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Date: Mon, 6 Apr 2020 08:25:28 +0000
From: Angelo Ribeiro <Angelo.Ribeiro@...opsys.com>
To: Adrian Pop <pop.adrian61@...il.com>
CC: "yannick.fertre@...com" <yannick.fertre@...com>,
"philippe.cornu@...com" <philippe.cornu@...com>,
"benjamin.gaignard@...com" <benjamin.gaignard@...com>,
"airlied@...ux.ie" <airlied@...ux.ie>,
"daniel@...ll.ch" <daniel@...ll.ch>,
"mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
"alexandre.torgue@...com" <alexandre.torgue@...com>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"linux-stm32@...md-mailman.stormreply.com"
<linux-stm32@...md-mailman.stormreply.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Jose Abreu <Jose.Abreu@...opsys.com>,
"Gustavo Pimentel" <Gustavo.Pimentel@...opsys.com>,
Joao Pinto <Joao.Pinto@...opsys.com>
Subject: RE: [PATCH] drm/bridge: dw-mipi-dsi.c: Add VPG runtime config through
debugfs
Hi Adrian,
You are right!
Thanks for the help,
Angelo Ribeiro
From: Adrian Pop <pop.adrian61@...il.com>
Date: Sat, Apr 04, 2020 at 11:56:11
> Hello Angelo,
>
> I get a compile error: error: ‘VID_MODE_VPG_MODE’ undeclared. I am
> quite new to the mailing list, maybe I misapplied the patch.
>
> Regards,
> Adrian
>
>
> On Fri, Apr 3, 2020 at 6:37 PM Angelo Ribeiro
> <Angelo.Ribeiro@...opsys.com> wrote:
> >
> > Add support for the video pattern generator (VPG) BER pattern mode and
> > configuration in runtime.
> >
> > This enables using the debugfs interface to manipulate the VPG after
> > the pipeline is set.
> > Also, enables the usage of the VPG BER pattern.
> >
> > Cc: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
> > Cc: Joao Pinto <jpinto@...opsys.com>
> > Cc: Jose Abreu <jose.abreu@...opsys.com>
> > Signed-off-by: Angelo Ribeiro <angelo.ribeiro@...opsys.com>
> > ---
> > drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 97 ++++++++++++++++++++++++---
> > 1 file changed, 89 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > index b18351b..512c922 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > @@ -221,6 +221,21 @@
> > #define PHY_STATUS_TIMEOUT_US 10000
> > #define CMD_PKT_STATUS_TIMEOUT_US 20000
> >
> > +#ifdef CONFIG_DEBUG_FS
> > +#define VPG_DEFS(name, dsi) \
> > + ((void __force *)&((*dsi).vpg_defs.name))
> > +
> > +#define REGISTER(name, mask, dsi) \
> > + { #name, VPG_DEFS(name, dsi), mask, dsi }
> > +
> > +struct debugfs_entries {
> > + const char *name;
> > + bool *reg;
> > + u32 mask;
> > + struct dw_mipi_dsi *dsi;
> > +};
> > +#endif /* CONFIG_DEBUG_FS */
> > +
> > struct dw_mipi_dsi {
> > struct drm_bridge bridge;
> > struct mipi_dsi_host dsi_host;
> > @@ -238,9 +253,12 @@ struct dw_mipi_dsi {
> >
> > #ifdef CONFIG_DEBUG_FS
> > struct dentry *debugfs;
> > -
> > - bool vpg;
> > - bool vpg_horizontal;
> > + struct debugfs_entries *debugfs_vpg;
> > + struct {
> > + bool vpg;
> > + bool vpg_horizontal;
> > + bool vpg_ber_pattern;
> > + } vpg_defs;
> > #endif /* CONFIG_DEBUG_FS */
> >
> > struct dw_mipi_dsi *master; /* dual-dsi master ptr */
> > @@ -530,9 +548,11 @@ static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
> > val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
> >
> > #ifdef CONFIG_DEBUG_FS
> > - if (dsi->vpg) {
> > + if (dsi->vpg_defs.vpg) {
> > val |= VID_MODE_VPG_ENABLE;
> > - val |= dsi->vpg_horizontal ? VID_MODE_VPG_HORIZONTAL : 0;
> > + val |= dsi->vpg_defs.vpg_horizontal ?
> > + VID_MODE_VPG_HORIZONTAL : 0;
> > + val |= dsi->vpg_defs.vpg_ber_pattern ? VID_MODE_VPG_MODE : 0;
> > }
> > #endif /* CONFIG_DEBUG_FS */
> >
> > @@ -961,6 +981,68 @@ static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = {
> >
> > #ifdef CONFIG_DEBUG_FS
> >
> > +ssize_t dw_mipi_dsi_debugfs_write(void *data, u64 val)
> > +{
> > + struct debugfs_entries *vpg = data;
> > + struct dw_mipi_dsi *dsi;
> > + u32 mode_cfg;
> > +
> > + if (!vpg)
> > + return -ENODEV;
> > +
> > + dsi = vpg->dsi;
> > +
> > + *vpg->reg = (bool)val;
> > +
> > + mode_cfg = dsi_read(dsi, DSI_VID_MODE_CFG);
> > +
> > + if (*vpg->reg)
> > + mode_cfg |= vpg->mask;
> > + else
> > + mode_cfg &= ~vpg->mask;
> > +
> > + dsi_write(dsi, DSI_VID_MODE_CFG, mode_cfg);
> > +
> > + return 0;
> > +}
> > +
> > +ssize_t dw_mipi_dsi_debugfs_show(void *data, u64 *val)
> > +{
> > + struct debugfs_entries *vpg = data;
> > +
> > + if (!vpg)
> > + return -ENODEV;
> > +
> > + *val = *vpg->reg;
> > +
> > + return 0;
> > +}
> > +
> > +DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, dw_mipi_dsi_debugfs_show,
> > + dw_mipi_dsi_debugfs_write, "%llu\n");
> > +
> > +static void debugfs_create_files(void *data)
> > +{
> > + struct dw_mipi_dsi *dsi = data;
> > + struct debugfs_entries debugfs[] = {
> > + REGISTER(vpg, VID_MODE_VPG_ENABLE, dsi),
> > + REGISTER(vpg_horizontal, VID_MODE_VPG_HORIZONTAL, dsi),
> > + REGISTER(vpg_ber_pattern, VID_MODE_VPG_MODE, dsi),
> > + };
> > + int i;
> > +
> > + dsi->debugfs_vpg = kmalloc(sizeof(debugfs), GFP_KERNEL);
> > + if (!dsi->debugfs_vpg)
> > + return;
> > +
> > + memcpy(dsi->debugfs_vpg, debugfs, sizeof(debugfs));
> > +
> > + for (i = 0; i < ARRAY_SIZE(debugfs); i++)
> > + debugfs_create_file(dsi->debugfs_vpg[i].name, 0644,
> > + dsi->debugfs, &dsi->debugfs_vpg[i],
> > + &fops_x32);
> > +}
> > +
> > static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi)
> > {
> > dsi->debugfs = debugfs_create_dir(dev_name(dsi->dev), NULL);
> > @@ -969,14 +1051,13 @@ static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi)
> > return;
> > }
> >
> > - debugfs_create_bool("vpg", 0660, dsi->debugfs, &dsi->vpg);
> > - debugfs_create_bool("vpg_horizontal", 0660, dsi->debugfs,
> > - &dsi->vpg_horizontal);
> > + debugfs_create_files(dsi);
> > }
> >
> > static void dw_mipi_dsi_debugfs_remove(struct dw_mipi_dsi *dsi)
> > {
> > debugfs_remove_recursive(dsi->debugfs);
> > + kfree(dsi->debugfs_vpg);
> > }
> >
> > #else
> > --
> > 2.7.4
> >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@...ts.infradead.org
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.infradead.org_mailman_listinfo_linux-2Darm-2Dkernel&d=DwIFaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=-1lJkMi2j8IE8jpsNWO99o9zJFwyv1Mbjj3vJBR__i0&m=RVkzeuU9Ybr4sDavJDQlDQQNISVU7OADwa4H5svdMQI&s=Tz0W4ilX0ssp-RWLwnDjK_J0Ujjqj9TyjW4cVWK8TEM&e=
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