From dc911f5bd8aacfcf8aabd5c26c88e04c837a938e Mon Sep 17 00:00:00 2001
From: Jim Bride <jim.bride@linux.intel.com>
Date: Wed, 9 Aug 2017 12:48:53 -0700
Subject: [PATCH] drm/i915/edp: Allow alternate fixed mode for eDP if available.
Git-commit: dc911f5bd8aacfcf8aabd5c26c88e04c837a938e
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900
Some fixed resolution panels actually support more than one mode,
with the only thing different being the refresh rate. Having this
alternate mode available to us is desirable, because it allows us to
test PSR on panels whose setup time at the preferred mode is too long.
With this patch we allow the use of the alternate mode if it's
available and it was specifically requested.
v2 and v3: Rebase
V4: * Fix up some leaky mode stuff (Chris) * Rebase
V5: * Fix a NULL pointer derefrence (David Weinehall)
V6: * Whitespace / spelling / checkpatch clean-up; no functional change. (David) * Rebase
Cc: David Weinehall <david.weinehall@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1502308133-26892-1-git-send-email-jim.bride@linux.intel.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/i915/intel_dp.c | 38 ++++++++++++++++++++++++++++++++-----
drivers/gpu/drm/i915/intel_drv.h | 2 +
drivers/gpu/drm/i915/intel_dsi.c | 2 -
drivers/gpu/drm/i915/intel_dvo.c | 2 -
drivers/gpu/drm/i915/intel_lvds.c | 3 +-
drivers/gpu/drm/i915/intel_panel.c | 6 +++++
6 files changed, 45 insertions(+), 8 deletions(-)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1619,6 +1619,23 @@ static int intel_dp_compute_bpp(struct i
return bpp;
}
+static bool intel_edp_compare_alt_mode(struct drm_display_mode *m1,
+ struct drm_display_mode *m2)
+{
+ bool bres = false;
+
+ if (m1 && m2)
+ bres = (m1->hdisplay == m2->hdisplay &&
+ m1->hsync_start == m2->hsync_start &&
+ m1->hsync_end == m2->hsync_end &&
+ m1->htotal == m2->htotal &&
+ m1->vdisplay == m2->vdisplay &&
+ m1->vsync_start == m2->vsync_start &&
+ m1->vsync_end == m2->vsync_end &&
+ m1->vtotal == m2->vtotal);
+ return bres;
+}
+
bool
intel_dp_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
@@ -1665,8 +1682,16 @@ intel_dp_compute_config(struct intel_enc
pipe_config->has_audio = intel_conn_state->force_audio == HDMI_AUDIO_ON;
if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
- intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
- adjusted_mode);
+ struct drm_display_mode *panel_mode =
+ intel_connector->panel.alt_fixed_mode;
+ struct drm_display_mode *req_mode = &pipe_config->base.mode;
+
+ if (!intel_edp_compare_alt_mode(req_mode, panel_mode))
+ panel_mode = intel_connector->panel.fixed_mode;
+
+ drm_mode_debug_printmodeline(panel_mode);
+
+ intel_fixed_panel_mode(panel_mode, adjusted_mode);
if (INTEL_GEN(dev_priv) >= 9) {
int ret;
@@ -5794,6 +5819,7 @@ static bool intel_edp_init_connector(str
struct drm_device *dev = intel_encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_display_mode *fixed_mode = NULL;
+ struct drm_display_mode *alt_fixed_mode = NULL;
struct drm_display_mode *downclock_mode = NULL;
bool has_dpcd;
struct drm_display_mode *scan;
@@ -5849,13 +5875,14 @@ static bool intel_edp_init_connector(str
}
intel_connector->edid = edid;
- /* prefer fixed mode from EDID if available */
+ /* prefer fixed mode from EDID if available, save an alt mode also */
list_for_each_entry(scan, &connector->probed_modes, head) {
if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
fixed_mode = drm_mode_duplicate(dev, scan);
downclock_mode = intel_dp_drrs_init(
intel_connector, fixed_mode);
- break;
+ } else if (!alt_fixed_mode) {
+ alt_fixed_mode = drm_mode_duplicate(dev, scan);
}
}
@@ -5892,7 +5919,8 @@ static bool intel_edp_init_connector(str
pipe_name(pipe));
}
- intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
+ intel_panel_init(&intel_connector->panel, fixed_mode, alt_fixed_mode,
+ downclock_mode);
intel_connector->panel.backlight.power = intel_edp_backlight_power;
intel_panel_setup_backlight(connector, pipe);
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -265,6 +265,7 @@ struct intel_encoder {
struct intel_panel {
struct drm_display_mode *fixed_mode;
+ struct drm_display_mode *alt_fixed_mode;
struct drm_display_mode *downclock_mode;
/* backlight */
@@ -1678,6 +1679,7 @@ void intel_overlay_reset(struct drm_i915
/* intel_panel.c */
int intel_panel_init(struct intel_panel *panel,
struct drm_display_mode *fixed_mode,
+ struct drm_display_mode *alt_fixed_mode,
struct drm_display_mode *downclock_mode);
void intel_panel_fini(struct intel_panel *panel);
void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -1849,7 +1849,7 @@ void intel_dsi_init(struct drm_i915_priv
connector->display_info.width_mm = fixed_mode->width_mm;
connector->display_info.height_mm = fixed_mode->height_mm;
- intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
+ intel_panel_init(&intel_connector->panel, fixed_mode, NULL, NULL);
intel_panel_setup_backlight(connector, INVALID_PIPE);
intel_dsi_add_properties(intel_connector);
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -552,7 +552,7 @@ void intel_dvo_init(struct drm_i915_priv
*/
intel_panel_init(&intel_connector->panel,
intel_dvo_get_current_mode(connector),
- NULL);
+ NULL, NULL);
intel_dvo->panel_wants_dither = true;
}
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -1138,7 +1138,8 @@ void intel_lvds_init(struct drm_i915_pri
out:
mutex_unlock(&dev->mode_config.mutex);
- intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
+ intel_panel_init(&intel_connector->panel, fixed_mode, NULL,
+ downclock_mode);
intel_panel_setup_backlight(connector, INVALID_PIPE);
lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1920,11 +1920,13 @@ intel_panel_init_backlight_funcs(struct
int intel_panel_init(struct intel_panel *panel,
struct drm_display_mode *fixed_mode,
+ struct drm_display_mode *alt_fixed_mode,
struct drm_display_mode *downclock_mode)
{
intel_panel_init_backlight_funcs(panel);
panel->fixed_mode = fixed_mode;
+ panel->alt_fixed_mode = alt_fixed_mode;
panel->downclock_mode = downclock_mode;
return 0;
@@ -1938,6 +1940,10 @@ void intel_panel_fini(struct intel_panel
if (panel->fixed_mode)
drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
+ if (panel->alt_fixed_mode)
+ drm_mode_destroy(intel_connector->base.dev,
+ panel->alt_fixed_mode);
+
if (panel->downclock_mode)
drm_mode_destroy(intel_connector->base.dev,
panel->downclock_mode);