drm/radeon/kms/atom: add crtc disable function

Disables the crts as per dpms and also disables the ppll
associated with the crtc.  This should save additional power.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 96 insertions, 56 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 8c2d6478a22..a22d5a3bca4 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -669,56 +669,25 @@ static void atombios_crtc_set_dcpll(struct drm_crtc *crtc)
         atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
 }
 
-static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
+static void atombios_crtc_program_pll(struct drm_crtc *crtc,
+                                      int crtc_id,
+                                      int pll_id,
+                                      u32 encoder_mode,
+                                      u32 encoder_id,
+                                      u32 clock,
+                                      u32 ref_div,
+                                      u32 fb_div,
+                                      u32 frac_fb_div,
+                                      u32 post_div)
 {
-        struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
         struct drm_device *dev = crtc->dev;
         struct radeon_device *rdev = dev->dev_private;
-        struct drm_encoder *encoder = NULL;
-        struct radeon_encoder *radeon_encoder = NULL;
         u8 frev, crev;
-        int index;
+        int index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
         union set_pixel_clock args;
-        u32 pll_clock = mode->clock;
-        u32 ref_div = 0, fb_div = 0, frac_fb_div = 0, post_div = 0;
-        struct radeon_pll *pll;
-        u32 adjusted_clock;
-        int encoder_mode = 0;
 
         memset(&args, 0, sizeof(args));
 
-        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-                if (encoder->crtc == crtc) {
-                        radeon_encoder = to_radeon_encoder(encoder);
-                        encoder_mode = atombios_get_encoder_mode(encoder);
-                        break;
-                }
-        }
-
-        if (!radeon_encoder)
-                return;
-
-        switch (radeon_crtc->pll_id) {
-        case ATOM_PPLL1:
-                pll = &rdev->clock.p1pll;
-                break;
-        case ATOM_PPLL2:
-                pll = &rdev->clock.p2pll;
-                break;
-        case ATOM_DCPLL:
-        case ATOM_PPLL_INVALID:
-        default:
-                pll = &rdev->clock.dcpll;
-                break;
-        }
-
-        /* adjust pixel clock as needed */
-        adjusted_clock = atombios_adjust_pll(crtc, mode, pll);
-
-        radeon_compute_pll(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,
-                           &ref_div, &post_div);
-
-        index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
         if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
                                    &crev))
                 return;
@@ -727,47 +696,49 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode
         case 1:
                 switch (crev) {
                 case 1:
-                        args.v1.usPixelClock = cpu_to_le16(mode->clock / 10);
+                        if (clock == ATOM_DISABLE)
+                                return;
+                        args.v1.usPixelClock = cpu_to_le16(clock / 10);
                         args.v1.usRefDiv = cpu_to_le16(ref_div);
                         args.v1.usFbDiv = cpu_to_le16(fb_div);
                         args.v1.ucFracFbDiv = frac_fb_div;
                         args.v1.ucPostDiv = post_div;
-                        args.v1.ucPpll = radeon_crtc->pll_id;
-                        args.v1.ucCRTC = radeon_crtc->crtc_id;
+                        args.v1.ucPpll = pll_id;
+                        args.v1.ucCRTC = crtc_id;
                         args.v1.ucRefDivSrc = 1;
                         break;
                 case 2:
-                        args.v2.usPixelClock = cpu_to_le16(mode->clock / 10);
+                        args.v2.usPixelClock = cpu_to_le16(clock / 10);
                         args.v2.usRefDiv = cpu_to_le16(ref_div);
                         args.v2.usFbDiv = cpu_to_le16(fb_div);
                         args.v2.ucFracFbDiv = frac_fb_div;
                         args.v2.ucPostDiv = post_div;
-                        args.v2.ucPpll = radeon_crtc->pll_id;
-                        args.v2.ucCRTC = radeon_crtc->crtc_id;
+                        args.v2.ucPpll = pll_id;
+                        args.v2.ucCRTC = crtc_id;
                         args.v2.ucRefDivSrc = 1;
                         break;
                 case 3:
-                        args.v3.usPixelClock = cpu_to_le16(mode->clock / 10);
+                        args.v3.usPixelClock = cpu_to_le16(clock / 10);
                         args.v3.usRefDiv = cpu_to_le16(ref_div);
                         args.v3.usFbDiv = cpu_to_le16(fb_div);
                         args.v3.ucFracFbDiv = frac_fb_div;
                         args.v3.ucPostDiv = post_div;
-                        args.v3.ucPpll = radeon_crtc->pll_id;
-                        args.v3.ucMiscInfo = (radeon_crtc->pll_id << 2);
-                        args.v3.ucTransmitterId = radeon_encoder->encoder_id;
+                        args.v3.ucPpll = pll_id;
+                        args.v3.ucMiscInfo = (pll_id << 2);
+                        args.v3.ucTransmitterId = encoder_id;
                         args.v3.ucEncoderMode = encoder_mode;
                         break;
                 case 5:
-                        args.v5.ucCRTC = radeon_crtc->crtc_id;
-                        args.v5.usPixelClock = cpu_to_le16(mode->clock / 10);
+                        args.v5.ucCRTC = crtc_id;
+                        args.v5.usPixelClock = cpu_to_le16(clock / 10);
                         args.v5.ucRefDiv = ref_div;
                         args.v5.usFbDiv = cpu_to_le16(fb_div);
                         args.v5.ulFbDivDecFrac = cpu_to_le32(frac_fb_div * 100000);
                         args.v5.ucPostDiv = post_div;
                         args.v5.ucMiscInfo = 0; /* HDMI depth, etc. */
-                        args.v5.ucTransmitterID = radeon_encoder->encoder_id;
+                        args.v5.ucTransmitterID = encoder_id;
                         args.v5.ucEncoderMode = encoder_mode;
-                        args.v5.ucPpll = radeon_crtc->pll_id;
+                        args.v5.ucPpll = pll_id;
                         break;
                 default:
                         DRM_ERROR("Unknown table version %d %d\n", frev, crev);
@@ -782,6 +753,56 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode
         atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
 }
 
+static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
+{
+        struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+        struct drm_device *dev = crtc->dev;
+        struct radeon_device *rdev = dev->dev_private;
+        struct drm_encoder *encoder = NULL;
+        struct radeon_encoder *radeon_encoder = NULL;
+        u32 pll_clock = mode->clock;
+        u32 ref_div = 0, fb_div = 0, frac_fb_div = 0, post_div = 0;
+        struct radeon_pll *pll;
+        u32 adjusted_clock;
+        int encoder_mode = 0;
+
+        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+                if (encoder->crtc == crtc) {
+                        radeon_encoder = to_radeon_encoder(encoder);
+                        encoder_mode = atombios_get_encoder_mode(encoder);
+                        break;
+                }
+        }
+
+        if (!radeon_encoder)
+                return;
+
+        switch (radeon_crtc->pll_id) {
+        case ATOM_PPLL1:
+                pll = &rdev->clock.p1pll;
+                break;
+        case ATOM_PPLL2:
+                pll = &rdev->clock.p2pll;
+                break;
+        case ATOM_DCPLL:
+        case ATOM_PPLL_INVALID:
+        default:
+                pll = &rdev->clock.dcpll;
+                break;
+        }
+
+        /* adjust pixel clock as needed */
+        adjusted_clock = atombios_adjust_pll(crtc, mode, pll);
+
+        radeon_compute_pll(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,
+                           &ref_div, &post_div);
+
+        atombios_crtc_program_pll(crtc, radeon_crtc->crtc_id, radeon_crtc->pll_id,
+                                  encoder_mode, radeon_encoder->encoder_id, mode->clock,
+                                  ref_div, fb_div, frac_fb_div, post_div);
+
+}
+
 static int evergreen_crtc_set_base(struct drm_crtc *crtc, int x, int y,
                                    struct drm_framebuffer *old_fb)
 {
@@ -1191,6 +1212,24 @@ static void atombios_crtc_commit(struct drm_crtc *crtc)
         atombios_lock_crtc(crtc, ATOM_DISABLE);
 }
 
+static void atombios_crtc_disable(struct drm_crtc *crtc)
+{
+        struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+        atombios_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+
+        switch (radeon_crtc->pll_id) {
+        case ATOM_PPLL1:
+        case ATOM_PPLL2:
+                /* disable the ppll */
+                atombios_crtc_program_pll(crtc, radeon_crtc->crtc_id, radeon_crtc->pll_id,
+                                          0, 0, ATOM_DISABLE, 0, 0, 0, 0);
+                break;
+        default:
+                break;
+        }
+        radeon_crtc->pll_id = -1;
+}
+
 static const struct drm_crtc_helper_funcs atombios_helper_funcs = {
         .dpms = atombios_crtc_dpms,
         .mode_fixup = atombios_crtc_mode_fixup,
@@ -1199,6 +1238,7 @@ static const struct drm_crtc_helper_funcs atombios_helper_funcs = {
         .prepare = atombios_crtc_prepare,
         .commit = atombios_crtc_commit,
         .load_lut = radeon_crtc_load_lut,
+        .disable = atombios_crtc_disable,
 };
 
 void radeon_atombios_init_crtc(struct drm_device *dev,