[PATCH 1/2] drm: Pretty print mode flags
Ville Syrjälä
ville.syrjala at linux.intel.com
Mon Jun 24 12:37:41 UTC 2019
On Thu, Jun 20, 2019 at 10:25:42PM +0200, Sam Ravnborg wrote:
> Hi Ville.
>
> On Thu, Jun 20, 2019 at 09:50:48PM +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > Decode the mode flags when printing the modeline so that I
> > no longer have to decode the hex number myself.
> You are extending the current way to print mode flags,
> but I would anyway like to point out a different approach.
>
> When I need to print a fourcc code it is as simple as:
>
> {
> struct drm_format_name_buf fbuf;
>
> printk("My format: %s\n", drm_get_format_name(format, &fbuf);
> }
>
> This way to handle this feels more straightforward
> than the current approach used for modes.
>
> Maybe bikeshedding, as your mileage may vary.
You're suggesting to print the whole mode to a temp buffer, and then
print that with just %s? I thought about that, but it would waste
even more stack so didn't think it was all that great.
>
> A middle ground could be to introduce a struct for the buf so we know
> the callers do it right.
I'm not a fan of that struct approach because it forces you to use
a dedicated buffer for the thing. With just a raw char[] you can
print to anything, so it could be used more like strcat() as well.
Also I think it makes it more clear how much stack space you're
blowing away. And it looks a bit like snprintf() so it's more
clear what's happening on. Although in this case that last point
is kinda lost due to the macro thing.
>
> Most of the code would be the same, but all call sites would need to be
> updated.
> What do you think?
>
> Sam
>
>
> >
> > To do this neatly I made the caller provide a temporary
> > on stack buffer where we can produce the results. I choce 64
> > bytes as a reasonable size for this. The worst case I think
> > is > 100 bytes but that kind of mode would be nonsense anyway
> > so I figured correct decoding isn't as important in such
> > cases.
> >
> > Cc: Russell King <linux at armlinux.org.uk>
> > Cc: Neil Armstrong <narmstrong at baylibre.com>
> > Cc: Rob Clark <robdclark at gmail.com>
> > Cc: Tomi Valkeinen <tomi.valkeinen at ti.com>
> > Cc: Thierry Reding <thierry.reding at gmail.com>
> > Cc: Sam Ravnborg <sam at ravnborg.org>
> > Cc: Benjamin Gaignard <benjamin.gaignard at linaro.org>
> > Cc: Vincent Abriou <vincent.abriou at st.com>
> > Cc: linux-amlogic at lists.infradead.org
> > Cc: linux-arm-msm at vger.kernel.org
> > Cc: freedreno at lists.freedesktop.org
> > Cc: Ilia Mirkin <imirkin at alum.mit.edu>
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> > drivers/gpu/drm/armada/armada_crtc.c | 3 +-
> > drivers/gpu/drm/drm_atomic.c | 3 +-
> > drivers/gpu/drm/drm_modes.c | 116 +++++++++++++++++-
> > drivers/gpu/drm/i915/i915_debugfs.c | 3 +-
> > drivers/gpu/drm/meson/meson_dw_hdmi.c | 3 +-
> > drivers/gpu/drm/meson/meson_venc.c | 4 +-
> > drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c | 3 +-
> > .../gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c | 3 +-
> > .../gpu/drm/msm/disp/mdp4/mdp4_dtv_encoder.c | 3 +-
> > .../gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c | 3 +-
> > .../gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c | 4 +-
> > drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 3 +-
> > drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c | 3 +-
> > drivers/gpu/drm/msm/dsi/dsi_manager.c | 3 +-
> > drivers/gpu/drm/msm/edp/edp_bridge.c | 3 +-
> > drivers/gpu/drm/omapdrm/omap_connector.c | 5 +-
> > drivers/gpu/drm/omapdrm/omap_crtc.c | 3 +-
> > drivers/gpu/drm/panel/panel-ronbo-rb070d30.c | 3 +-
> > drivers/gpu/drm/sti/sti_crtc.c | 3 +-
> > include/drm/drm_modes.h | 14 ++-
> > 20 files changed, 165 insertions(+), 23 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
> > index ba4a3fab7745..ce9335682bd2 100644
> > --- a/drivers/gpu/drm/armada/armada_crtc.c
> > +++ b/drivers/gpu/drm/armada/armada_crtc.c
> > @@ -262,6 +262,7 @@ static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > unsigned long flags;
> > unsigned i;
> > bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE);
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > i = 0;
> > rm = adj->crtc_hsync_start - adj->crtc_hdisplay;
> > @@ -270,7 +271,7 @@ static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > tm = adj->crtc_vtotal - adj->crtc_vsync_end;
> >
> > DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n",
> > - crtc->base.id, crtc->name, DRM_MODE_ARG(adj));
> > + crtc->base.id, crtc->name, DRM_MODE_ARG(adj, buf));
> > DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm);
> >
> > /* Now compute the divider for real */
> > diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> > index 419381abbdd1..81caf91fbd72 100644
> > --- a/drivers/gpu/drm/drm_atomic.c
> > +++ b/drivers/gpu/drm/drm_atomic.c
> > @@ -380,6 +380,7 @@ static void drm_atomic_crtc_print_state(struct drm_printer *p,
> > const struct drm_crtc_state *state)
> > {
> > struct drm_crtc *crtc = state->crtc;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
> > drm_printf(p, "\tenable=%d\n", state->enable);
> > @@ -393,7 +394,7 @@ static void drm_atomic_crtc_print_state(struct drm_printer *p,
> > drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
> > drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
> > drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
> > - drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
> > + drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode, buf));
> >
> > if (crtc->funcs->atomic_print_state)
> > crtc->funcs->atomic_print_state(p, state);
> > diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> > index 57e6408288c8..3d15c600295a 100644
> > --- a/drivers/gpu/drm/drm_modes.c
> > +++ b/drivers/gpu/drm/drm_modes.c
> > @@ -45,6 +45,118 @@
> >
> > #include "drm_crtc_internal.h"
> >
> > +static char *snprint_cont(char *buf, int *len,
> > + const char *str, bool last)
> > +{
> > + int r;
> > +
> > + r = snprintf(buf, *len, "%s%s", str, last ? "" : ",");
> > + if (r >= *len)
> > + return buf;
> > +
> > + *len -= r;
> > + buf += r;
> > +
> > + return buf;
> > +}
> > +
> > +#define MODE_STR(x) { .name = #x, .flag = DRM_MODE_FLAG_ ## x, }
> > +
> > +static const struct {
> > + const char *name;
> > + u32 flag;
> > +} mode_flags[] = {
> > + MODE_STR(PHSYNC),
> > + MODE_STR(NHSYNC),
> > + MODE_STR(PVSYNC),
> > + MODE_STR(NVSYNC),
> > + MODE_STR(INTERLACE),
> > + MODE_STR(CSYNC),
> > + MODE_STR(PCSYNC),
> > + MODE_STR(NCSYNC),
> > + MODE_STR(DBLSCAN),
> > + MODE_STR(HSKEW),
> > + MODE_STR(DBLCLK),
> > + MODE_STR(CLKDIV2),
> > +};
> > +
> > +#undef MODE_STR
> > +#define MODE_STR(x) [DRM_MODE_FLAG_3D_ ## x >> 14] = #x
> > +
> > +static const char * const stereo_flags[] = {
> > + MODE_STR(NONE),
> > + MODE_STR(FRAME_PACKING),
> > + MODE_STR(FIELD_ALTERNATIVE),
> > + MODE_STR(LINE_ALTERNATIVE),
> > + MODE_STR(SIDE_BY_SIDE_FULL),
> > + MODE_STR(L_DEPTH),
> > + MODE_STR(L_DEPTH_GFX_GFX_DEPTH),
> > + MODE_STR(TOP_AND_BOTTOM),
> > + MODE_STR(SIDE_BY_SIDE_HALF),
> > +};
> > +
> > +#undef MODE_STR
> > +#define MODE_STR(x) [DRM_MODE_FLAG_PIC_AR_ ## x >> 19] = #x
> > +
> > +static const char * const aspect_flags[] = {
> > + MODE_STR(NONE),
> > + MODE_STR(4_3),
> > + MODE_STR(16_9),
> > + MODE_STR(64_27),
> > + MODE_STR(256_135),
> > +};
> > +
> > +#undef MODE_STR
> > +
> > +const char *drm_get_mode_flags_name(char *buf, int len, u32 flags)
> > +{
> > + char *ptr = buf;
> > + int i;
> > +
> > + if (len == 0)
> > + return buf;
> > +
> > + buf[0] = '\0';
> > +
> > + if (flags & DRM_MODE_FLAG_3D_MASK) {
> > + int stereo = (flags & DRM_MODE_FLAG_3D_MASK) >> 14;
> > +
> > + if (stereo < ARRAY_SIZE(stereo_flags)) {
> > + flags &= ~DRM_MODE_FLAG_3D_MASK;
> > + ptr = snprint_cont(ptr, &len,
> > + stereo_flags[stereo], !flags);
> > + }
> > + }
> > +
> > + if (flags & DRM_MODE_FLAG_PIC_AR_MASK) {
> > + int aspect = (flags & DRM_MODE_FLAG_PIC_AR_MASK) >> 19;
> > +
> > + if (aspect < ARRAY_SIZE(aspect_flags)) {
> > + flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
> > + ptr = snprint_cont(ptr, &len,
> > + aspect_flags[aspect], !flags);
> > + }
> > + }
> > +
> > + for (i = 0; i < ARRAY_SIZE(mode_flags); i++) {
> > + u32 flag = mode_flags[i].flag;
> > +
> > + if ((flags & flag) == 0)
> > + continue;
> > +
> > + flags &= ~flag;
> > +
> > + ptr = snprint_cont(ptr, &len,
> > + mode_flags[i].name, !flags);
> > + }
> > +
> > + if (flags)
> > + ptr = snprint_cont(ptr, &len, "?", true);
> > +
> > + return buf;
> > +}
> > +EXPORT_SYMBOL(drm_get_mode_flags_name);
> > +
> > /**
> > * drm_mode_debug_printmodeline - print a mode to dmesg
> > * @mode: mode to print
> > @@ -53,7 +165,9 @@
> > */
> > void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
> > {
> > - DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> > +
> > + DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode, buf));
> > }
> > EXPORT_SYMBOL(drm_mode_debug_printmodeline);
> >
> > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> > index 62cf34db9280..18a3ff8e1461 100644
> > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > @@ -2539,12 +2539,13 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
> > static void intel_seq_print_mode(struct seq_file *m, int tabs,
> > struct drm_display_mode *mode)
> > {
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> > int i;
> >
> > for (i = 0; i < tabs; i++)
> > seq_putc(m, '\t');
> >
> > - seq_printf(m, DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
> > + seq_printf(m, DRM_MODE_FMT "\n", DRM_MODE_ARG(mode, buf));
> > }
> >
> > static void intel_encoder_info(struct seq_file *m,
> > diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> > index df3f9ddd2234..30e53a043ba6 100644
> > --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> > +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> > @@ -610,13 +610,14 @@ dw_hdmi_mode_valid(struct drm_connector *connector,
> > const struct drm_display_mode *mode)
> > {
> > struct meson_drm *priv = connector->dev->dev_private;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> > unsigned int vclk_freq;
> > unsigned int venc_freq;
> > unsigned int hdmi_freq;
> > int vic = drm_match_cea_mode(mode);
> > enum drm_mode_status status;
> >
> > - DRM_DEBUG_DRIVER("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
> > + DRM_DEBUG_DRIVER("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode, buf));
> >
> > /* If sink max TMDS clock, we reject the mode */
> > if (connector->display_info.max_tmds_clock &&
> > diff --git a/drivers/gpu/drm/meson/meson_venc.c b/drivers/gpu/drm/meson/meson_venc.c
> > index 7b7a0d8d737c..09acbc06f9f3 100644
> > --- a/drivers/gpu/drm/meson/meson_venc.c
> > +++ b/drivers/gpu/drm/meson/meson_venc.c
> > @@ -987,9 +987,11 @@ void meson_venc_hdmi_mode_set(struct meson_drm *priv, int vic,
> > if (meson_venc_hdmi_supported_vic(vic)) {
> > vmode = meson_venc_hdmi_get_vic_vmode(vic);
> > if (!vmode) {
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> > +
> > dev_err(priv->dev, "%s: Fatal Error, unsupported mode "
> > DRM_MODE_FMT "\n", __func__,
> > - DRM_MODE_ARG(mode));
> > + DRM_MODE_ARG(mode, buf));
> > return;
> > }
> > } else {
> > diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
> > index 0cfd4c06b610..f68d9f74b0e4 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
> > @@ -238,6 +238,7 @@ static void mdp4_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > enum mdp4_dma dma = mdp4_crtc->dma;
> > int ovlp = mdp4_crtc->ovlp;
> > struct drm_display_mode *mode;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > if (WARN_ON(!crtc->state))
> > return;
> > @@ -245,7 +246,7 @@ static void mdp4_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > mode = &crtc->state->adjusted_mode;
> >
> > DBG("%s: set mode: " DRM_MODE_FMT,
> > - mdp4_crtc->name, DRM_MODE_ARG(mode));
> > + mdp4_crtc->name, DRM_MODE_ARG(mode, buf));
> >
> > mdp4_write(mdp4_kms, REG_MDP4_DMA_SRC_SIZE(dma),
> > MDP4_DMA_SRC_SIZE_WIDTH(mode->hdisplay) |
> > diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c
> > index caa39b4621e3..2e0dca4d2484 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c
> > @@ -55,10 +55,11 @@ static void mdp4_dsi_encoder_mode_set(struct drm_encoder *encoder,
> > uint32_t dsi_hsync_skew, vsync_period, vsync_len, ctrl_pol;
> > uint32_t display_v_start, display_v_end;
> > uint32_t hsync_start_x, hsync_end_x;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > mode = adjusted_mode;
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > ctrl_pol = 0;
> > if (mode->flags & DRM_MODE_FLAG_NHSYNC)
> > diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_dtv_encoder.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_dtv_encoder.c
> > index 259d51971401..e88ac070a672 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_dtv_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_dtv_encoder.c
> > @@ -101,10 +101,11 @@ static void mdp4_dtv_encoder_mode_set(struct drm_encoder *encoder,
> > uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
> > uint32_t display_v_start, display_v_end;
> > uint32_t hsync_start_x, hsync_end_x;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > mode = adjusted_mode;
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > mdp4_dtv_encoder->pixclock = mode->clock * 1000;
> >
> > diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c
> > index df6f9803a1d7..99bdae9c945b 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c
> > @@ -270,10 +270,11 @@ static void mdp4_lcdc_encoder_mode_set(struct drm_encoder *encoder,
> > uint32_t lcdc_hsync_skew, vsync_period, vsync_len, ctrl_pol;
> > uint32_t display_v_start, display_v_end;
> > uint32_t hsync_start_x, hsync_end_x;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > mode = adjusted_mode;
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > mdp4_lcdc_encoder->pixclock = mode->clock * 1000;
> >
> > diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
> > index eeef41fcd4e1..6bffbebee8bb 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
> > @@ -124,9 +124,11 @@ void mdp5_cmd_encoder_mode_set(struct drm_encoder *encoder,
> > struct drm_display_mode *mode,
> > struct drm_display_mode *adjusted_mode)
> > {
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> > +
> > mode = adjusted_mode;
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> > pingpong_tearcheck_setup(encoder, mode);
> > mdp5_crtc_set_pipeline(encoder->crtc);
> > }
> > diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > index c3751c95b452..888a25d1da8b 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> > @@ -378,13 +378,14 @@ static void mdp5_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > u32 mixer_width, val;
> > unsigned long flags;
> > struct drm_display_mode *mode;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > if (WARN_ON(!crtc->state))
> > return;
> >
> > mode = &crtc->state->adjusted_mode;
> >
> > - DBG("%s: set mode: " DRM_MODE_FMT, crtc->name, DRM_MODE_ARG(mode));
> > + DBG("%s: set mode: " DRM_MODE_FMT, crtc->name, DRM_MODE_ARG(mode, buf));
> >
> > mixer_width = mode->hdisplay;
> > if (r_mixer)
> > diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
> > index 820a62c40063..809118bb6965 100644
> > --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
> > @@ -115,10 +115,11 @@ static void mdp5_vid_encoder_mode_set(struct drm_encoder *encoder,
> > uint32_t hsync_start_x, hsync_end_x;
> > uint32_t format = 0x2100;
> > unsigned long flags;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > mode = adjusted_mode;
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > ctrl_pol = 0;
> >
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > index ec6cb0f7f206..1bf2f503b84b 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > @@ -527,8 +527,9 @@ static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
> > struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
> > struct mipi_dsi_host *host = msm_dsi->host;
> > bool is_dual_dsi = IS_DUAL_DSI();
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
> > return;
> > diff --git a/drivers/gpu/drm/msm/edp/edp_bridge.c b/drivers/gpu/drm/msm/edp/edp_bridge.c
> > index 2950bba4aca9..0844345862ef 100644
> > --- a/drivers/gpu/drm/msm/edp/edp_bridge.c
> > +++ b/drivers/gpu/drm/msm/edp/edp_bridge.c
> > @@ -51,8 +51,9 @@ static void edp_bridge_mode_set(struct drm_bridge *bridge,
> > struct drm_connector *connector;
> > struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
> > struct msm_edp *edp = edp_bridge->edp;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > - DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
> > + DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode, buf));
> >
> > list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
> > if ((connector->encoder != NULL) &&
> > diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
> > index 5967283934e1..4ce29288c70e 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_connector.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_connector.c
> > @@ -276,6 +276,7 @@ static enum drm_mode_status omap_connector_mode_valid(struct drm_connector *conn
> > struct omap_connector *omap_connector = to_omap_connector(connector);
> > struct drm_display_mode new_mode = { { 0 } };
> > enum drm_mode_status status;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > status = omap_connector_mode_fixup(omap_connector->output, mode,
> > &new_mode);
> > @@ -288,8 +289,8 @@ static enum drm_mode_status omap_connector_mode_valid(struct drm_connector *conn
> >
> > done:
> > DBG("connector: mode %s: " DRM_MODE_FMT,
> > - (status == MODE_OK) ? "valid" : "invalid",
> > - DRM_MODE_ARG(mode));
> > + (status == MODE_OK) ? "valid" : "invalid",
> > + DRM_MODE_ARG(mode, buf));
> >
> > return status;
> > }
> > diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
> > index d61215494617..221459d6abe9 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_crtc.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
> > @@ -553,9 +553,10 @@ static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > {
> > struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
> > struct drm_display_mode *mode = &crtc->state->adjusted_mode;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > DBG("%s: set mode: " DRM_MODE_FMT,
> > - omap_crtc->name, DRM_MODE_ARG(mode));
> > + omap_crtc->name, DRM_MODE_ARG(mode, buf));
> >
> > drm_display_mode_to_videomode(mode, &omap_crtc->vm);
> > }
> > diff --git a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
> > index 3c15764f0c03..468ebdca94f4 100644
> > --- a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
> > +++ b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
> > @@ -126,12 +126,13 @@ static int rb070d30_panel_get_modes(struct drm_panel *panel)
> > struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
> > struct drm_display_mode *mode;
> > static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > mode = drm_mode_duplicate(panel->drm, &default_mode);
> > if (!mode) {
> > DRM_DEV_ERROR(&ctx->dsi->dev,
> > "Failed to add mode " DRM_MODE_FMT "\n",
> > - DRM_MODE_ARG(&default_mode));
> > + DRM_MODE_ARG(&default_mode, buf));
> > return -EINVAL;
> > }
> >
> > diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c
> > index dc64fbfc4e61..bc9602f519d7 100644
> > --- a/drivers/gpu/drm/sti/sti_crtc.c
> > +++ b/drivers/gpu/drm/sti/sti_crtc.c
> > @@ -54,11 +54,12 @@ sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
> > struct sti_compositor *compo = dev_get_drvdata(dev);
> > struct clk *compo_clk, *pix_clk;
> > int rate = mode->clock * 1000;
> > + char buf[DRM_MODE_FLAGS_BUF_LEN];
> >
> > DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n",
> > crtc->base.id, sti_mixer_to_str(mixer), mode->name);
> >
> > - DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
> > + DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode, buf));
> >
> > if (mixer->id == STI_MIXER_MAIN) {
> > compo_clk = compo->clk_compo_main;
> > diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> > index 083f16747369..3962dbf82100 100644
> > --- a/include/drm/drm_modes.h
> > +++ b/include/drm/drm_modes.h
> > @@ -428,20 +428,27 @@ struct drm_display_mode {
> > struct list_head export_head;
> > };
> >
> > +/**
> > + * DRM_MODE_FLAGS_BUF_LEN - reasonable size for the buffer passed to DRM_MODE_ARG()
> > + */
> > +#define DRM_MODE_FLAGS_BUF_LEN 64
> > +
> > /**
> > * DRM_MODE_FMT - printf string for &struct drm_display_mode
> > */
> > -#define DRM_MODE_FMT "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
> > +#define DRM_MODE_FMT "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x %s"
> >
> > /**
> > * DRM_MODE_ARG - printf arguments for &struct drm_display_mode
> > * @m: display mode
> > + * @b: buffer for temporary string
> > */
> > -#define DRM_MODE_ARG(m) \
> > +#define DRM_MODE_ARG(m, b) \
> > (m)->name, (m)->vrefresh, (m)->clock, \
> > (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
> > (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
> > - (m)->type, (m)->flags
> > + (m)->type, (m)->flags, \
> > + drm_get_mode_flags_name(b, sizeof(b), (m)->flags)
> >
> > #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
> >
> > @@ -542,5 +549,6 @@ drm_mode_parse_command_line_for_connector(const char *mode_option,
> > struct drm_display_mode *
> > drm_mode_create_from_cmdline_mode(struct drm_device *dev,
> > struct drm_cmdline_mode *cmd);
> > +const char *drm_get_mode_flags_name(char *buf, int len, u32 flags);
> >
> > #endif /* __DRM_MODES_H__ */
> > --
> > 2.21.0
--
Ville Syrjälä
Intel
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