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drm/i915/icl: fix transcoder state readout

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Commit 2ca711caec ("drm/i915/icl: Consider DSI for getting transcoder
state") clobbers the previously read TRANS_DDI_FUNC_CTL_EDP register
contents with TRANS_DDI_FUNC_CTL_DSI0 contents. Fix the state readout,
and handle DSI 1 while at it.

Use a bitmask for iterating and logging transcoders, because the allowed
combinations are a bit funky.

Fixes: 2ca711caec ("drm/i915/icl: Consider DSI for getting transcoder state")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108928
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181204101926.17174-1-jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2018-12-04 12:19:26 +02:00
parent 5179749925
commit 0716931a82
1 changed files with 33 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

56
drivers/gpu/drm/i915/intel_display.c
View file

@ -9476,13 +9476,18 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum intel_display_power_domain power_domain;
unsigned long panel_transcoder_mask = BIT(TRANSCODER_EDP);
unsigned long enabled_panel_transcoders = 0;
enum transcoder panel_transcoder;
u32 tmp;
bool is_dsi = false;
bool is_edp = false;
if (IS_ICELAKE(dev_priv))
panel_transcoder_mask |=
BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1);
/*
* The pipe->transcoder mapping is fixed with the exception of the eDP
* transcoder handled below.
* and DSI transcoders handled below.
*/
pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
@ -9490,23 +9495,26 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
* XXX: Do intel_display_power_get_if_enabled before reading this (for
* consistency and less surprising code; it's in always on power).
*/
tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
if (tmp & TRANS_DDI_FUNC_ENABLE)
is_edp = true;
if (IS_ICELAKE(dev_priv)) {
tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_DSI_0));
if (tmp & TRANS_DDI_FUNC_ENABLE)
is_dsi = true;
}
WARN_ON(is_edp && is_dsi);
if (is_edp || is_dsi) {
for_each_set_bit(panel_transcoder, &panel_transcoder_mask, 32) {
enum pipe trans_pipe;
tmp = I915_READ(TRANS_DDI_FUNC_CTL(panel_transcoder));
if (!(tmp & TRANS_DDI_FUNC_ENABLE))
continue;
/*
* Log all enabled ones, only use the first one.
*
* FIXME: This won't work for two separate DSI displays.
*/
enabled_panel_transcoders |= BIT(panel_transcoder);
if (enabled_panel_transcoders != BIT(panel_transcoder))
continue;
switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
default:
WARN(1, "unknown pipe linked to edp transcoder\n");
WARN(1, "unknown pipe linked to transcoder %s\n",
transcoder_name(panel_transcoder));
/* fall through */
case TRANS_DDI_EDP_INPUT_A_ONOFF:
case TRANS_DDI_EDP_INPUT_A_ON:
@ -9520,14 +9528,16 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
break;
}
if (trans_pipe == crtc->pipe) {
if (is_edp)
pipe_config->cpu_transcoder = TRANSCODER_EDP;
else if (is_dsi)
pipe_config->cpu_transcoder = TRANSCODER_DSI_0;
}
if (trans_pipe == crtc->pipe)
pipe_config->cpu_transcoder = panel_transcoder;
}
/*
* Valid combos: none, eDP, DSI0, DSI1, DSI0+DSI1
*/
WARN_ON((enabled_panel_transcoders & BIT(TRANSCODER_EDP)) &&
enabled_panel_transcoders != BIT(TRANSCODER_EDP));
power_domain = POWER_DOMAIN_TRANSCODER(pipe_config->cpu_transcoder);
if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
return false;