diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 119 |
1 files changed, 92 insertions, 27 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6e999bd..3924a7b 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -64,7 +64,8 @@ #define LEVEL_DMT 0 #define LEVEL_GTF 1 -#define LEVEL_CVT 2 +#define LEVEL_GTF2 2 +#define LEVEL_CVT 3 static struct edid_quirk { char *vendor; @@ -713,6 +714,71 @@ drm_monitor_supports_rb(struct edid *edid) return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); } +static void +find_gtf2(struct detailed_timing *t, void *data) +{ + u8 *r = (u8 *)t; + if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) + *(u8 **)data = r; +} + +/* Secondary GTF curve kicks in above some break frequency */ +static int +drm_gtf2_hbreak(struct edid *edid) +{ + u8 *r = NULL; + drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); + return r ? (r[12] * 2) : 0; +} + +static int +drm_gtf2_2c(struct edid *edid) +{ + u8 *r = NULL; + drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); + return r ? r[13] : 0; +} + +static int +drm_gtf2_m(struct edid *edid) +{ + u8 *r = NULL; + drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); + return r ? (r[15] << 8) + r[14] : 0; +} + +static int +drm_gtf2_k(struct edid *edid) +{ + u8 *r = NULL; + drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); + return r ? r[16] : 0; +} + +static int +drm_gtf2_2j(struct edid *edid) +{ + u8 *r = NULL; + drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); + return r ? r[17] : 0; +} + +/** + * standard_timing_level - get std. timing level(CVT/GTF/DMT) + * @edid: EDID block to scan + */ +static int standard_timing_level(struct edid *edid) +{ + if (edid->revision >= 2) { + if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) + return LEVEL_CVT; + if (drm_gtf2_hbreak(edid)) + return LEVEL_GTF2; + return LEVEL_GTF; + } + return LEVEL_DMT; +} + /* * 0 is reserved. The spec says 0x01 fill for unused timings. Some old * monitors fill with ascii space (0x20) instead. @@ -734,8 +800,8 @@ bad_std_timing(u8 a, u8 b) * and convert them into a real mode using CVT/GTF/DMT. */ static struct drm_display_mode * -drm_mode_std(struct drm_connector *connector, struct std_timing *t, - int revision, int timing_level) +drm_mode_std(struct drm_connector *connector, struct edid *edid, + struct std_timing *t, int revision) { struct drm_device *dev = connector->dev; struct drm_display_mode *m, *mode = NULL; @@ -745,6 +811,7 @@ drm_mode_std(struct drm_connector *connector, struct std_timing *t, >> EDID_TIMING_ASPECT_SHIFT; unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) >> EDID_TIMING_VFREQ_SHIFT; + int timing_level = standard_timing_level(edid); if (bad_std_timing(t->hsize, t->vfreq_aspect)) return NULL; @@ -806,6 +873,23 @@ drm_mode_std(struct drm_connector *connector, struct std_timing *t, case LEVEL_GTF: mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); break; + case LEVEL_GTF2: + /* + * This is potentially wrong if there's ever a monitor with + * more than one ranges section, each claiming a different + * secondary GTF curve. Please don't do that. + */ + mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); + if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { + kfree(mode); + mode = drm_gtf_mode_complex(dev, hsize, vsize, + vrefresh_rate, 0, 0, + drm_gtf2_m(edid), + drm_gtf2_2c(edid), + drm_gtf2_k(edid), + drm_gtf2_2j(edid)); + } + break; case LEVEL_CVT: mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, false); @@ -1042,19 +1126,6 @@ static int add_established_modes(struct drm_connector *connector, struct edid *e return modes; } -/** - * stanard_timing_level - get std. timing level(CVT/GTF/DMT) - * @edid: EDID block to scan - */ -static int standard_timing_level(struct edid *edid) -{ - if (edid->revision >= 2) { - if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) - return LEVEL_CVT; - return LEVEL_GTF; - } - return LEVEL_DMT; -} /** * add_standard_modes - get std. modes from EDID and add them @@ -1066,15 +1137,13 @@ static int standard_timing_level(struct edid *edid) static int add_standard_modes(struct drm_connector *connector, struct edid *edid) { int i, modes = 0; - int timing_level; - - timing_level = standard_timing_level(edid); for (i = 0; i < EDID_STD_TIMINGS; i++) { struct drm_display_mode *newmode; - newmode = drm_mode_std(connector, &edid->standard_timings[i], - edid->revision, timing_level); + newmode = drm_mode_std(connector, edid, + &edid->standard_timings[i], + edid->revision); if (newmode) { drm_mode_probed_add(connector, newmode); modes++; @@ -1140,9 +1209,6 @@ range_pixel_clock(struct edid *edid, u8 *t) return t[9] * 10000 + 5001; } -/* - * XXX fix this for GTF secondary curve formula - */ static bool mode_in_range(struct drm_display_mode *mode, struct edid *edid, struct detailed_timing *timing) @@ -1339,7 +1405,6 @@ static int add_detailed_modes(struct drm_connector *connector, { int i, modes = 0; struct detailed_non_pixel *data = &timing->data.other_data; - int timing_level = standard_timing_level(edid); int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF); struct drm_display_mode *newmode; struct drm_device *dev = connector->dev; @@ -1370,8 +1435,8 @@ static int add_detailed_modes(struct drm_connector *connector, struct drm_display_mode *newmode; std = &data->data.timings[i]; - newmode = drm_mode_std(connector, std, edid->revision, - timing_level); + newmode = drm_mode_std(connector, edid, std, + edid->revision); if (newmode) { drm_mode_probed_add(connector, newmode); modes++; |