Thanks,
Vaibhav
> -----Original Message-----
> From: Taneja, Archit
> Sent: Monday, September 26, 2011 12:04 PM
> To: Hiremath, Vaibhav
> Cc: Valkeinen, Tomi; linux-omap@xxxxxxxxxxxxxxx; Semwal, Sumit; Taneja,
> Archit; linux-media@xxxxxxxxxxxxxxx; Molnar, Lajos
> Subject: [PATCH v3 3/3] 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@xxxxxxxxxxxxxxx
> Cc: Lajos Molnar <molnar@xxxxxx>
> Signed-off-by: Archit Taneja <archit@xxxxxx>
> ---
> Changes in v3:
> - Fix some spelling mistakes in commit message.
> - Add comment about video1 limitation in omap_vout .
>
> drivers/media/video/omap/omap_vout.c | 17 ++++++++++++-----
> drivers/video/omap2/dss/dispc.c | 24 ++++++++++++------------
> drivers/video/omap2/dss/dss.h | 4 ++--
> drivers/video/omap2/dss/dss_features.c | 22 +++++++++++-----------
> drivers/video/omap2/dss/dss_features.h | 3 ++-
> drivers/video/omap2/dss/manager.c | 28 +++++++++++++++++++--------
> -
> include/video/omapdss.h | 3 ++-
> 7 files changed, 60 insertions(+), 41 deletions(-)
>
Accked-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
Thanks,
Vaibhav
> diff --git a/drivers/media/video/omap/omap_vout.c
> b/drivers/media/video/omap/omap_vout.c
> index b3a5ecd..d9e64f3 100644
> --- a/drivers/media/video/omap/omap_vout.c
> +++ b/drivers/media/video/omap/omap_vout.c
> @@ -1165,12 +1165,17 @@ 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;
> @@ -1194,8 +1199,8 @@ 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;
> @@ -1788,7 +1793,9 @@ 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;
> }
> @@ -1820,7 +1827,7 @@ 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 5e6849e..e0639d3 100644
> --- 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 47eebd8..a37aef2 100644
> --- 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 47e66d8..70d5b9e 100644
> --- 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 cd60644..e81271a 100644
> --- 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 fdbbeeb..6e63845 100644
> --- 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 c62b9a4..5f0ce5e 100644
> --- 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 {
> @@ -406,7 +407,7 @@ 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;
> --
> 1.7.1
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