_FLD_MOD(DISPC_CONFIG2, enable, 10, 10);
 }
-void dispc_mgr_enable_alpha_blending(enum omap_channel ch, bool enable)
+
+void dispc_mgr_enable_alpha_fixed_zorder(enum omap_channel ch, bool enable)
 {
-       if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
+       if (!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
                return;
 
        if (ch == OMAP_DSS_CHANNEL_LCD)
                REG_FLD_MOD(DISPC_CONFIG, enable, 18, 18);
        else if (ch == OMAP_DSS_CHANNEL_DIGIT)
                REG_FLD_MOD(DISPC_CONFIG, enable, 19, 19);
-       else /* OMAP_DSS_CHANNEL_LCD2 */
-               REG_FLD_MOD(DISPC_CONFIG2, enable, 18, 18);
 }
-bool dispc_mgr_alpha_blending_enabled(enum omap_channel ch)
+
+bool dispc_mgr_alpha_fixed_zorder_enabled(enum omap_channel ch)
 {
        bool enabled;
 
-       if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
+       if (!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
                return false;
 
        if (ch == OMAP_DSS_CHANNEL_LCD)
                enabled = REG_GET(DISPC_CONFIG, 18, 18);
        else if (ch == OMAP_DSS_CHANNEL_DIGIT)
                enabled = REG_GET(DISPC_CONFIG, 19, 19);
-       else if (ch == OMAP_DSS_CHANNEL_LCD2)
-               enabled = REG_GET(DISPC_CONFIG2, 18, 18);
        else
                BUG();
 
        return enabled;
 }
 
-
 bool dispc_mgr_trans_key_enabled(enum omap_channel ch)
 {
        bool enabled;
@@ -2603,7 +2602,8 @@ void dispc_dump_regs(struct seq_file *s)
        DUMPREG(DISPC_CAPABLE);
        DUMPREG(DISPC_LINE_STATUS);
        DUMPREG(DISPC_LINE_NUMBER);
-       if (dss_has_feature(FEAT_GLOBAL_ALPHA))
+       if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
+                       dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
                DUMPREG(DISPC_GLOBAL_ALPHA);
        if (dss_has_feature(FEAT_MGR_LCD2)) {
                DUMPREG(DISPC_CONTROL2);

diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 8652007247780aa377d299e827032c85dd045a50..6308fc59fc9e97c317bc93cc33904d6e5383f3d7 100644 (file)
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -430,9 +430,9 @@ void dispc_mgr_get_trans_key(enum omap_channel ch,
                enum omap_dss_trans_key_type *type,
                u32 *trans_key);
 void dispc_mgr_enable_trans_key(enum omap_channel ch, bool enable);
-void dispc_mgr_enable_alpha_blending(enum omap_channel ch, bool enable);
+void dispc_mgr_enable_alpha_fixed_zorder(enum omap_channel ch, bool enable);
 bool dispc_mgr_trans_key_enabled(enum omap_channel ch);
-bool dispc_mgr_alpha_blending_enabled(enum omap_channel ch);
+bool dispc_mgr_alpha_fixed_zorder_enabled(enum omap_channel ch);
 void dispc_mgr_set_lcd_timings(enum omap_channel channel,
                struct omap_video_timings *timings);
 void dispc_mgr_set_pol_freq(enum omap_channel channel,

diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index a2fc8e0586897eab3d5cecd20f0df95bfe4ae698..eb08b003ba49282f6077d71b89109ffde73eec3d 100644 (file)
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -248,15 +248,16 @@ static const enum omap_overlay_caps omap3630_dss_overlay_caps[] = {
 
 static const enum omap_overlay_caps omap4_dss_overlay_caps[] = {
        /* OMAP_DSS_GFX */
-       OMAP_DSS_OVL_CAP_GLOBAL_ALPHA | OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA,
+       OMAP_DSS_OVL_CAP_GLOBAL_ALPHA | OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA |
+               OMAP_DSS_OVL_CAP_ZORDER,
 
        /* OMAP_DSS_VIDEO1 */
        OMAP_DSS_OVL_CAP_SCALE | OMAP_DSS_OVL_CAP_GLOBAL_ALPHA |
-               OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA,
+               OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA | OMAP_DSS_OVL_CAP_ZORDER,
 
        /* OMAP_DSS_VIDEO2 */
        OMAP_DSS_OVL_CAP_SCALE | OMAP_DSS_OVL_CAP_GLOBAL_ALPHA |
-               OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA,
+               OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA | OMAP_DSS_OVL_CAP_ZORDER,
 };
 
 static const char * const omap2_dss_clk_source_names[] = {
@@ -342,13 +343,13 @@ static const struct omap_dss_features omap3430_dss_features = {
        .num_reg_fields = ARRAY_SIZE(omap3_dss_reg_fields),
 
        .has_feature    =
-               FEAT_GLOBAL_ALPHA | FEAT_LCDENABLEPOL |
+               FEAT_LCDENABLEPOL |
                FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
                FEAT_FUNCGATED | FEAT_ROWREPEATENABLE |
                FEAT_LINEBUFFERSPLIT | FEAT_RESIZECONF |
                FEAT_DSI_PLL_FREQSEL | FEAT_DSI_REVERSE_TXCLKESC |
                FEAT_VENC_REQUIRES_TV_DAC_CLK | FEAT_CPR | FEAT_PRELOAD |
-               FEAT_FIR_COEF_V,
+               FEAT_FIR_COEF_V | FEAT_ALPHA_FIXED_ZORDER,
 
        .num_mgrs = 2,
        .num_ovls = 3,
@@ -366,13 +367,13 @@ static const struct omap_dss_features omap3630_dss_features = {
        .num_reg_fields = ARRAY_SIZE(omap3_dss_reg_fields),
 
        .has_feature    =
-               FEAT_GLOBAL_ALPHA | FEAT_LCDENABLEPOL |
+               FEAT_LCDENABLEPOL |
                FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
                FEAT_FUNCGATED |
                FEAT_ROWREPEATENABLE | FEAT_LINEBUFFERSPLIT |
                FEAT_RESIZECONF | FEAT_DSI_PLL_PWR_BUG |
                FEAT_DSI_PLL_FREQSEL | FEAT_CPR | FEAT_PRELOAD |
-               FEAT_FIR_COEF_V,
+               FEAT_FIR_COEF_V | FEAT_ALPHA_FIXED_ZORDER,
 
        .num_mgrs = 2,
        .num_ovls = 3,
@@ -392,12 +393,12 @@ static const struct omap_dss_features omap4430_es1_0_dss_features  = {
        .num_reg_fields = ARRAY_SIZE(omap4_dss_reg_fields),
 
        .has_feature    =
-               FEAT_GLOBAL_ALPHA |
                FEAT_MGR_LCD2 |
                FEAT_CORE_CLK_DIV | FEAT_LCD_CLK_SRC |
                FEAT_DSI_DCS_CMD_CONFIG_VC | FEAT_DSI_VC_OCP_WIDTH |
                FEAT_DSI_GNQ | FEAT_HANDLE_UV_SEPARATE | FEAT_ATTR2 |
-               FEAT_CPR | FEAT_PRELOAD | FEAT_FIR_COEF_V,
+               FEAT_CPR | FEAT_PRELOAD | FEAT_FIR_COEF_V |
+               FEAT_ALPHA_FREE_ZORDER,
 
        .num_mgrs = 3,
        .num_ovls = 3,
@@ -416,13 +417,12 @@ static const struct omap_dss_features omap4_dss_features = {
        .num_reg_fields = ARRAY_SIZE(omap4_dss_reg_fields),
 
        .has_feature    =
-               FEAT_GLOBAL_ALPHA |
                FEAT_MGR_LCD2 |
                FEAT_CORE_CLK_DIV | FEAT_LCD_CLK_SRC |
                FEAT_DSI_DCS_CMD_CONFIG_VC | FEAT_DSI_VC_OCP_WIDTH |
                FEAT_DSI_GNQ | FEAT_HDMI_CTS_SWMODE |
                FEAT_HANDLE_UV_SEPARATE | FEAT_ATTR2 | FEAT_CPR |
-               FEAT_PRELOAD | FEAT_FIR_COEF_V,
+               FEAT_PRELOAD | FEAT_FIR_COEF_V | FEAT_ALPHA_FREE_ZORDER,
 
        .num_mgrs = 3,
        .num_ovls = 3,

diff --git a/drivers/video/omap2/dss/dss_features.h b/drivers/video/omap2/dss/dss_features.h
index cd606447fcfcb60ae5c01be532a1ed1bc555c11e..e81271a0e005f9b908dbaf215322f7fb2c9b9957 100644 (file)
--- a/drivers/video/omap2/dss/dss_features.h
+++ b/drivers/video/omap2/dss/dss_features.h
@@ -31,7 +31,6 @@
 
 /* DSS has feature id */
 enum dss_feat_id {
-       FEAT_GLOBAL_ALPHA               = 1 << 0,
        FEAT_LCDENABLEPOL               = 1 << 3,
        FEAT_LCDENABLESIGNAL            = 1 << 4,
        FEAT_PCKFREEENABLE              = 1 << 5,
@@ -57,6 +56,8 @@ enum dss_feat_id {
        FEAT_CPR                        = 1 << 23,
        FEAT_PRELOAD                    = 1 << 24,
        FEAT_FIR_COEF_V                 = 1 << 25,
+       FEAT_ALPHA_FIXED_ZORDER         = 1 << 26,
+       FEAT_ALPHA_FREE_ZORDER          = 1 << 27,
 };
 
 /* DSS register field id */

diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index fdbbeebcd75cb5df1e24f28f6147ddcc87346d53..6e63845cc7d7705ad5dd0217e5b2247564218483 100644 (file)
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -249,7 +249,10 @@ static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
 static ssize_t manager_alpha_blending_enabled_show(
                struct omap_overlay_manager *mgr, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%d\n", mgr->info.alpha_enabled);
+       WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
+
+       return snprintf(buf, PAGE_SIZE, "%d\n",
+               mgr->info.partial_alpha_enabled);
 }
 
 static ssize_t manager_alpha_blending_enabled_store(
@@ -260,13 +263,15 @@ static ssize_t manager_alpha_blending_enabled_store(
        bool enable;
        int r;
 
+       WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
+
        r = strtobool(buf, &enable);
        if (r)
                return r;
 
        mgr->get_manager_info(mgr, &info);
 
-       info.alpha_enabled = enable;
+       info.partial_alpha_enabled = enable;
 
        r = mgr->set_manager_info(mgr, &info);
        if (r)
@@ -966,7 +971,7 @@ static void configure_manager(enum omap_channel channel)
        dispc_mgr_set_default_color(channel, mi->default_color);
        dispc_mgr_set_trans_key(channel, mi->trans_key_type, mi->trans_key);
        dispc_mgr_enable_trans_key(channel, mi->trans_enabled);
-       dispc_mgr_enable_alpha_blending(channel, mi->alpha_enabled);
+       dispc_mgr_enable_alpha_fixed_zorder(channel, mi->partial_alpha_enabled);
        if (dss_has_feature(FEAT_CPR)) {
                dispc_mgr_enable_cpr(channel, mi->cpr_enable);
                dispc_mgr_set_cpr_coef(channel, &mi->cpr_coefs);
@@ -1481,12 +1486,17 @@ static int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
 
 static int dss_check_manager(struct omap_overlay_manager *mgr)
 {
-       /* OMAP supports only graphics source transparency color key and alpha
-        * blending simultaneously. See TRM 15.4.2.4.2.2 Alpha Mode */
-
-       if (mgr->info.alpha_enabled && mgr->info.trans_enabled &&
-                       mgr->info.trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST)
-               return -EINVAL;
+       if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
+               /*
+                * OMAP3 supports only graphics source transparency color key
+                * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
+                * Alpha Mode
+                */
+               if (mgr->info.partial_alpha_enabled && mgr->info.trans_enabled
+                       && mgr->info.trans_key_type !=
+                               OMAP_DSS_COLOR_KEY_GFX_DST)
+                       return -EINVAL;
+       }
 
        return 0;
 }

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 2123fb2d51cbe9533fa5dc087d6e01c5d113ad2b..3db8b4c4d6ed385f8ccd2fff3800712f4156fac4 100644 (file)
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -179,6 +179,7 @@ enum omap_overlay_caps {
        OMAP_DSS_OVL_CAP_SCALE = 1 << 0,
        OMAP_DSS_OVL_CAP_GLOBAL_ALPHA = 1 << 1,
        OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA = 1 << 2,
+       OMAP_DSS_OVL_CAP_ZORDER = 1 << 3,
 };
 
 enum omap_overlay_manager_caps {
@@ -412,7 +413,7 @@ struct omap_overlay_manager_info {
        u32 trans_key;
        bool trans_enabled;
 
-       bool alpha_enabled;
+       bool partial_alpha_enabled;
 
        bool cpr_enable;
        struct omap_dss_cpr_coefs cpr_coefs;